attenuverter_mixer.sch-bak

EESchema Schematic File Version 4
LIBS:attenuverter_mixer-cache
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L attenuverter_mixer:AudioJack1_SwitchT J1
U 1 1 5D7F5F96
P 900 1050
F 0 "J1" H 932 1367 50  0000 C CNN
F 1 "Input" H 932 1276 50  0000 C CNN
F 2 "kicad_libraries:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles" H 900 1050 50  0001 C CNN
F 3 "~" H 900 1050 50  0001 C CNN
	1    900  1050
	1    0    0    -1  
$EndComp
Wire Wire Line
	1250 1150 1100 1150
Text Label 4550 1450 0    50   ~ 0
out_1
Wire Wire Line
	4550 1450 4850 1450
Wire Wire Line
	4850 1450 4850 1400
Text Label 6100 3150 0    50   ~ 0
out_1
Text Label 6100 3450 0    50   ~ 0
out_2
Text Label 6100 3750 0    50   ~ 0
out_3
Text Label 6100 4050 0    50   ~ 0
out_4
$Comp
L Device:R R11
U 1 1 5D9670DC
P 6650 3150
F 0 "R11" V 6443 3150 50  0000 C CNN
F 1 "220k" V 6534 3150 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 6580 3150 50  0001 C CNN
F 3 "~" H 6650 3150 50  0001 C CNN
	1    6650 3150
	0    1    1    0   
$EndComp
$Comp
L Device:R R12
U 1 1 5D967ADD
P 6650 3450
F 0 "R12" V 6443 3450 50  0000 C CNN
F 1 "220k" V 6534 3450 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 6580 3450 50  0001 C CNN
F 3 "~" H 6650 3450 50  0001 C CNN
	1    6650 3450
	0    1    1    0   
$EndComp
$Comp
L Device:R R13
U 1 1 5D968113
P 6650 3750
F 0 "R13" V 6443 3750 50  0000 C CNN
F 1 "220k" V 6534 3750 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 6580 3750 50  0001 C CNN
F 3 "~" H 6650 3750 50  0001 C CNN
	1    6650 3750
	0    1    1    0   
$EndComp
$Comp
L Device:R R14
U 1 1 5D968461
P 6650 4050
F 0 "R14" V 6443 4050 50  0000 C CNN
F 1 "220k" V 6534 4050 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 6580 4050 50  0001 C CNN
F 3 "~" H 6650 4050 50  0001 C CNN
	1    6650 4050
	0    1    1    0   
$EndComp
Wire Wire Line
	6100 3450 6500 3450
Wire Wire Line
	6500 3150 6100 3150
Wire Wire Line
	6100 3750 6500 3750
Wire Wire Line
	6500 4050 6100 4050
$Comp
L Amplifier_Operational:TL074 U5
U 1 1 5D97FD2B
P 7700 3250
F 0 "U5" H 7700 2950 50  0000 C CNN
F 1 "TL074" H 7700 3050 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 7650 3350 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 7750 3450 50  0001 C CNN
	1    7700 3250
	1    0    0    -1  
$EndComp
Wire Wire Line
	6800 4050 6900 4050
Wire Wire Line
	6900 4050 6900 3750
Wire Wire Line
	6900 3150 6800 3150
Wire Wire Line
	6800 3450 6900 3450
Connection ~ 6900 3450
Wire Wire Line
	6900 3450 6900 3350
Wire Wire Line
	6900 3750 6800 3750
Connection ~ 6900 3750
Wire Wire Line
	6900 3750 6900 3450
$Comp
L power:GND #PWR0113
U 1 1 5D9A7024
P 7800 2800
F 0 "#PWR0113" H 7800 2550 50  0001 C CNN
F 1 "GND" H 7805 2627 50  0000 C CNN
F 2 "" H 7800 2800 50  0001 C CNN
F 3 "" H 7800 2800 50  0001 C CNN
	1    7800 2800
	1    0    0    -1  
$EndComp
$Comp
L Device:R R22
U 1 1 5D9AC6AB
P 7700 4150
F 0 "R22" V 7493 4150 50  0000 C CNN
F 1 "220k" V 7584 4150 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 7630 4150 50  0001 C CNN
F 3 "~" H 7700 4150 50  0001 C CNN
	1    7700 4150
	0    1    1    0   
$EndComp
Wire Wire Line
	7550 4150 7150 4150
$Comp
L Device:R R5
U 1 1 5D9C6501
P 10000 3350
F 0 "R5" V 9793 3350 50  0000 C CNN
F 1 "330R" V 9884 3350 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical" V 9930 3350 50  0001 C CNN
F 3 "~" H 10000 3350 50  0001 C CNN
	1    10000 3350
	0    1    1    0   
$EndComp
Wire Wire Line
	9850 3350 9600 3350
$Comp
L attenuverter_mixer:AudioJack1_SwitchT J9
U 1 1 5D9CD1B6
P 10500 3350
F 0 "J9" H 10320 3314 50  0000 R CNN
F 1 "Sum out" H 10320 3223 50  0000 R CNN
F 2 "kicad_libraries:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles" H 10500 3350 50  0001 C CNN
F 3 "~" H 10500 3350 50  0001 C CNN
	1    10500 3350
	-1   0    0    -1  
$EndComp
NoConn ~ 10300 3450
$Comp
L Amplifier_Operational:TL074 U5
U 2 1 5D9EE1ED
P 8900 3350
F 0 "U5" H 8900 3050 50  0000 C CNN
F 1 "TL074" H 8900 3150 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 8850 3450 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 8950 3550 50  0001 C CNN
	2    8900 3350
	1    0    0    1   
$EndComp
$Comp
L Device:R R19
U 1 1 5D9F0183
P 8250 3250
F 0 "R19" V 8450 3300 50  0000 R CNN
F 1 "100k" V 8350 3350 50  0000 R CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 8180 3250 50  0001 C CNN
F 3 "~" H 8250 3250 50  0001 C CNN
	1    8250 3250
	0    -1   -1   0   
$EndComp
Wire Wire Line
	8600 3250 8500 3250
Wire Wire Line
	8500 3250 8500 2850
$Comp
L Device:R R25
U 1 1 5DA12B58
P 9950 2850
F 0 "R25" V 10050 2900 50  0000 R CNN
F 1 "100k" V 9850 2950 50  0000 R CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 9880 2850 50  0001 C CNN
F 3 "~" H 9950 2850 50  0001 C CNN
	1    9950 2850
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C15
U 1 1 5DA20330
P 9600 3100
F 0 "C15" H 9485 3054 50  0000 R CNN
F 1 "18pF" H 9485 3145 50  0000 R CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm" H 9638 2950 50  0001 C CNN
F 3 "~" H 9600 3100 50  0001 C CNN
	1    9600 3100
	-1   0    0    1   
$EndComp
Wire Wire Line
	9600 3350 9600 3250
Wire Wire Line
	9600 2950 9600 2850
Connection ~ 9600 3350
$Comp
L power:GND #PWR0115
U 1 1 5DA6F3E6
P 8400 3650
F 0 "#PWR0115" H 8400 3400 50  0001 C CNN
F 1 "GND" H 8405 3477 50  0000 C CNN
F 2 "" H 8400 3650 50  0001 C CNN
F 3 "" H 8400 3650 50  0001 C CNN
	1    8400 3650
	1    0    0    -1  
$EndComp
Wire Wire Line
	8400 3450 8600 3450
$Comp
L Amplifier_Operational:TL072 U1
U 3 1 5DD8C3B7
P 900 6850
F 0 "U1" H 858 6896 50  0000 L CNN
F 1 "TL072" H 858 6805 50  0000 L CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 850 6950 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 950 7050 50  0001 C CNN
	3    900  6850
	1    0    0    -1  
$EndComp
$Comp
L power:+12V #PWR0125
U 1 1 5DDD0E63
P 800 6550
F 0 "#PWR0125" H 800 6400 50  0001 C CNN
F 1 "+12V" H 815 6723 50  0000 C CNN
F 2 "" H 800 6550 50  0001 C CNN
F 3 "" H 800 6550 50  0001 C CNN
	1    800  6550
	1    0    0    -1  
$EndComp
$Comp
L power:-12V #PWR0126
U 1 1 5DDD2599
P 800 7150
F 0 "#PWR0126" H 800 7250 50  0001 C CNN
F 1 "-12V" H 815 7323 50  0000 C CNN
