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A High Performance CMOS Operational Amplifier Implemented with7 n. Y# m+ R( ]0 ]0 V4 O1 Z0 t) H
Feedforward Compensation Technology
" C+ Y9 O5 j" ?) UFUYong-chao ,YANGYin-tang , ZHUZhang-ming , ZHULei) D! {* J: F6 Z5 B6 d; B% t
(Microelectronics Institute ,XidianUniversity,Xi’an 710071 , China)
) R$ {, U* H& K1 R1 TAbstract : A high performance CMOS folded - cascoded operational amplifier with high open loop gain and low input" z" L) N" R. A8 \' N% W
offset voltage is presented on the basis of the analysis and summary of traditional folded-cascoded circuits .The design is4 W) }5 R; }7 r8 I& {
implemented in a standard 0.35μmCMOSmixed-signal process and simulatedwithHspice .The simulated results of the
7 Y. [' u/ i8 @- R3 ^operational amplifier provide the DCopen loop gain with 95 dBand input offset voltagewith 0.023 mV,otherwisewith a
2 f" ^! Z7 U Y- p2 pF load capacity the phasemargin is 45.5°& r" l Z4 Y$ J, L2 C) G+ D
2 _7 Z$ y) C1 S# E$ y* i, p- I7 V7 D8 M0 O
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�
" R W6 O$ e8 g, J/ s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$ z' t _7 V3 H
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, `5 g: H" G2 r' `5 q W
0.023 mV,���容�2 pF �的相位裕度�45.5°。
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[ 本帖最後由 sjhor 於 2007-5-15 09:00 PM 編輯 ] |
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