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Analysis and Research of CMOS Chopper Stabilized Amplifiers
/ s! K4 y a' m/ r8 CYANGYin-tang ,HEBin ,ZHU Zhang-ming* K5 D% O) l- Z8 y2 s0 x8 Z5 `7 R
(Microelectronics Institute ,Xidian University ,Xi’an 7 1 00 7 1 ,China)+ Q4 |' E8 r5 y; g: y9 V. j4 e4 G4 T) n
Abstract :This paper introduces the differences of several offset canceling techniques .Thenmodulation
% y$ L0 L! E+ uprincipal of chopper stabilized amplifiers and the effects on their gains of the chopper frequency and the5 z6 ?0 _/ d1 J+ _( V! o
phase shift are detailed .The values ofmodulated noise and offset are analyzed and implementation of) P, g- s7 ?" } E" m
the chopper modulators given .Several techniques to reduce the residual offset are proposed .At last ,
& Y$ G F9 m x! v/ _7 Usome latest research findings and some new products utilizing chopper stabilization technique are given$ P( y* I9 F: {1 _
.Also some of the flaws and advantages of chopper stabilization technique and application fields of
( }+ k) L. k7 }6 |, z4 e' jchopper stabilized amplifiers are stated .
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[ 本帖最後由 sjhor 於 2007-5-19 05:11 PM 編輯 ] |
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