F 2 "" H 800 7150 50  0001 C CNN
F 3 "" H 800 7150 50  0001 C CNN
	1    800  7150
	-1   0    0    1   
$EndComp
$Comp
L Amplifier_Operational:TL072 U2
U 3 1 5DDFA4C8
P 1350 6850
F 0 "U2" H 1308 6896 50  0000 L CNN
F 1 "TL072" H 1308 6805 50  0000 L CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 1300 6950 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 1400 7050 50  0001 C CNN
	3    1350 6850
	1    0    0    -1  
$EndComp
$Comp
L power:+12V #PWR0127
U 1 1 5DDFA4D2
P 1250 6550
F 0 "#PWR0127" H 1250 6400 50  0001 C CNN
F 1 "+12V" H 1265 6723 50  0000 C CNN
F 2 "" H 1250 6550 50  0001 C CNN
F 3 "" H 1250 6550 50  0001 C CNN
	1    1250 6550
	1    0    0    -1  
$EndComp
$Comp
L power:-12V #PWR0128
U 1 1 5DDFA4DC
P 1250 7150
F 0 "#PWR0128" H 1250 7250 50  0001 C CNN
F 1 "-12V" H 1265 7323 50  0000 C CNN
F 2 "" H 1250 7150 50  0001 C CNN
F 3 "" H 1250 7150 50  0001 C CNN
	1    1250 7150
	-1   0    0    1   
$EndComp
$Comp
L Connector_Generic:Conn_02x05_Odd_Even J0
U 1 1 5DF894B6
P 10050 1450
F 0 "J0" H 10100 1867 50  0000 C CNN
F 1 "Eurorack power" H 10100 1776 50  0000 C CNN
F 2 "Connector_PinSocket_2.54mm:PinSocket_2x05_P2.54mm_Vertical" H 10050 1450 50  0001 C CNN
F 3 "~" H 10050 1450 50  0001 C CNN
	1    10050 1450
	1    0    0    -1  
$EndComp
$Comp
L power:+12V #PWR0132
U 1 1 5DFDBB31
P 10350 2100
F 0 "#PWR0132" H 10350 1950 50  0001 C CNN
F 1 "+12V" H 10365 2273 50  0000 C CNN
F 2 "" H 10350 2100 50  0001 C CNN
F 3 "" H 10350 2100 50  0001 C CNN
	1    10350 2100
	1    0    0    -1  
$EndComp
$Comp
L power:-12V #PWR0133
U 1 1 5DFF5FCE
P 10200 650
F 0 "#PWR0133" H 10200 750 50  0001 C CNN
F 1 "-12V" H 10215 823 50  0000 C CNN
F 2 "" H 10200 650 50  0001 C CNN
F 3 "" H 10200 650 50  0001 C CNN
	1    10200 650 
	-1   0    0    1   
$EndComp
$Comp
L Device:CP C1
U 1 1 5E01EB55
P 3650 6700
F 0 "C1" H 3768 6746 50  0000 L CNN
F 1 "10uF" H 3768 6655 50  0000 L CNN
F 2 "Capacitor_THT:CP_Radial_D5.0mm_P2.00mm" H 3688 6550 50  0001 C CNN
F 3 "~" H 3650 6700 50  0001 C CNN
	1    3650 6700
	1    0    0    -1  
$EndComp
$Comp
L Device:CP C2
U 1 1 5E01EFEE
P 3650 7000
F 0 "C2" H 3768 7046 50  0000 L CNN
F 1 "10uF" H 3768 6955 50  0000 L CNN
F 2 "Capacitor_THT:CP_Radial_D5.0mm_P2.00mm" H 3688 6850 50  0001 C CNN
F 3 "~" H 3650 7000 50  0001 C CNN
	1    3650 7000
	1    0    0    -1  
$EndComp
$Comp
L Device:C C3
U 1 1 5E01FB3C
P 4100 6700
F 0 "C3" H 4215 6746 50  0000 L CNN
F 1 "100nF" H 4215 6655 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 4138 6550 50  0001 C CNN
F 3 "~" H 4100 6700 50  0001 C CNN
	1    4100 6700
	1    0    0    -1  
$EndComp
$Comp
L Device:C C4
U 1 1 5E0203D6
P 4100 7000
F 0 "C4" H 4215 7046 50  0000 L CNN
F 1 "100nF" H 4215 6955 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 4138 6850 50  0001 C CNN
F 3 "~" H 4100 7000 50  0001 C CNN
	1    4100 7000
	1    0    0    -1  
$EndComp
Connection ~ 3650 6850
$Comp
L power:GND #PWR0134
U 1 1 5E116C30
P 3200 6850
F 0 "#PWR0134" H 3200 6600 50  0001 C CNN
F 1 "GND" H 3205 6677 50  0000 C CNN
F 2 "" H 3200 6850 50  0001 C CNN
F 3 "" H 3200 6850 50  0001 C CNN
	1    3200 6850
	1    0    0    -1  
$EndComp
Wire Wire Line
	3200 6850 3650 6850
$Comp
L power:+12V #PWR0135
U 1 1 5E12836E
P 3200 6550
F 0 "#PWR0135" H 3200 6400 50  0001 C CNN
F 1 "+12V" H 3215 6723 50  0000 C CNN
F 2 "" H 3200 6550 50  0001 C CNN
F 3 "" H 3200 6550 50  0001 C CNN
	1    3200 6550
	1    0    0    -1  
$EndComp
Wire Wire Line
	3200 6550 3650 6550
$Comp
L power:-12V #PWR0136
U 1 1 5E13F8DB
P 3200 7150
F 0 "#PWR0136" H 3200 7250 50  0001 C CNN
F 1 "-12V" H 3215 7323 50  0000 C CNN
F 2 "" H 3200 7150 50  0001 C CNN
F 3 "" H 3200 7150 50  0001 C CNN
	1    3200 7150
	-1   0    0    1   
$EndComp
Wire Wire Line
	3200 7150 3650 7150
$Comp
L Reference_Voltage:LM4040DBZ-5 U6
U 1 1 5D806F7C
P 7000 1100
F 0 "U6" V 6950 1300 50  0000 R CNN
F 1 "LM4040CIZ-5.0" V 6850 1750 50  0000 R CNN
F 2 "Package_TO_SOT_THT:TO-92_Inline" H 7000 900 50  0001 C CIN
F 3 "http://www.ti.com/lit/ds/symlink/lm4040-n.pdf" H 7000 1100 50  0001 C CIN
	1    7000 1100
	0    -1   -1   0   
$EndComp
$Comp
L power:GND #PWR0102
U 1 1 5D83B38C
P 7000 1250
F 0 "#PWR0102" H 7000 1000 50  0001 C CNN
F 1 "GND" H 7005 1077 50  0000 C CNN
F 2 "" H 7000 1250 50  0001 C CNN
F 3 "" H 7000 1250 50  0001 C CNN
	1    7000 1250
	1    0    0    -1  
$EndComp
$Comp
L power:+12V #PWR0103
U 1 1 5D851100
P 6200 950
F 0 "#PWR0103" H 6200 800 50  0001 C CNN
F 1 "+12V" H 6215 1123 50  0000 C CNN
F 2 "" H 6200 950 50  0001 C CNN
F 3 "" H 6200 950 50  0001 C CNN
	1    6200 950 
	1    0    0    -1  
$EndComp
$Comp
L Device:R R47
U 1 1 5D89B833
P 6600 950
F 0 "R47" V 6393 950 50  0000 C CNN
F 1 "R" V 6484 950 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical" V 6530 950 50  0001 C CNN
F 3 "~" H 6600 950 50  0001 C CNN
	1    6600 950 
	0    1    1    0   
$EndComp
Wire Wire Line
	6450 950  6200 950 
Wire Wire Line
	6750 950  7000 950 
Text Label 8250 1050 0    50   ~ 0
Vref
Wire Wire Line
	8000 1050 8100 1050
$Comp
L Device:D_Schottky D16
U 1 1 5DA18FFC
P 9800 800
F 0 "D16" V 9850 1000 50  0000 R CNN
F 1 "1N5819" V 9750 1200 50  0000 R CNN
F 2 "Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal" H 9800 800 50  0001 C CNN
F 3 "~" H 9800 800 50  0001 C CNN
	1    9800 800 
	0    -1   -1   0   
$EndComp
$Comp
L Device:D_Schottky D17
U 1 1 5DA1944E
P 10150 1950
F 0 "D17" V 10200 2100 50  0000 R CNN
F 1 "1N5819" V 10100 2300 50  0000 R CNN
F 2 "Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal" H 10150 1950 50  0001 C CNN
F 3 "~" H 10150 1950 50  0001 C CNN
	1    10150 1950
	0    -1   -1   0   
$EndComp
Wire Wire Line
	10350 1250 10450 1250
Wire Wire Line
	10350 1650 10450 1650
Wire Wire Line
	10150 2100 10350 2100
$Comp
L power:GND #PWR0104
U 1 1 5DA61ECF
P 9550 1800
F 0 "#PWR0104" H 9550 1550 50  0001 C CNN
F 1 "GND" H 9555 1627 50  0000 C CNN
F 2 "" H 9550 1800 50  0001 C CNN
F 3 "" H 9550 1800 50  0001 C CNN
	1    9550 1800
	1    0    0    -1  
$EndComp
Wire Wire Line
	9850 1800 10150 1800
$Comp
L power:GND #PWR0105
U 1 1 5DAA3246
P 10700 1800
F 0 "#PWR0105" H 10700 1550 50  0001 C CNN
F 1 "GND" H 10705 1627 50  0000 C CNN
