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A High Performance CMOS Operational Amplifier Implemented with% Y/ b4 r; N& R1 i
Feedforward Compensation Technology
! {% n( u5 |6 n3 l4 XFUYong-chao ,YANGYin-tang , ZHUZhang-ming , ZHULei
0 }7 o% P6 V9 T5 M$ Y9 C: S; u(Microelectronics Institute ,XidianUniversity,Xi’an 710071 , China)2 L4 \. ]: X* \$ V& r
Abstract : A high performance CMOS folded - cascoded operational amplifier with high open loop gain and low input: S8 {* v& h+ {/ k8 u$ _5 |+ W! V
offset voltage is presented on the basis of the analysis and summary of traditional folded-cascoded circuits .The design is3 M9 i, y+ p1 J: Q0 g+ [2 w, B% y
implemented in a standard 0.35μmCMOSmixed-signal process and simulatedwithHspice .The simulated results of the
, E0 y7 O8 }4 m6 M! ~operational amplifier provide the DCopen loop gain with 95 dBand input offset voltagewith 0.023 mV,otherwisewith a1 J: Q% z5 r3 F8 a
2 pF load capacity the phasemargin is 45.5°6 L% A2 w. t V) o7 q/ v' U3 x
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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�1 F' q( [7 J; D1 E$ H* |
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 μm6 \) [3 U2 |) I! ?, b3 ]
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����
3 G1 F# ^, G/ G( @0 \0.023 mV,���容�2 pF �的相位裕度�45.5°。6 a: E' x7 m- {( M
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" u, x# } Q2 X7 w" b: M, s* c# `[ 本帖最後由 sjhor 於 2007-5-15 09:00 PM 編輯 ] |
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