A 110dB-CMRR 100dB-PSRR multi-channel neural-recording amplifier system using differentially regulated rejection ratio enhancement in 0.18μm CMOS

Sehwan Lee, Arup K. George, Taeju Lee, Jun Uk Chu, Sungmin Han, Ji Hoon Kim, Minkyu Je, Junghyup Lee

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

17 Scopus citations

Abstract

Multi-channel neural-recording amplifier systems have evolved into the method of choice for analyzing neurophysiological behavior, and are leading to a deeper understanding of the human brain [1-4]. Such systems operate from a noisy supply and ground, especially when they are powered wirelessly. As shown in Fig. 29.7.1, the amplifiers ought to be low-noise, low-power, and resilient against environmental noise and interferences that are capacitively coupled from the power lines (220V/60Hz). Specifications-wise, these requirements translate into high CMRR, TCMRR, and PSRR. TCMRR (total CMRR) is a more realistic specification than CMRR as it includes the effect of the impedances of both electrodes (Ze) and the amplifier input (ZCin) as well. In fact, the TCMRR should be >70dB for reliable detection of a 5μVrms neural signal [1].

Original languageEnglish
Title of host publication2018 IEEE International Solid-State Circuits Conference, ISSCC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages472-474
Number of pages3
ISBN (Electronic)9781509049394
DOIs
StatePublished - 8 Mar 2018
Event65th IEEE International Solid-State Circuits Conference, ISSCC 2018 - San Francisco, United States
Duration: 11 Feb 201815 Feb 2018

Publication series

NameDigest of Technical Papers - IEEE International Solid-State Circuits Conference
Volume61
ISSN (Print)0193-6530

Conference

Conference65th IEEE International Solid-State Circuits Conference, ISSCC 2018
Country/TerritoryUnited States
CitySan Francisco
Period11/02/1815/02/18

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