F 2 "" H 10700 1800 50  0001 C CNN
F 3 "" H 10700 1800 50  0001 C CNN
	1    10700 1800
	1    0    0    -1  
$EndComp
Connection ~ 10150 1800
Wire Wire Line
	10150 1800 10450 1800
Wire Wire Line
	9850 1250 9700 1250
Wire Wire Line
	9700 950  9800 950 
Connection ~ 9800 950 
Wire Wire Line
	9800 950  10450 950 
Wire Wire Line
	9550 1800 9550 1550
Wire Wire Line
	9550 1550 9850 1550
Wire Wire Line
	9550 1550 9550 1350
Wire Wire Line
	9550 1350 9850 1350
Connection ~ 9550 1550
Wire Wire Line
	10350 1350 10700 1350
Wire Wire Line
	10700 1350 10700 1550
Wire Wire Line
	10350 1550 10700 1550
Connection ~ 10700 1550
Wire Wire Line
	10700 1550 10700 1800
$Comp
L power:GNDPWR #PWR0106
U 1 1 5DB61DF5
P 10900 1550
F 0 "#PWR0106" H 10900 1350 50  0001 C CNN
F 1 "GNDPWR" H 10904 1396 50  0000 C CNN
F 2 "" H 10900 1500 50  0001 C CNN
F 3 "" H 10900 1500 50  0001 C CNN
	1    10900 1550
	1    0    0    -1  
$EndComp
$Comp
L power:GNDPWR #PWR0107
U 1 1 5DB67091
P 9350 1550
F 0 "#PWR0107" H 9350 1350 50  0001 C CNN
F 1 "GNDPWR" H 9354 1396 50  0000 C CNN
F 2 "" H 9350 1500 50  0001 C CNN
F 3 "" H 9350 1500 50  0001 C CNN
	1    9350 1550
	1    0    0    -1  
$EndComp
$Comp
L power:GNDPWR #PWR0108
U 1 1 5DB7160A
P 900 1450
F 0 "#PWR0108" H 900 1250 50  0001 C CNN
F 1 "GNDPWR" H 904 1296 50  0000 C CNN
F 2 "" H 900 1400 50  0001 C CNN
F 3 "" H 900 1400 50  0001 C CNN
	1    900  1450
	1    0    0    -1  
$EndComp
$Comp
L power:GNDPWR #PWR0109
U 1 1 5DB72172
P 5050 1700
F 0 "#PWR0109" H 5050 1500 50  0001 C CNN
F 1 "GNDPWR" H 5054 1546 50  0000 C CNN
F 2 "" H 5050 1650 50  0001 C CNN
F 3 "" H 5050 1650 50  0001 C CNN
	1    5050 1700
	1    0    0    -1  
$EndComp
$Comp
L power:GNDPWR #PWR0110
U 1 1 5DB77ED6
P 10500 3950
F 0 "#PWR0110" H 10500 3750 50  0001 C CNN
F 1 "GNDPWR" H 10504 3796 50  0000 C CNN
F 2 "" H 10500 3900 50  0001 C CNN
F 3 "" H 10500 3900 50  0001 C CNN
	1    10500 3950
	1    0    0    -1  
$EndComp
Wire Wire Line
	1100 1050 1550 1050
Wire Wire Line
	9800 650  9800 600 
Wire Wire Line
	9800 600  10200 600 
Wire Wire Line
	10200 600  10200 650 
Wire Wire Line
	9850 1800 9850 1650
Wire Wire Line
	10450 1800 10450 1650
Wire Wire Line
	9350 1550 9350 1450
Wire Wire Line
	9350 1450 9850 1450
Wire Wire Line
	10900 1550 10900 1450
Wire Wire Line
	10900 1450 10350 1450
Wire Wire Line
	9700 950  9700 1250
Wire Wire Line
	10450 1250 10450 950 
Text Label 7450 5250 0    50   ~ 0
out_1
Text Label 7450 5550 0    50   ~ 0
out_2
Text Label 7450 5850 0    50   ~ 0
out_3
Text Label 7450 6150 0    50   ~ 0
out_4
Wire Wire Line
	7450 5550 7850 5550
Wire Wire Line
	7850 5250 7450 5250
Wire Wire Line
	7450 5850 7850 5850
Wire Wire Line
	7850 6150 7450 6150
$Comp
L Diode:1N4148 D8
U 1 1 5DD6FA45
P 8000 5250
F 0 "D8" H 8000 5034 50  0000 C CNN
F 1 "1N4148" H 8000 5125 50  0000 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 8000 5075 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 8000 5250 50  0001 C CNN
	1    8000 5250
	-1   0    0    1   
$EndComp
$Comp
L Diode:1N4148 D9
U 1 1 5DD7137F
P 8000 5550
F 0 "D9" H 8000 5334 50  0000 C CNN
F 1 "1N4148" H 8000 5425 50  0000 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 8000 5375 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 8000 5550 50  0001 C CNN
	1    8000 5550
	-1   0    0    1   
$EndComp
$Comp
L Diode:1N4148 D10
U 1 1 5DD7358E
P 8000 5850
F 0 "D10" H 8000 5634 50  0000 C CNN
F 1 "1N4148" H 8000 5725 50  0000 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 8000 5675 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 8000 5850 50  0001 C CNN
	1    8000 5850
	-1   0    0    1   
$EndComp
$Comp
L Diode:1N4148 D11
U 1 1 5DD747FE
P 8000 6150
F 0 "D11" H 8000 5934 50  0000 C CNN
F 1 "1N4148" H 8000 6025 50  0000 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 8000 5975 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 8000 6150 50  0001 C CNN
	1    8000 6150
	-1   0    0    1   
$EndComp
$Comp
L Device:R R45
U 1 1 5DD76308
P 8700 6150
F 0 "R45" V 8600 6200 50  0000 R CNN
F 1 "220k" V 8500 6250 50  0000 R CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 8630 6150 50  0001 C CNN
F 3 "~" H 8700 6150 50  0001 C CNN
	1    8700 6150
	0    -1   -1   0   
$EndComp
Wire Wire Line
	8350 5250 8150 5250
Wire Wire Line
	8150 5550 8350 5550
Connection ~ 8350 5550
Wire Wire Line
	8350 5550 8350 5250
Wire Wire Line
	8150 5850 8350 5850
Connection ~ 8350 5850
Wire Wire Line
	8350 5850 8350 5550
Wire Wire Line
	8150 6150 8350 6150
Connection ~ 8350 6150
Wire Wire Line
	8350 6150 8350 5850
$Comp
L power:GND #PWR0120
U 1 1 5DDEF0F0
P 8950 5850
F 0 "#PWR0120" H 8950 5600 50  0001 C CNN
F 1 "GND" H 8955 5677 50  0000 C CNN
F 2 "" H 8950 5850 50  0001 C CNN
F 3 "" H 8950 5850 50  0001 C CNN
	1    8950 5850
	1    0    0    -1  
$EndComp
Wire Wire Line
	8550 6150 8350 6150
$Comp
L Diode:1N4148 D14
U 1 1 5DE68CD6
P 8700 5850
F 0 "D14" H 8700 6066 50  0000 C CNN
F 1 "1N4148" H 8700 5975 50  0000 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 8700 5675 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 8700 5850 50  0001 C CNN
	1    8700 5850
	1    0    0    -1  
$EndComp
Wire Wire Line
	8950 5850 8850 5850
Wire Wire Line
	8550 5850 8350 5850
$Comp
L Amplifier_Operational:TL074 U5
U 3 1 5DEA0AF1
P 9350 5350
F 0 "U5" H 9350 5717 50  0000 C CNN
F 1 "TL074" H 9350 5626 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 9300 5450 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 9400 5550 50  0001 C CNN
	3    9350 5350
	1    0    0    -1  
$EndComp
Wire Wire Line
	8350 5250 9050 5250
Connection ~ 8350 5250
$Comp
L Diode:1N4148 D15
U 1 1 5DEB7989
P 9400 5750
F 0 "D15" H 9400 5966 50  0000 C CNN
F 1 "1N4148" H 9400 5875 50  0000 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 9400 5575 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 9400 5750 50  0001 C CNN
	1    9400 5750
	1    0    0    -1  
$EndComp
$Comp
L Device:R R48
U 1 1 5DEBA0ED
P 10000 5350
F 0 "R48" V 9793 5350 50  0000 C CNN
F 1 "330R" V 9884 5350 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical" V 9930 5350 50  0001 C CNN
F 3 "~" H 10000 5350 50  0001 C CNN
	1    10000 5350
	0    1    1    0   
