Two multichannel integrated circuits for neural recording and signal processing.
We have developed, manufactured, and tested two analog CMOS integrated circuit "neurochips" for recording from arrays of densely packed neural electrodes. Device A is a 16-channel buffer consisting of parallel noninverting amplifiers with a gain of 2 V/V. Device B is a 16-channel two-stage analog signal processor with differential amplification and high-pass filtering. It features selectable gains of 250 and 500 V/V as well as reference channel selection. The resulting amplifiers on Device A had a mean gain of 1.99 V/V with an equivalent input noise of 10 microV(rms). Those on Device B had mean gains of 53.4 and 47.4 dB with a high-pass filter pole at 211 Hz and an equivalent input noise of 4.4 microV(rms). Both devices were tested in vivo with electrode arrays implanted in the somatosensory cortex.
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Related Subject Headings
- Somatosensory Cortex
- Semiconductors
- Rats
- Quality Control
- Pilot Projects
- Neurons
- Miniaturization
- Haplorhini
- Feasibility Studies
- Equipment Design
Citation
Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Somatosensory Cortex
- Semiconductors
- Rats
- Quality Control
- Pilot Projects
- Neurons
- Miniaturization
- Haplorhini
- Feasibility Studies
- Equipment Design