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Analysis and Research of CMOS Chopper Stabilized Amplifiers% X) J; Z! b x5 I3 _
YANGYin-tang ,HEBin ,ZHU Zhang-ming
$ {5 d7 S' J* E" C0 R" n(Microelectronics Institute ,Xidian University ,Xi’an 7 1 00 7 1 ,China)
6 d7 a3 b* c( i) P8 SAbstract :This paper introduces the differences of several offset canceling techniques .Thenmodulation+ o J$ Z+ [3 r7 v8 {# {5 |
principal of chopper stabilized amplifiers and the effects on their gains of the chopper frequency and the" v W9 ~( I7 t: r) e
phase shift are detailed .The values ofmodulated noise and offset are analyzed and implementation of
; C e' w8 G2 z% Z% pthe chopper modulators given .Several techniques to reduce the residual offset are proposed .At last ,
, K( d3 \8 l9 \4 {8 o0 }; e4 Bsome latest research findings and some new products utilizing chopper stabilization technique are given. B3 n* }: y W
.Also some of the flaws and advantages of chopper stabilization technique and application fields of
+ R+ v) }9 k8 k3 \$ m# fchopper stabilized amplifiers are stated .
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: Z: U0 @- ^$ \+ K: e[ 本帖最後由 sjhor 於 2007-5-19 05:11 PM 編輯 ] |
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