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Analysis and Research of CMOS Chopper Stabilized Amplifiers
5 h) m" `4 ~, F0 V- e; z0 k0 h7 wYANGYin-tang ,HEBin ,ZHU Zhang-ming7 I4 I, `% S) E
(Microelectronics Institute ,Xidian University ,Xi’an 7 1 00 7 1 ,China)* w6 o1 i( N+ r7 R" H
Abstract :This paper introduces the differences of several offset canceling techniques .Thenmodulation
$ f& i6 H4 z, a1 d# i! qprincipal of chopper stabilized amplifiers and the effects on their gains of the chopper frequency and the
3 b; ]) G% C/ d- k+ _/ N7 Bphase shift are detailed .The values ofmodulated noise and offset are analyzed and implementation of9 B% J% D0 J* s
the chopper modulators given .Several techniques to reduce the residual offset are proposed .At last ,; y+ M6 ~6 X) U# V3 d3 O
some latest research findings and some new products utilizing chopper stabilization technique are given
+ s( g/ r6 L$ j& M/ E; M.Also some of the flaws and advantages of chopper stabilization technique and application fields of
/ a- `; O: k. `. j# t8 s5 ^chopper stabilized amplifiers are stated .
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: i8 h5 C# o5 D1 N- p1 Q[ 本帖最後由 sjhor 於 2007-5-19 05:11 PM 編輯 ] |
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