$EndComp
Wire Wire Line
	9850 5350 9750 5350
Wire Wire Line
	9250 5750 9150 5750
Wire Wire Line
	9050 5750 9050 5450
Wire Wire Line
	9750 5350 9750 5750
Wire Wire Line
	9750 5750 9550 5750
Connection ~ 9750 5350
Wire Wire Line
	9750 5350 9650 5350
$Comp
L Device:R R46
U 1 1 5DEF3193
P 9150 5900
F 0 "R46" H 9350 5950 50  0000 R CNN
F 1 "220k" H 9450 5850 50  0000 R CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 9080 5900 50  0001 C CNN
F 3 "~" H 9150 5900 50  0001 C CNN
	1    9150 5900
	1    0    0    -1  
$EndComp
Connection ~ 9150 5750
Wire Wire Line
	9150 5750 9050 5750
Wire Wire Line
	9150 6050 9150 6150
$Comp
L attenuverter_mixer:AudioJack1_SwitchT J10
U 1 1 5DF14303
P 10700 5350
F 0 "J10" H 10520 5314 50  0000 R CNN
F 1 "Or out" H 10520 5223 50  0000 R CNN
F 2 "kicad_libraries:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles" H 10700 5350 50  0001 C CNN
F 3 "~" H 10700 5350 50  0001 C CNN
	1    10700 5350
	-1   0    0    -1  
$EndComp
NoConn ~ 10500 5450
Wire Wire Line
	10700 5650 10700 5850
Wire Wire Line
	8850 6150 9150 6150
$Comp
L power:-12V #PWR0122
U 1 1 5DE3372F
P 9150 6200
F 0 "#PWR0122" H 9150 6300 50  0001 C CNN
F 1 "-12V" H 9165 6373 50  0000 C CNN
F 2 "" H 9150 6200 50  0001 C CNN
F 3 "" H 9150 6200 50  0001 C CNN
	1    9150 6200
	-1   0    0    1   
$EndComp
Wire Wire Line
	9150 6200 9150 6150
Connection ~ 9150 6150
$Comp
L attenuverter_mixer:AudioJack1_SwitchT J2
U 1 1 5D8238F8
P 5050 1300
F 0 "J2" H 4870 1264 50  0000 R CNN
F 1 "Out" H 4870 1173 50  0000 R CNN
F 2 "kicad_libraries:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles" H 5050 1300 50  0001 C CNN
F 3 "~" H 5050 1300 50  0001 C CNN
	1    5050 1300
	-1   0    0    -1  
$EndComp
Wire Wire Line
	7950 4150 7850 4150
Wire Wire Line
	8400 3250 8500 3250
Connection ~ 8500 3250
Wire Wire Line
	8400 3450 8400 3650
Wire Wire Line
	8000 3250 8050 3250
Wire Wire Line
	7950 3550 8050 3550
Wire Wire Line
	8050 3550 8050 3250
Connection ~ 8050 3250
Wire Wire Line
	8050 3250 8100 3250
Wire Wire Line
	7150 3350 7400 3350
Wire Wire Line
	7150 3350 6900 3350
Connection ~ 7150 3350
Connection ~ 6900 3350
Wire Wire Line
	6900 3350 6900 3150
Wire Wire Line
	7400 3150 7250 3150
Wire Wire Line
	7250 3150 7250 2700
Wire Wire Line
	7250 2700 7800 2700
Wire Wire Line
	7800 2700 7800 2800
$Comp
L Amplifier_Operational:TL074 U5
U 4 1 5DA67BD1
P 7700 1050
F 0 "U5" H 7700 1417 50  0000 C CNN
F 1 "TL074" H 7700 1326 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 7650 1150 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 7750 1250 50  0001 C CNN
	4    7700 1050
	1    0    0    -1  
$EndComp
$Comp
L Amplifier_Operational:TL072 U3
U 3 1 5DB3E7FA
P 1750 6850
F 0 "U3" H 1708 6896 50  0000 L CNN
F 1 "TL072" H 1708 6805 50  0000 L CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 1700 6950 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 1800 7050 50  0001 C CNN
	3    1750 6850
	1    0    0    -1  
$EndComp
$Comp
L power:+12V #PWR0149
U 1 1 5DB3E804
P 1650 6550
F 0 "#PWR0149" H 1650 6400 50  0001 C CNN
F 1 "+12V" H 1665 6723 50  0000 C CNN
F 2 "" H 1650 6550 50  0001 C CNN
F 3 "" H 1650 6550 50  0001 C CNN
	1    1650 6550
	1    0    0    -1  
$EndComp
$Comp
L power:-12V #PWR0150
U 1 1 5DB3E80E
P 1650 7150
F 0 "#PWR0150" H 1650 7250 50  0001 C CNN
F 1 "-12V" H 1665 7323 50  0000 C CNN
F 2 "" H 1650 7150 50  0001 C CNN
F 3 "" H 1650 7150 50  0001 C CNN
	1    1650 7150
	-1   0    0    1   
$EndComp
$Comp
L Amplifier_Operational:TL072 U4
U 3 1 5DBAA1D9
P 2150 6850
F 0 "U4" H 2108 6896 50  0000 L CNN
F 1 "TL072" H 2108 6805 50  0000 L CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 2100 6950 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 2200 7050 50  0001 C CNN
	3    2150 6850
	1    0    0    -1  
$EndComp
$Comp
L power:+12V #PWR0151
U 1 1 5DBAA1E3
P 2050 6500
F 0 "#PWR0151" H 2050 6350 50  0001 C CNN
F 1 "+12V" H 2065 6673 50  0000 C CNN
F 2 "" H 2050 6500 50  0001 C CNN
F 3 "" H 2050 6500 50  0001 C CNN
	1    2050 6500
	1    0    0    -1  
$EndComp
$Comp
L power:-12V #PWR0152
U 1 1 5DBAA1ED
P 2050 7150
F 0 "#PWR0152" H 2050 7250 50  0001 C CNN
F 1 "-12V" H 2065 7323 50  0000 C CNN
F 2 "" H 2050 7150 50  0001 C CNN
F 3 "" H 2050 7150 50  0001 C CNN
	1    2050 7150
	-1   0    0    1   
$EndComp
$Comp
L Amplifier_Operational:TL074 U5
U 5 1 5DBE6212
P 2550 6850
F 0 "U5" H 2508 6896 50  0000 L CNN
F 1 "TL074" H 2508 6805 50  0000 L CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 2500 6950 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 2600 7050 50  0001 C CNN
	5    2550 6850
	1    0    0    -1  
$EndComp
$Comp
L power:+12V #PWR0153
U 1 1 5DBE621C
P 2450 6500
F 0 "#PWR0153" H 2450 6350 50  0001 C CNN
F 1 "+12V" H 2465 6673 50  0000 C CNN
F 2 "" H 2450 6500 50  0001 C CNN
F 3 "" H 2450 6500 50  0001 C CNN
	1    2450 6500
	1    0    0    -1  
$EndComp
$Comp
L power:-12V #PWR0154
U 1 1 5DBE6226
P 2450 7200
F 0 "#PWR0154" H 2450 7300 50  0001 C CNN
F 1 "-12V" H 2465 7373 50  0000 C CNN
F 2 "" H 2450 7200 50  0001 C CNN
F 3 "" H 2450 7200 50  0001 C CNN
	1    2450 7200
	-1   0    0    1   
$EndComp
Wire Wire Line
	3650 6550 4100 6550
Connection ~ 3650 6550
Wire Wire Line
	3650 6850 4100 6850
Connection ~ 4100 6850
Wire Wire Line
	3650 7150 4100 7150
Connection ~ 3650 7150
$Comp
L Device:C C8
U 1 1 5DD5B877
P 4550 6700
F 0 "C8" H 4665 6746 50  0000 L CNN
F 1 "100nF" H 4665 6655 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 4588 6550 50  0001 C CNN
F 3 "~" H 4550 6700 50  0001 C CNN
	1    4550 6700
	1    0    0    -1  
$EndComp
$Comp
L Device:C C9
U 1 1 5DD5B881
P 4550 7000
F 0 "C9" H 4665 7046 50  0000 L CNN
F 1 "100nF" H 4665 6955 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 4588 6850 50  0001 C CNN
F 3 "~" H 4550 7000 50  0001 C CNN
	1    4550 7000
	1    0    0    -1  
$EndComp
Wire Wire Line
	4100 6550 4550 6550
Wire Wire Line
	4100 6850 4550 6850
Connection ~ 4550 6850
Wire Wire Line
	4100 7150 4550 7150
Connection ~ 4100 6550
Connection ~ 4100 7150
$Comp
L Device:C C11
U 1 1 5DD94CDE
P 5000 6700
F 0 "C11" H 5115 6746 50  0000 L CNN
F 1 "100nF" H 5115 6655 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 5038 6550 50  0001 C CNN
