Compact Continuous Time Common-­Mode Feedback Circuit for Low-­Power, Area-­Constrained Neural Recording Amplifiers

Title
Compact Continuous Time Common-­Mode Feedback Circuit for Low-­Power, Area-­Constrained Neural Recording Amplifiers
Authors
곽준영박성윤
Keywords
common-mode feedback; folded-cascode operational transconductance amplif; multichannel neural recordings
Issue Date
2021-01
Publisher
Electronics
Citation
VOL 10, NO 2, 145
Abstract
A continuous-time common-mode feedback (CMFB) circuit for low-power, area-constrained neural recording amplifiers is proposed. The proposed CMFB circuit is compact; it can be realized by simply replacing passive components with transistors in a low-noise folded cascode operational transconductance amplifier (FC-OTA) that is one of the most widely adopted OTAs for neural recording amplifiers. The proposed CMFB also consumes no additional power, i.e., no separate CMFB amplifier is required, thus, it fits well to low-power, area-constrained multichannel neural recording amplifiers. The proposed CMFB is analyzed in the implementation of a fully differential AC-coupled neural recording amplifier and compared with that of an identical neural recording amplifier using a conventional differential difference amplifier-based CMFB in 0.18 ?m CMOS technology post-layout simulations. The AC-coupled neural recording amplifier with the proposed CMFB occupies ~37% less area and consumes ~11% smaller power, providing 2.67× larger output common mode (CM) range without CM bandwidth sacrifice in the comparison.
URI
http://pubs.kist.re.kr/handle/201004/72730
ISSN
2079-9292
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE