An 8-channel fully differential analog front-end for neural recording

An 8-channel, analog front-end chip for neural recording is presented in this paper. The chip consists of eight neural recording amplifiers with tunable bandwidth and gain, eight 4th-order Bessel switch capacitor filters, an 8-to-1 analog time-division multiplexer, a fully differential successive ap...

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Bibliographic Details
Main Authors: Yun Gui, Xu Zhang, Yuan Wang, Sanyuan Chen, Beiju Huang, Weihua Pei, Hongda Chen, Kai Liang, Suibiao Huang, Bo Wang, Zhaohui Wu, Bin Li
Format: Conference Proceeding
Language:English
Subjects:
Arrays
Capacitors
Cutoff frequency
Electronics packaging
Noise
Resistors
Time division multiplexing
Online Access:Request full text
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Summary:An 8-channel, analog front-end chip for neural recording is presented in this paper. The chip consists of eight neural recording amplifiers with tunable bandwidth and gain, eight 4th-order Bessel switch capacitor filters, an 8-to-1 analog time-division multiplexer, a fully differential successive approximation (SAR) analog-to-digital converter (ADC), and a serial peripheral interface for communication. The neural recording amplifier presents a programmable gain from 53 dB to 68 dB, a tunable low cut-off frequency from 0.1 Hz to several hundred Hz, and 3.77 μV rms referred noise. The SAR ADC digitizes signals at maximum sampling rate of 20 kS/s per channel and achieves an ENOB of 7.4. The chip is designed and fabricated in 0.18-μm CMOS process. We successfully performed simultaneous multi-channel recording in vitro experiment using the neural recording chip.
ISSN:2163-4025
2766-4465
DOI:10.1109/BioCAS.2012.6418402