DocumentCode
902426
Title
A CMOS chopper amplifier
Author
Enz, Christian C. ; Vittoz, Eric A. ; Krummenacher, François
Volume
22
Issue
3
fYear
1987
fDate
6/1/1987 12:00:00 AM
Firstpage
335
Lastpage
342
Abstract
A highly sensitive CMOS chopper amplifier for low-frequency applications is described. It is realized with a second-order low-pass selective amplifier using a continuous-time filtering technique. The circuit has been integrated in a 3-μm p-well CMOS technology. The chopper amplifier DC grain is 38 dB with a 200-Hz bandwidth. The equivalent input noise is 63 nV/√Hz and free from 1/f noise. The input offset is below 5 μV for a tuning error less than 1%. The amplifier consumes only 34 μW.
Keywords
Amplifiers; CMOS integrated circuits; Choppers (circuits); amplifiers; choppers (circuits); Bandwidth; CMOS technology; Choppers; Circuit noise; Energy consumption; Frequency; Low-frequency noise; Low-noise amplifiers; Noise level; Phase noise;
fLanguage
English
Journal_Title
Solid-State Circuits, IEEE Journal of
Publisher
ieee
ISSN
0018-9200
Type
jour
DOI
10.1109/JSSC.1987.1052730
Filename
1052730
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