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A High Performance CMOS Operational Amplifier Implemented with5 j2 @& S% C/ }9 ?0 G6 r/ n
Feedforward Compensation Technology
; s4 r: ]/ |9 q" p$ }/ o0 H m. oFUYong-chao ,YANGYin-tang , ZHUZhang-ming , ZHULei/ l, o% T1 i6 G7 j( I
(Microelectronics Institute ,XidianUniversity,Xi’an 710071 , China)8 ^0 U% a7 q3 M. m7 F0 O' ?# G
Abstract : A high performance CMOS folded - cascoded operational amplifier with high open loop gain and low input
2 u0 K1 U# |. A3 x% goffset voltage is presented on the basis of the analysis and summary of traditional folded-cascoded circuits .The design is
; C0 V) }; N2 X9 Y% V9 a7 _implemented in a standard 0.35μmCMOSmixed-signal process and simulatedwithHspice .The simulated results of the
* T9 `$ ^1 N" o# z3 Uoperational amplifier provide the DCopen loop gain with 95 dBand input offset voltagewith 0.023 mV,otherwisewith a3 d6 B' ~ l8 ^7 Q! V' y
2 pF load capacity the phasemargin is 45.5°4 ~& B+ m2 i+ t" h) n6 ]: z
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# A0 O; M O& J8 @# @1 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�
) v" B5 @- V( u8 e6 ?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
! [; G2 d3 |, @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����
G0 K9 j6 ^% W6 R. I- F9 a& p0.023 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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