Cart (Loading....) | Create Account
Close category search window

A micro-power low-noise auto-zeroing CMOS amplifier for cortical neural prostheses

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
Chiu-Hsien Chan ; Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA ; Wills, J. ; LaCoss, J. ; Granacki, J.J.
more authors

A novel architecture to realize a low-power, low-noise amplifier for cortical neural prostheses is presented. The design consists of a low-noise variable gain amplifier as the first stage, a low-Gm high-pass filter as the second stage, and a low-pass Gm-C amplifier as the last stage. Discrete-time autozeroing is utilized to reduce the offset and noise. The bandwidth and autozeroing frequency of the amplifier is optimized to reduce noise folding. A current division technique is utilized to achieve a low-Gm OTA (Operational Transconductance Amplifier) so that low frequency operation is realized without any external capacitors. All the input pair transistors are biased in sub-threshold operation to reduce power consumption. A cross-couple parallel pair of source degeneration transistors is employed to increase the linearity crucial to neural spike detection. This design achieves variable gain from 470 (55 dB) to 1. In a CMOS 0.18 um process with 1.8 V power supply, the total circuit occupies 0.245 mm2 with 26 uW power consumption and 1.8 kHz bandwidth. Total harmonic distortion is less than 1%, while input noise is 4.24 uVrms within the band of interest.

Published in:

Biomedical Circuits and Systems Conference, 2006. BioCAS 2006. IEEE

Date of Conference:

Nov. 29 2006-Dec. 1 2006

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.