F 3 "~" H 5000 6700 50  0001 C CNN
	1    5000 6700
	1    0    0    -1  
$EndComp
$Comp
L Device:C C12
U 1 1 5DD94CE8
P 5000 7000
F 0 "C12" H 5115 7046 50  0000 L CNN
F 1 "100nF" H 5115 6955 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 5038 6850 50  0001 C CNN
F 3 "~" H 5000 7000 50  0001 C CNN
	1    5000 7000
	1    0    0    -1  
$EndComp
Wire Wire Line
	4550 6550 5000 6550
Wire Wire Line
	4550 6850 5000 6850
Connection ~ 5000 6850
Wire Wire Line
	4550 7150 5000 7150
Connection ~ 4550 6550
Connection ~ 4550 7150
$Comp
L Device:C C13
U 1 1 5DE1733E
P 5450 6700
F 0 "C13" H 5565 6746 50  0000 L CNN
F 1 "100nF" H 5565 6655 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 5488 6550 50  0001 C CNN
F 3 "~" H 5450 6700 50  0001 C CNN
	1    5450 6700
	1    0    0    -1  
$EndComp
$Comp
L Device:C C16
U 1 1 5DE17348
P 5450 7000
F 0 "C16" H 5565 7046 50  0000 L CNN
F 1 "100nF" H 5565 6955 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 5488 6850 50  0001 C CNN
F 3 "~" H 5450 7000 50  0001 C CNN
	1    5450 7000
	1    0    0    -1  
$EndComp
Wire Wire Line
	5000 6550 5450 6550
Wire Wire Line
	5000 6850 5450 6850
Connection ~ 5450 6850
Wire Wire Line
	5000 7150 5450 7150
Connection ~ 5000 6550
Connection ~ 5000 7150
Wire Wire Line
	900  1450 900  1350
Wire Wire Line
	5050 1700 5050 1600
Wire Wire Line
	2050 6550 2050 6500
Wire Wire Line
	2450 7200 2450 7150
Wire Wire Line
	2450 6500 2450 6550
Wire Wire Line
	10500 3650 10500 3950
$Comp
L power:GNDPWR #PWR0121
U 1 1 5DF5B6A5
P 10700 5850
F 0 "#PWR0121" H 10700 5650 50  0001 C CNN
F 1 "GNDPWR" H 10704 5696 50  0000 C CNN
F 2 "" H 10700 5800 50  0001 C CNN
F 3 "" H 10700 5800 50  0001 C CNN
	1    10700 5850
	1    0    0    -1  
$EndComp
Wire Wire Line
	10150 5350 10500 5350
Text Label 1250 1150 0    50   ~ 0
Vref
$Comp
L Device:R R1
U 1 1 5DA82AAC
P 1700 1050
F 0 "R1" V 1600 1050 50  0000 C CNN
F 1 "100k" V 1800 1050 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 1630 1050 50  0001 C CNN
F 3 "~" H 1700 1050 50  0001 C CNN
	1    1700 1050
	0    1    1    0   
$EndComp
$Comp
L Device:R_POT RV1
U 1 1 5DA85282
P 2150 1050
F 0 "RV1" H 2081 1096 50  0000 R CNN
F 1 "10k" H 2081 1005 50  0000 R CNN
F 2 "Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical" H 2150 1050 50  0001 C CNN
F 3 "~" H 2150 1050 50  0001 C CNN
	1    2150 1050
	-1   0    0    -1  
$EndComp
Wire Wire Line
	2000 1050 1850 1050
$Comp
L Amplifier_Operational:TL072 U1
U 1 1 5DAA0858
P 2800 1450
F 0 "U1" H 2800 1250 50  0000 C CNN
F 1 "TL072" H 2850 1600 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 2750 1550 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 2850 1650 50  0001 C CNN
	1    2800 1450
	1    0    0    1   
$EndComp
Wire Wire Line
	2150 1200 2150 1350
Wire Wire Line
	2150 1350 2400 1350
$Comp
L power:GND #PWR0101
U 1 1 5DAE55E5
P 2150 1600
F 0 "#PWR0101" H 2150 1350 50  0001 C CNN
F 1 "GND" H 2155 1427 50  0000 C CNN
F 2 "" H 2150 1600 50  0001 C CNN
F 3 "" H 2150 1600 50  0001 C CNN
	1    2150 1600
	1    0    0    -1  
$EndComp
Wire Wire Line
	2150 1600 2150 1550
Wire Wire Line
	2150 1550 2500 1550
$Comp
L Device:R R6
U 1 1 5DB12D37
P 2800 1000
F 0 "R6" V 2700 1000 50  0000 C CNN
F 1 "100k" V 2900 1000 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 2730 1000 50  0001 C CNN
F 3 "~" H 2800 1000 50  0001 C CNN
	1    2800 1000
	0    1    1    0   
$EndComp
Wire Wire Line
	2650 1000 2400 1000
Wire Wire Line
	2400 1000 2400 1350
Connection ~ 2400 1350
Wire Wire Line
	2400 1350 2500 1350
Wire Wire Line
	3100 1450 3150 1450
Wire Wire Line
	3150 1450 3150 1200
Wire Wire Line
	3150 1000 2950 1000
$Comp
L Device:R R10
U 1 1 5DB2EFE7
P 3300 1200
F 0 "R10" V 3200 1200 50  0000 C CNN
F 1 "100k" V 3400 1200 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 3230 1200 50  0001 C CNN
F 3 "~" H 3300 1200 50  0001 C CNN
	1    3300 1200
	0    1    1    0   
$EndComp
$Comp
L Amplifier_Operational:TL072 U1
U 2 1 5DB46B9F
P 3900 1300
F 0 "U1" H 3900 1100 50  0000 C CNN
F 1 "TL072" H 3950 1450 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 3850 1400 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 3950 1500 50  0001 C CNN
	2    3900 1300
	1    0    0    1   
$EndComp
$Comp
L power:GND #PWR0111
U 1 1 5DB4F3C5
P 3500 1450
F 0 "#PWR0111" H 3500 1200 50  0001 C CNN
F 1 "GND" H 3505 1277 50  0000 C CNN
F 2 "" H 3500 1450 50  0001 C CNN
F 3 "" H 3500 1450 50  0001 C CNN
	1    3500 1450
	1    0    0    -1  
$EndComp
Wire Wire Line
	3500 1450 3500 1400
Wire Wire Line
	3500 1400 3600 1400
Wire Wire Line
	3600 1200 3500 1200
Connection ~ 3500 1200
Wire Wire Line
	3500 1200 3450 1200
$Comp
L Device:R R24
U 1 1 5DBDEB65
P 4450 1300
F 0 "R24" V 4243 1300 50  0000 C CNN
F 1 "330R" V 4334 1300 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal" V 4380 1300 50  0001 C CNN
F 3 "~" H 4450 1300 50  0001 C CNN
	1    4450 1300
	0    1    1    0   
$EndComp
Wire Wire Line
	4300 1300 4250 1300
$Comp
L Device:R R18
U 1 1 5DBECDD2
P 4400 650
F 0 "R18" V 4300 650 50  0000 C CNN
F 1 "100k" V 4500 650 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 4330 650 50  0001 C CNN
F 3 "~" H 4400 650 50  0001 C CNN
	1    4400 650 
	0    1    1    0   
$EndComp
Wire Wire Line
	4600 1300 4650 1300
Wire Wire Line
	4650 1300 4650 650 
$Comp
L Device:C C5
U 1 1 5DC08586
P 4100 900
F 0 "C5" V 4250 900 50  0000 C CNN
F 1 "18pF" V 3950 900 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm" H 4138 750 50  0001 C CNN
F 3 "~" H 4100 900 50  0001 C CNN
	1    4100 900 
	0    1    1    0   
$EndComp
Wire Wire Line
	4250 900  4250 1300
Connection ~ 4250 1300
Wire Wire Line
	4250 1300 4200 1300
Wire Wire Line
	4650 1300 4850 1300
Connection ~ 4650 1300
Connection ~ 3150 1200
Wire Wire Line
	3150 1200 3150 1000
Wire Wire Line
	3950 900  3500 900 
Connection ~ 3500 900 
Wire Wire Line
	3500 900  3500 1200
Wire Wire Line
	3500 650  4250 650 
Wire Wire Line
	4550 650  4650 650 
Wire Wire Line
	3500 650  3500 900 
Wire Wire Line
	3500 650  2150 650 
Wire Wire Line
	2150 650  2150 900 
Connection ~ 3500 650 
Wire Wire Line
	8100 1050 8100 1350
Wire Wire Line
	8100 1350 7350 1350
Wire Wire Line
