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Analysis and Research of CMOS Chopper Stabilized Amplifiers5 V1 q: ~" P8 c9 v
YANGYin-tang ,HEBin ,ZHU Zhang-ming
- K! n# i, F3 V0 C4 J* [: X(Microelectronics Institute ,Xidian University ,Xi’an 7 1 00 7 1 ,China)1 H& i3 ]/ U# } C
Abstract :This paper introduces the differences of several offset canceling techniques .Thenmodulation
# z7 V/ T0 j" S! k: {+ oprincipal of chopper stabilized amplifiers and the effects on their gains of the chopper frequency and the
# Z% b! O! G' G8 X7 i, n- pphase shift are detailed .The values ofmodulated noise and offset are analyzed and implementation of
1 e: F$ w8 r4 hthe chopper modulators given .Several techniques to reduce the residual offset are proposed .At last ,: o/ y8 z5 p* ~
some latest research findings and some new products utilizing chopper stabilization technique are given7 G+ S8 K, U7 L. A% w
.Also some of the flaws and advantages of chopper stabilization technique and application fields of* e/ x! l5 Q9 [4 i' {6 B B% m- V8 r
chopper stabilized amplifiers are stated ." y6 L9 @* k) d/ V2 s
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[ 本帖最後由 sjhor 於 2007-5-19 05:11 PM 編輯 ] |
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