DocumentCode
1205491
Title
An Ultra-Low Drift Amplifier Using a New Type of Series-Shunt MOSFET Chopper
Author
Abe, Minoru ; Sugisaki, Iwao ; Nakazoe, Jun ; Abe, Zenmon
Issue
1
fYear
1985
fDate
3/1/1985 12:00:00 AM
Firstpage
54
Lastpage
58
Abstract
A chopper amplifier of a new type is proposed for the amplification of nanovolt-order dc voltage. The chopper is built by connecting a shunt switch, which is driven at twice the chopper frequency, to the output terminals of a conventional and balanced-type series-shunt MOSFET chopper. The present chopper is free from offset voltage arising from spike voltages and has an input voltage offset temperature coefficient of less than 0.1 nV/??C for a signal source of less than 1 k??, and a long-term drift of 2 nV/18 h for signal source resistance of 6.1 ??.
Keywords
Apertures; Charge coupled devices; Charge-coupled image sensors; Choppers; Frequency measurement; MOSFET circuits; Particle measurements; Switches; System testing; Voltage;
fLanguage
English
Journal_Title
Instrumentation and Measurement, IEEE Transactions on
Publisher
ieee
ISSN
0018-9456
Type
jour
DOI
10.1109/TIM.1985.4315256
Filename
4315256
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