	7350 1350 7350 1150
Wire Wire Line
	7350 1150 7400 1150
Connection ~ 8100 1050
Wire Wire Line
	8100 1050 8250 1050
Wire Wire Line
	7000 950  7400 950 
Connection ~ 7000 950 
Wire Wire Line
	10300 3350 10250 3350
$Comp
L attenuverter_mixer:AudioJack1_SwitchT J3
U 1 1 5E62B490
P 900 2500
F 0 "J3" H 932 2817 50  0000 C CNN
F 1 "Input" H 932 2726 50  0000 C CNN
F 2 "kicad_libraries:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles" H 900 2500 50  0001 C CNN
F 3 "~" H 900 2500 50  0001 C CNN
	1    900  2500
	1    0    0    -1  
$EndComp
Wire Wire Line
	1250 2600 1100 2600
Text Label 4550 2900 0    50   ~ 0
out_2
Wire Wire Line
	4550 2900 4850 2900
Wire Wire Line
	4850 2900 4850 2850
$Comp
L power:GNDPWR #PWR0112
U 1 1 5E62B49E
P 900 2900
F 0 "#PWR0112" H 900 2700 50  0001 C CNN
F 1 "GNDPWR" H 904 2746 50  0000 C CNN
F 2 "" H 900 2850 50  0001 C CNN
F 3 "" H 900 2850 50  0001 C CNN
	1    900  2900
	1    0    0    -1  
$EndComp
$Comp
L power:GNDPWR #PWR0114
U 1 1 5E62B4A8
P 5050 3150
F 0 "#PWR0114" H 5050 2950 50  0001 C CNN
F 1 "GNDPWR" H 5054 2996 50  0000 C CNN
F 2 "" H 5050 3100 50  0001 C CNN
F 3 "" H 5050 3100 50  0001 C CNN
	1    5050 3150
	1    0    0    -1  
$EndComp
Wire Wire Line
	1100 2500 1550 2500
$Comp
L attenuverter_mixer:AudioJack1_SwitchT J6
U 1 1 5E62B4B3
P 5050 2750
F 0 "J6" H 4870 2714 50  0000 R CNN
F 1 "Out" H 4870 2623 50  0000 R CNN
F 2 "kicad_libraries:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles" H 5050 2750 50  0001 C CNN
F 3 "~" H 5050 2750 50  0001 C CNN
	1    5050 2750
	-1   0    0    -1  
$EndComp
Wire Wire Line
	900  2900 900  2800
Wire Wire Line
	5050 3150 5050 3050
Text Label 1250 2600 0    50   ~ 0
Vref
$Comp
L Device:R R2
U 1 1 5E62B4C0
P 1700 2500
F 0 "R2" V 1600 2500 50  0000 C CNN
F 1 "100k" V 1800 2500 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 1630 2500 50  0001 C CNN
F 3 "~" H 1700 2500 50  0001 C CNN
	1    1700 2500
	0    1    1    0   
$EndComp
$Comp
L Device:R_POT RV2
U 1 1 5E62B4CA
P 2150 2500
F 0 "RV2" H 2081 2546 50  0000 R CNN
F 1 "10k" H 2081 2455 50  0000 R CNN
F 2 "Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical" H 2150 2500 50  0001 C CNN
F 3 "~" H 2150 2500 50  0001 C CNN
	1    2150 2500
	-1   0    0    -1  
$EndComp
Wire Wire Line
	2000 2500 1850 2500
$Comp
L Amplifier_Operational:TL072 U2
U 1 1 5E62B4D5
P 2800 2900
F 0 "U2" H 2800 2700 50  0000 C CNN
F 1 "TL072" H 2850 3050 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 2750 3000 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 2850 3100 50  0001 C CNN
	1    2800 2900
	1    0    0    1   
$EndComp
Wire Wire Line
	2150 2650 2150 2800
Wire Wire Line
	2150 2800 2400 2800
$Comp
L power:GND #PWR0116
U 1 1 5E62B4E1
P 2150 3050
F 0 "#PWR0116" H 2150 2800 50  0001 C CNN
F 1 "GND" H 2155 2877 50  0000 C CNN
F 2 "" H 2150 3050 50  0001 C CNN
F 3 "" H 2150 3050 50  0001 C CNN
	1    2150 3050
	1    0    0    -1  
$EndComp
Wire Wire Line
	2150 3050 2150 3000
Wire Wire Line
	2150 3000 2500 3000
$Comp
L Device:R R7
U 1 1 5E62B4ED
P 2800 2450
F 0 "R7" V 2700 2450 50  0000 C CNN
F 1 "100k" V 2900 2450 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 2730 2450 50  0001 C CNN
F 3 "~" H 2800 2450 50  0001 C CNN
	1    2800 2450
	0    1    1    0   
$EndComp
Wire Wire Line
	2650 2450 2400 2450
Wire Wire Line
	2400 2450 2400 2800
Connection ~ 2400 2800
Wire Wire Line
	2400 2800 2500 2800
Wire Wire Line
	3100 2900 3150 2900
Wire Wire Line
	3150 2900 3150 2650
Wire Wire Line
	3150 2450 2950 2450
$Comp
L Device:R R15
U 1 1 5E62B4FE
P 3300 2650
F 0 "R15" V 3200 2650 50  0000 C CNN
F 1 "100k" V 3400 2650 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 3230 2650 50  0001 C CNN
F 3 "~" H 3300 2650 50  0001 C CNN
	1    3300 2650
	0    1    1    0   
$EndComp
$Comp
L Amplifier_Operational:TL072 U2
U 2 1 5E62B508
P 3900 2750
F 0 "U2" H 3900 2550 50  0000 C CNN
F 1 "TL072" H 3950 2900 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 3850 2850 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 3950 2950 50  0001 C CNN
	2    3900 2750
	1    0    0    1   
$EndComp
$Comp
L power:GND #PWR0117
U 1 1 5E62B512
P 3500 2900
F 0 "#PWR0117" H 3500 2650 50  0001 C CNN
F 1 "GND" H 3505 2727 50  0000 C CNN
F 2 "" H 3500 2900 50  0001 C CNN
F 3 "" H 3500 2900 50  0001 C CNN
	1    3500 2900
	1    0    0    -1  
$EndComp
Wire Wire Line
	3500 2900 3500 2850
Wire Wire Line
	3500 2850 3600 2850
Wire Wire Line
	3600 2650 3500 2650
Connection ~ 3500 2650
Wire Wire Line
	3500 2650 3450 2650
$Comp
L Device:R R26
U 1 1 5E62B521
P 4450 2750
F 0 "R26" V 4243 2750 50  0000 C CNN
F 1 "330R" V 4334 2750 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal" V 4380 2750 50  0001 C CNN
F 3 "~" H 4450 2750 50  0001 C CNN
	1    4450 2750
	0    1    1    0   
$EndComp
Wire Wire Line
	4300 2750 4250 2750
$Comp
L Device:R R20
U 1 1 5E62B52C
P 4400 2100
F 0 "R20" V 4300 2100 50  0000 C CNN
F 1 "100k" V 4500 2100 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 4330 2100 50  0001 C CNN
F 3 "~" H 4400 2100 50  0001 C CNN
	1    4400 2100
	0    1    1    0   
$EndComp
Wire Wire Line
	4600 2750 4650 2750
Wire Wire Line
	4650 2750 4650 2100
$Comp
L Device:C C6
U 1 1 5E62B538
P 4100 2350
F 0 "C6" V 4250 2350 50  0000 C CNN
F 1 "18pF" V 3950 2350 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm" H 4138 2200 50  0001 C CNN
F 3 "~" H 4100 2350 50  0001 C CNN
	1    4100 2350
	0    1    1    0   
$EndComp
Wire Wire Line
	4250 2350 4250 2750
Connection ~ 4250 2750
Wire Wire Line
	4250 2750 4200 2750
Wire Wire Line
	4650 2750 4850 2750
Connection ~ 4650 2750
Connection ~ 3150 2650
Wire Wire Line
	3150 2650 3150 2450
Wire Wire Line
	3950 2350 3500 2350
Connection ~ 3500 2350
Wire Wire Line
	3500 2350 3500 2650
Wire Wire Line
	3500 2100 4250 2100
Wire Wire Line
	4550 2100 4650 2100
Wire Wire Line
	3500 2100 3500 2350
Wire Wire Line
	3500 2100 2150 2100
Wire Wire Line
	2150 2100 2150 2350
Connection ~ 3500 2100
$Comp
L attenuverter_mixer:AudioJack1_SwitchT J4
U 1 1 5E673264
P 900 3950
F 0 "J4" H 932 4267 50  0000 C CNN
F 1 "Input" H 932 4176 50  0000 C CNN
F 2 "kicad_libraries:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles" H 900 3950 50  0001 C CNN
