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Analysis and Research of CMOS Chopper Stabilized Amplifiers5 g R* N9 f0 ]( u
YANGYin-tang ,HEBin ,ZHU Zhang-ming
9 n, u- b% ^$ p(Microelectronics Institute ,Xidian University ,Xi’an 7 1 00 7 1 ,China)' B$ e H6 G+ z8 |2 U
Abstract :This paper introduces the differences of several offset canceling techniques .Thenmodulation0 U! X5 a* {) t7 O9 ?+ ~0 O# \' J
principal of chopper stabilized amplifiers and the effects on their gains of the chopper frequency and the/ d i, l: ^0 n4 n& B
phase shift are detailed .The values ofmodulated noise and offset are analyzed and implementation of- Z& f: B* }9 s" s
the chopper modulators given .Several techniques to reduce the residual offset are proposed .At last ,
; ?* P+ _: T- X% t' }some latest research findings and some new products utilizing chopper stabilization technique are given7 ^# t1 Q1 f% w8 f4 `+ H& H
.Also some of the flaws and advantages of chopper stabilization technique and application fields of
( {9 O" T7 b6 n# x8 D ^chopper stabilized amplifiers are stated .
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& j( S0 n4 p& e; x2 N2 D[ 本帖最後由 sjhor 於 2007-5-19 05:11 PM 編輯 ] |
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