This is a DC amplifier, done in Kicad and simulated by Kicad's SPICE simulator (Kicad >= 5.1.10).
- The TL084 is a quad op amp, but Kicad does not manage multiple parts during a SPICE simulation. Therefore, an extra SUBCKT (here TL084-quad.lib) has to be manually done in order to comply.
- All parts of the TL084 have to be placed on the schematic, in case putting dummy ground or 1M resistors on the unsed parts.
- All parts of the TL084, including part "E" (the power supply pins) must be set to the TL084-quad.lib SPICE model file.
- There is no need to specificy an alternate pin sequence for each part of the TL084 in the model properties, because the TL084-quad.lib extra SUBCKT already specifies the correct full pinout (according the the TL084 datasheet).