F 3 "~" H 900 3950 50  0001 C CNN
	1    900  3950
	1    0    0    -1  
$EndComp
Wire Wire Line
	1250 4050 1100 4050
Text Label 4550 4350 0    50   ~ 0
out_3
Wire Wire Line
	4550 4350 4850 4350
Wire Wire Line
	4850 4350 4850 4300
$Comp
L power:GNDPWR #PWR0118
U 1 1 5E673272
P 900 4350
F 0 "#PWR0118" H 900 4150 50  0001 C CNN
F 1 "GNDPWR" H 904 4196 50  0000 C CNN
F 2 "" H 900 4300 50  0001 C CNN
F 3 "" H 900 4300 50  0001 C CNN
	1    900  4350
	1    0    0    -1  
$EndComp
$Comp
L power:GNDPWR #PWR0119
U 1 1 5E67327C
P 5050 4600
F 0 "#PWR0119" H 5050 4400 50  0001 C CNN
F 1 "GNDPWR" H 5054 4446 50  0000 C CNN
F 2 "" H 5050 4550 50  0001 C CNN
F 3 "" H 5050 4550 50  0001 C CNN
	1    5050 4600
	1    0    0    -1  
$EndComp
Wire Wire Line
	1100 3950 1550 3950
$Comp
L attenuverter_mixer:AudioJack1_SwitchT J7
U 1 1 5E673287
P 5050 4200
F 0 "J7" H 4870 4164 50  0000 R CNN
F 1 "Out" H 4870 4073 50  0000 R CNN
F 2 "kicad_libraries:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles" H 5050 4200 50  0001 C CNN
F 3 "~" H 5050 4200 50  0001 C CNN
	1    5050 4200
	-1   0    0    -1  
$EndComp
Wire Wire Line
	900  4350 900  4250
Wire Wire Line
	5050 4600 5050 4500
Text Label 1250 4050 0    50   ~ 0
Vref
$Comp
L Device:R R3
U 1 1 5E673294
P 1700 3950
F 0 "R3" V 1600 3950 50  0000 C CNN
F 1 "100k" V 1800 3950 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 1630 3950 50  0001 C CNN
F 3 "~" H 1700 3950 50  0001 C CNN
	1    1700 3950
	0    1    1    0   
$EndComp
$Comp
L Device:R_POT RV3
U 1 1 5E67329E
P 2150 3950
F 0 "RV3" H 2081 3996 50  0000 R CNN
F 1 "10k" H 2081 3905 50  0000 R CNN
F 2 "Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical" H 2150 3950 50  0001 C CNN
F 3 "~" H 2150 3950 50  0001 C CNN
	1    2150 3950
	-1   0    0    -1  
$EndComp
Wire Wire Line
	2000 3950 1850 3950
$Comp
L Amplifier_Operational:TL072 U3
U 1 1 5E6732A9
P 2800 4350
F 0 "U3" H 2800 4150 50  0000 C CNN
F 1 "TL072" H 2850 4500 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 2750 4450 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 2850 4550 50  0001 C CNN
	1    2800 4350
	1    0    0    1   
$EndComp
Wire Wire Line
	2150 4100 2150 4250
Wire Wire Line
	2150 4250 2400 4250
$Comp
L power:GND #PWR0123
U 1 1 5E6732B5
P 2150 4500
F 0 "#PWR0123" H 2150 4250 50  0001 C CNN
F 1 "GND" H 2155 4327 50  0000 C CNN
F 2 "" H 2150 4500 50  0001 C CNN
F 3 "" H 2150 4500 50  0001 C CNN
	1    2150 4500
	1    0    0    -1  
$EndComp
Wire Wire Line
	2150 4500 2150 4450
Wire Wire Line
	2150 4450 2500 4450
$Comp
L Device:R R8
U 1 1 5E6732C1
P 2800 3900
F 0 "R8" V 2700 3900 50  0000 C CNN
F 1 "100k" V 2900 3900 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 2730 3900 50  0001 C CNN
F 3 "~" H 2800 3900 50  0001 C CNN
	1    2800 3900
	0    1    1    0   
$EndComp
Wire Wire Line
	2650 3900 2400 3900
Wire Wire Line
	2400 3900 2400 4250
Connection ~ 2400 4250
Wire Wire Line
	2400 4250 2500 4250
Wire Wire Line
	3100 4350 3150 4350
Wire Wire Line
	3150 4350 3150 4100
Wire Wire Line
	3150 3900 2950 3900
$Comp
L Device:R R16
U 1 1 5E6732D2
P 3300 4100
F 0 "R16" V 3200 4100 50  0000 C CNN
F 1 "100k" V 3400 4100 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 3230 4100 50  0001 C CNN
F 3 "~" H 3300 4100 50  0001 C CNN
	1    3300 4100
	0    1    1    0   
$EndComp
$Comp
L Amplifier_Operational:TL072 U3
U 2 1 5E6732DC
P 3900 4200
F 0 "U3" H 3900 4000 50  0000 C CNN
F 1 "TL072" H 3950 4350 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 3850 4300 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 3950 4400 50  0001 C CNN
	2    3900 4200
	1    0    0    1   
$EndComp
$Comp
L power:GND #PWR0124
U 1 1 5E6732E6
P 3500 4350
F 0 "#PWR0124" H 3500 4100 50  0001 C CNN
F 1 "GND" H 3505 4177 50  0000 C CNN
F 2 "" H 3500 4350 50  0001 C CNN
F 3 "" H 3500 4350 50  0001 C CNN
	1    3500 4350
	1    0    0    -1  
$EndComp
Wire Wire Line
	3500 4350 3500 4300
Wire Wire Line
	3500 4300 3600 4300
Wire Wire Line
	3600 4100 3500 4100
Connection ~ 3500 4100
Wire Wire Line
	3500 4100 3450 4100
$Comp
L Device:R R27
U 1 1 5E6732F5
P 4450 4200
F 0 "R27" V 4243 4200 50  0000 C CNN
F 1 "330R" V 4334 4200 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal" V 4380 4200 50  0001 C CNN
F 3 "~" H 4450 4200 50  0001 C CNN
	1    4450 4200
	0    1    1    0   
$EndComp
Wire Wire Line
	4300 4200 4250 4200
$Comp
L Device:R R21
U 1 1 5E673300
P 4400 3550
F 0 "R21" V 4300 3550 50  0000 C CNN
F 1 "100k" V 4500 3550 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 4330 3550 50  0001 C CNN
F 3 "~" H 4400 3550 50  0001 C CNN
	1    4400 3550
	0    1    1    0   
$EndComp
Wire Wire Line
	4600 4200 4650 4200
Wire Wire Line
	4650 4200 4650 3550
$Comp
L Device:C C7
U 1 1 5E67330C
P 4100 3800
F 0 "C7" V 4250 3800 50  0000 C CNN
F 1 "18pF" V 3950 3800 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm" H 4138 3650 50  0001 C CNN
F 3 "~" H 4100 3800 50  0001 C CNN
	1    4100 3800
	0    1    1    0   
$EndComp
Wire Wire Line
	4250 3800 4250 4200
Connection ~ 4250 4200
Wire Wire Line
	4250 4200 4200 4200
Wire Wire Line
	4650 4200 4850 4200
Connection ~ 4650 4200
Connection ~ 3150 4100
Wire Wire Line
	3150 4100 3150 3900
Wire Wire Line
	3950 3800 3500 3800
Connection ~ 3500 3800
Wire Wire Line
	3500 3800 3500 4100
Wire Wire Line
	3500 3550 4250 3550
Wire Wire Line
	4550 3550 4650 3550
Wire Wire Line
	3500 3550 3500 3800
Wire Wire Line
	3500 3550 2150 3550
Wire Wire Line
	2150 3550 2150 3800
Connection ~ 3500 3550
$Comp
L attenuverter_mixer:AudioJack1_SwitchT J5
U 1 1 5E6DC622
P 900 5350
F 0 "J5" H 932 5667 50  0000 C CNN
F 1 "Input" H 932 5576 50  0000 C CNN
F 2 "kicad_libraries:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles" H 900 5350 50  0001 C CNN
F 3 "~" H 900 5350 50  0001 C CNN
	1    900  5350
	1    0    0    -1  
$EndComp
Wire Wire Line
	1250 5450 1100 5450
Text Label 4550 5750 0    50   ~ 0
out_4
Wire Wire Line
	4550 5750 4850 5750
Wire Wire Line
	4850 5750 4850 5700
$Comp
L power:GNDPWR #PWR0129
U 1 1 5E6DC630
P 900 5750
F 0 "#PWR0129" H 900 5550 50  0001 C CNN
F 1 "GNDPWR" H 904 5596 50  0000 C CNN
F 2 "" H 900 5700 50  0001 C CNN
F 3 "" H 900 5700 50  0001 C CNN
