A rail-to-rail ping-pong op-amp

A rail-to-rail ping-pong op-amp achieves offset cancellation and 1/f noise reduction without folding of the input spectrum. The clocking scheme minimizes the clock feedthrough and the residual offset due to charge injection. With a clock frequency of 100 kHz, the residual offset is less than 100 /sp...

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Bibliographic Details
Published inIEEE journal of solid-state circuits Vol. 31; no. 9; pp. 1320 - 1324
Main Authors Opris, I.E., Kovacs, G.T.A.
Format Journal Article
LanguageEnglish
Published IEEE 01.09.1996
Subjects
Capacitors
Circuits
Clocks
Frequency
MOS devices
Noise reduction
Nonlinear distortion
Operational amplifiers
Switches
Transconductance
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Summary:A rail-to-rail ping-pong op-amp achieves offset cancellation and 1/f noise reduction without folding of the input spectrum. The clocking scheme minimizes the clock feedthrough and the residual offset due to charge injection. With a clock frequency of 100 kHz, the residual offset is less than 100 /spl mu/V, and the input referred noise is about 225 nV/Hz/sup 1/2/. The rail-to-rail distortion at 1 kHz is lower than -71 dB. The total silicon area is 610/spl times/420 /spl mu/m/sup 2/, and the circuit dissipates 1.5 mW from a single 5 V supply.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9200
1558-173X
DOI:10.1109/4.535417