PMID-17554826[0] A fully integrated mixed-signal neural processor for implantable multichannel cortical recording.
- document is rich in details! looks pretty well designed, too.
- Michigan 3-d electrodes
- inductively powered, 2Mbps output
- 64 channels
- 18b/spike for 64 channels in scan mode, continuous waveforms on 2 channels in monitor mode
- programmable analog spike detection. resolution: 5 bits.
- no timestamps - send them out as they come in, with a clock rate fast enough so that this does not matter.
- temporary storage in SRAM
- time compression and buffering is somewhat complex (?)
- only transmit threshold crossings, positive, negative, and both.
- they do not detail how the signal is telemetered - perhaps this is for another publication.
- fabricated chip occupies 3.5 x 2.7 mm. 0.5um process.
- fabricated chip has a power of 200uw @ 1.8V. that's 6.4mW altogether! I need to get down to this figure! (well..)
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