	1    900  5750
	1    0    0    -1  
$EndComp
$Comp
L power:GNDPWR #PWR0130
U 1 1 5E6DC63A
P 5050 6000
F 0 "#PWR0130" H 5050 5800 50  0001 C CNN
F 1 "GNDPWR" H 5054 5846 50  0000 C CNN
F 2 "" H 5050 5950 50  0001 C CNN
F 3 "" H 5050 5950 50  0001 C CNN
	1    5050 6000
	1    0    0    -1  
$EndComp
Wire Wire Line
	1100 5350 1550 5350
$Comp
L attenuverter_mixer:AudioJack1_SwitchT J8
U 1 1 5E6DC645
P 5050 5600
F 0 "J8" H 4870 5564 50  0000 R CNN
F 1 "Out" H 4870 5473 50  0000 R CNN
F 2 "kicad_libraries:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles" H 5050 5600 50  0001 C CNN
F 3 "~" H 5050 5600 50  0001 C CNN
	1    5050 5600
	-1   0    0    -1  
$EndComp
Wire Wire Line
	900  5750 900  5650
Wire Wire Line
	5050 6000 5050 5900
Text Label 1250 5450 0    50   ~ 0
Vref
$Comp
L Device:R R4
U 1 1 5E6DC652
P 1700 5350
F 0 "R4" V 1600 5350 50  0000 C CNN
F 1 "100k" V 1800 5350 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 1630 5350 50  0001 C CNN
F 3 "~" H 1700 5350 50  0001 C CNN
	1    1700 5350
	0    1    1    0   
$EndComp
$Comp
L Device:R_POT RV4
U 1 1 5E6DC65C
P 2150 5350
F 0 "RV4" H 2081 5396 50  0000 R CNN
F 1 "10k" H 2081 5305 50  0000 R CNN
F 2 "Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical" H 2150 5350 50  0001 C CNN
F 3 "~" H 2150 5350 50  0001 C CNN
	1    2150 5350
	-1   0    0    -1  
$EndComp
Wire Wire Line
	2000 5350 1850 5350
$Comp
L Amplifier_Operational:TL072 U4
U 1 1 5E6DC667
P 2800 5750
F 0 "U4" H 2800 5550 50  0000 C CNN
F 1 "TL072" H 2850 5900 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 2750 5850 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 2850 5950 50  0001 C CNN
	1    2800 5750
	1    0    0    1   
$EndComp
Wire Wire Line
	2150 5500 2150 5650
Wire Wire Line
	2150 5650 2400 5650
$Comp
L power:GND #PWR0131
U 1 1 5E6DC673
P 2150 5900
F 0 "#PWR0131" H 2150 5650 50  0001 C CNN
F 1 "GND" H 2155 5727 50  0000 C CNN
F 2 "" H 2150 5900 50  0001 C CNN
F 3 "" H 2150 5900 50  0001 C CNN
	1    2150 5900
	1    0    0    -1  
$EndComp
Wire Wire Line
	2150 5900 2150 5850
Wire Wire Line
	2150 5850 2500 5850
$Comp
L Device:R R9
U 1 1 5E6DC67F
P 2800 5300
F 0 "R9" V 2700 5300 50  0000 C CNN
F 1 "100k" V 2900 5300 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 2730 5300 50  0001 C CNN
F 3 "~" H 2800 5300 50  0001 C CNN
	1    2800 5300
	0    1    1    0   
$EndComp
Wire Wire Line
	2650 5300 2400 5300
Wire Wire Line
	2400 5300 2400 5650
Connection ~ 2400 5650
Wire Wire Line
	2400 5650 2500 5650
Wire Wire Line
	3100 5750 3150 5750
Wire Wire Line
	3150 5750 3150 5500
Wire Wire Line
	3150 5300 2950 5300
$Comp
L Device:R R17
U 1 1 5E6DC690
P 3300 5500
F 0 "R17" V 3200 5500 50  0000 C CNN
F 1 "100k" V 3400 5500 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 3230 5500 50  0001 C CNN
F 3 "~" H 3300 5500 50  0001 C CNN
	1    3300 5500
	0    1    1    0   
$EndComp
$Comp
L Amplifier_Operational:TL072 U4
U 2 1 5E6DC69A
P 3900 5600
F 0 "U4" H 3900 5400 50  0000 C CNN
F 1 "TL072" H 3950 5750 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 3850 5700 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 3950 5800 50  0001 C CNN
	2    3900 5600
	1    0    0    1   
$EndComp
$Comp
L power:GND #PWR0137
U 1 1 5E6DC6A4
P 3500 5750
F 0 "#PWR0137" H 3500 5500 50  0001 C CNN
F 1 "GND" H 3505 5577 50  0000 C CNN
F 2 "" H 3500 5750 50  0001 C CNN
F 3 "" H 3500 5750 50  0001 C CNN
	1    3500 5750
	1    0    0    -1  
$EndComp
Wire Wire Line
	3500 5750 3500 5700
Wire Wire Line
	3500 5700 3600 5700
Wire Wire Line
	3600 5500 3500 5500
Connection ~ 3500 5500
Wire Wire Line
	3500 5500 3450 5500
$Comp
L Device:R R28
U 1 1 5E6DC6B3
P 4450 5600
F 0 "R28" V 4243 5600 50  0000 C CNN
F 1 "330R" V 4334 5600 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal" V 4380 5600 50  0001 C CNN
F 3 "~" H 4450 5600 50  0001 C CNN
	1    4450 5600
	0    1    1    0   
$EndComp
Wire Wire Line
	4300 5600 4250 5600
$Comp
L Device:R R23
U 1 1 5E6DC6BE
P 4400 4950
F 0 "R23" V 4300 4950 50  0000 C CNN
F 1 "100k" V 4500 4950 50  0000 C CNN
F 2 "Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder" V 4330 4950 50  0001 C CNN
F 3 "~" H 4400 4950 50  0001 C CNN
	1    4400 4950
	0    1    1    0   
$EndComp
Wire Wire Line
	4600 5600 4650 5600
Wire Wire Line
	4650 5600 4650 4950
$Comp
L Device:C C10
U 1 1 5E6DC6CA
P 4100 5200
F 0 "C10" V 4250 5200 50  0000 C CNN
F 1 "18pF" V 3950 5200 50  0000 C CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm" H 4138 5050 50  0001 C CNN
F 3 "~" H 4100 5200 50  0001 C CNN
	1    4100 5200
	0    1    1    0   
$EndComp
Wire Wire Line
	4250 5200 4250 5600
Connection ~ 4250 5600
Wire Wire Line
	4250 5600 4200 5600
Wire Wire Line
	4650 5600 4850 5600
Connection ~ 4650 5600
Connection ~ 3150 5500
Wire Wire Line
	3150 5500 3150 5300
Wire Wire Line
	3950 5200 3500 5200
Connection ~ 3500 5200
Wire Wire Line
	3500 5200 3500 5500
Wire Wire Line
	3500 4950 4250 4950
Wire Wire Line
	4550 4950 4650 4950
Wire Wire Line
	3500 4950 3500 5200
Wire Wire Line
	3500 4950 2150 4950
Wire Wire Line
	2150 4950 2150 5200
Connection ~ 3500 4950
Wire Wire Line
	7150 3350 7150 4150
Wire Wire Line
	7950 3550 7950 4150
Wire Wire Line
	9600 2850 9800 2850
Connection ~ 9600 2850
Wire Wire Line
	10100 2850 10250 2850
Wire Wire Line
	10250 2850 10250 3350
Connection ~ 10250 3350
Wire Wire Line
	10250 3350 10150 3350
Wire Wire Line
	9200 3350 9600 3350
Wire Wire Line
	8500 2850 9600 2850
$Comp
L Device:C C14
U 1 1 5EAB8EE5
P 5900 6700
F 0 "C14" H 6015 6746 50  0000 L CNN
F 1 "100nF" H 6015 6655 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 5938 6550 50  0001 C CNN
F 3 "~" H 5900 6700 50  0001 C CNN
	1    5900 6700
	1    0    0    -1  
$EndComp
$Comp
L Device:C C17
U 1 1 5EAB8EEF
P 5900 7000
F 0 "C17" H 6015 7046 50  0000 L CNN
F 1 "100nF" H 6015 6955 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 5938 6850 50  0001 C CNN
F 3 "~" H 5900 7000 50  0001 C CNN
	1    5900 7000
	1    0    0    -1  
$EndComp
Wire Wire Line
	5450 6550 5900 6550
Wire Wire Line
	5450 6850 5900 6850
Connection ~ 5900 6850
Wire Wire Line
	5450 7150 5900 7150
Connection ~ 5450 6550
Connection ~ 5450 7150
$EndSCHEMATC