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Analysis and Research of CMOS Chopper Stabilized Amplifiers# y$ ^1 X) K) i/ c
YANGYin-tang ,HEBin ,ZHU Zhang-ming
$ J5 @! ~9 W# _4 u7 K4 T2 I% F8 S(Microelectronics Institute ,Xidian University ,Xi’an 7 1 00 7 1 ,China)
3 D' g, w2 [' A4 ~4 |: bAbstract :This paper introduces the differences of several offset canceling techniques .Thenmodulation
& e( h9 E- ~/ n# Uprincipal of chopper stabilized amplifiers and the effects on their gains of the chopper frequency and the1 [" C+ S/ r" _+ H, C
phase shift are detailed .The values ofmodulated noise and offset are analyzed and implementation of# `: ?- y9 C0 B9 v
the chopper modulators given .Several techniques to reduce the residual offset are proposed .At last ,
( z1 W) Z# ^/ J3 rsome latest research findings and some new products utilizing chopper stabilization technique are given% t* f; S; V" f: b
.Also some of the flaws and advantages of chopper stabilization technique and application fields of) G7 \# ]7 l5 R2 Y' c
chopper stabilized amplifiers are stated .' x7 a/ R A+ C. k2 Z$ Y
' U* e7 H. l: {0 N% k回覆後 可以下載PDF附件 權限10 & 2RDB
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1 Z* `) r) m1 p- K$ e! Z& N# |. ?[ 本帖最後由 sjhor 於 2007-5-19 05:11 PM 編輯 ] |
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