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Analysis and Research of CMOS Chopper Stabilized Amplifiers
2 ~$ Q+ W5 i. J& b7 GYANGYin-tang ,HEBin ,ZHU Zhang-ming- L. h4 Z5 l9 Z! d9 F2 V) u
(Microelectronics Institute ,Xidian University ,Xi’an 7 1 00 7 1 ,China)
5 o' |8 X6 U# Z" Q" n CAbstract :This paper introduces the differences of several offset canceling techniques .Thenmodulation; J+ F/ m. z$ y; ]+ x3 z; z
principal of chopper stabilized amplifiers and the effects on their gains of the chopper frequency and the7 z. k1 O0 ^8 x N( A
phase shift are detailed .The values ofmodulated noise and offset are analyzed and implementation of
/ L8 d. q' [) b) X ithe chopper modulators given .Several techniques to reduce the residual offset are proposed .At last ,
m4 n/ C f8 }; X$ @/ Z' O' W+ @some latest research findings and some new products utilizing chopper stabilization technique are given: N8 E* q- r+ A( w3 j, Q: g1 y
.Also some of the flaws and advantages of chopper stabilization technique and application fields of
/ N" o* M' Y) f, K8 Bchopper stabilized amplifiers are stated .
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( a& [; j& Q: h2 x+ D[ 本帖最後由 sjhor 於 2007-5-19 05:11 PM 編輯 ] |
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