Abstract
This paper presents a CMOS sensor array with a 768 low-noise recording sites for neural recording with 2048 intercalated angle-sensitive pixels for optical read-out. The array is highly scalable because of electrode-level digitization with serial data stream-out. The front-end amplifiers use chopping to reduce flicker noise and achieve an input-referred noise of 4.1 μ V rms over a 3.6 kHz bandwidth while occupying an area of only 800 μm2. Digitization is performed using a distributed ramp ADC that samples every sensor site at 10 kHz. The electrodes have a 50 μ m pitch and are plated with platinum to increase the interface capacitance and ensure biocompatibility. The sensor array is used to refocus a lenless image and to record neural spiking and local field potentials from a mouse olfactory bulb slice.
Original language | English |
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Article number | 6527330 |
Pages (from-to) | 3211-3218 |
Number of pages | 8 |
Journal | IEEE Sensors Journal |
Volume | 13 |
Issue number | 9 |
DOIs | |
State | Published - 2013 |
Keywords
- Action potential
- angle-sensitive pixel (ASP)
- CMOS sensors
- local field potential
- low-noise amplifiers
- microelectrode array (MEA)
- microelectrodes
- neural interface