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Analysis and Research of CMOS Chopper Stabilized Amplifiers
% u! {" l) b$ A0 a% {% hYANGYin-tang ,HEBin ,ZHU Zhang-ming5 @1 e/ N" \7 x# l! w5 p1 x
(Microelectronics Institute ,Xidian University ,Xi’an 7 1 00 7 1 ,China)
$ c! \: I7 p8 V5 u6 ^8 B* }Abstract :This paper introduces the differences of several offset canceling techniques .Thenmodulation) g6 i: H0 G; u; x8 C: l6 P
principal of chopper stabilized amplifiers and the effects on their gains of the chopper frequency and the7 B3 r/ N* f j- p) N* E
phase shift are detailed .The values ofmodulated noise and offset are analyzed and implementation of
4 H4 t5 ^+ D' vthe chopper modulators given .Several techniques to reduce the residual offset are proposed .At last ,
; O% X9 ]! ]. b6 Y: Ysome latest research findings and some new products utilizing chopper stabilization technique are given
% w, J( r& V, F# Y- f5 i.Also some of the flaws and advantages of chopper stabilization technique and application fields of. n4 R. O* q2 ~3 q2 f9 g. J
chopper stabilized amplifiers are stated .
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3 z9 ` \* W/ L C4 \[ 本帖最後由 sjhor 於 2007-5-19 05:11 PM 編輯 ] |
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