IEEE-1185151 (pdf) Two multichannel integrated circuits for neural recording and signal processing
- pretty basic, nothing tricky. Actually, they are rather scarce with the details -- Morizio?
- all 16 capacitors are placed off chip; on chip capacitors are only 950e-18 F/um^2 or 0.001pF/um^2 in the process they use.
- designs with this circuit topology were rejected for noise concerns, as they would require resistors as large as 10G for to realize gain and filter cutoff.
- and yet Reid's chips seem to be working fine without external capcitors ...
- have variable gain (but not AGC).
- 5uV RMS input noise; 3.5uV for the plexon headstage.
____References____
Obeid, I. and Morizio, J.C. and Moxon, K.A. and Nicolelis, M.A.L. and Wolf, P.D. Two multichannel integrated circuits for neural recording and signal processing Biomedical Engineering, IEEE Transactions on 50 2 255 -258 (2003) |