Add voltage conversion equations to Neuropixels DataFrame docs #367
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jonnew
commented
Nov 5, 2024
jonnew
commented
- Fixes Add sample to voltage conversion equations to neuropixels data frames #358
| /// 384 electrodes (rows) acquired at 30 kHz (columns). Each sample is a 14-bit, offset binary value | ||
| /// encoded as a <see cref="ushort"/>. To convert to microvolts, the following equation can be used: | ||
| /// <code> | ||
| /// V_electrode (uV) = 0.91553 uV × (ADC result – 8192) |
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The equation I've been using is 1/80/pow(2,14)*1e6 = 0.7629 uV
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That makes sense, not sure where I got my number from tbh.
| /// 384 electrodes (rows) acquired at 30 kHz (columns). Each sample is a 12-bit, offset binary value | ||
| /// encoded as a <see cref="ushort"/>. To convert to microvolts, the following equation can be used: | ||
| /// <code> | ||
| /// V_electrode (uV) = 2.44141 uV × (ADC result – 2048) |
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See above...
1/80/pow(2,12)*1e6 = 3.05176 uV
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Volts per bit should be exactly 4x higher than for the beta probes
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I get the 4x thing (14->12 bit) but I see this on the data sheet:
is it 80 or 100 for the public version?
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This on latest brochure as well
https://www.neuropixels.org/_files/ugd/328966_2b39661f072d405b8d284c3c73588bc6.pdf
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I was confused about that as well – but I confirmed that there is exactly a 4x difference by putting beta and commercial probes in the same saline bath
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hey y'all. Just commenting to bring attention to this PR for the purpose of accurately populating this page: |
