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A High Performance CMOS Operational Amplifier Implemented with
$ d/ S5 N9 Z0 U+ d& NFeedforward Compensation Technology
5 x( U" r; G# W6 }9 [0 MFUYong-chao ,YANGYin-tang , ZHUZhang-ming , ZHULei
5 S; Y) S9 u, {$ @- G, V(Microelectronics Institute ,XidianUniversity,Xi’an 710071 , China)2 B. f& H3 `# }! T' \
Abstract : A high performance CMOS folded - cascoded operational amplifier with high open loop gain and low input
3 ?+ T) d; Q) {% voffset voltage is presented on the basis of the analysis and summary of traditional folded-cascoded circuits .The design is) W7 u+ D: ]* L6 ]$ H- {
implemented in a standard 0.35μmCMOSmixed-signal process and simulatedwithHspice .The simulated results of the
4 Z3 ?- r c" ]: Noperational amplifier provide the DCopen loop gain with 95 dBand input offset voltagewith 0.023 mV,otherwisewith a
( m: _6 { c+ I" @# g7 R2 pF load capacity the phasemargin is 45.5°: _1 } U# R- p/ |
& |8 v' } `5 n& G D6 I8 _2 x$ t: _3 R
摘要:基于��CMOS 折�共源共��算放大器的分析和��,�用前���技�,��了一种高性能CMOS 折�2 l) v- F8 l0 ^: L. E& |5 U
共源共��算放大器,不�保�了高��增益,而且�大大�小了�放的�入失���。��采用TSMC 0.35 μm
! A: M3 G! q3 K- Q4 F$ \混合信�CMOS 工���,采用Hspice �行仿真,仿真�果表明�放的直流��增益�95 dB ,�入失����. s$ W, L% l( a" S4 k- F- ?
0.023 mV,���容�2 pF �的相位裕度�45.5°。
+ E/ l7 Z5 I* k; W/ ?% m$ E4 L4 I
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) p( M5 b- U" |2 m' {. i[ 本帖最後由 sjhor 於 2007-5-15 09:00 PM 編輯 ] |
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