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A High Performance CMOS Operational Amplifier Implemented with
) d8 G3 k3 t. b6 fFeedforward Compensation Technology
. y1 q$ ~3 x! ~6 cFUYong-chao ,YANGYin-tang , ZHUZhang-ming , ZHULei
% N1 t- X* o3 B5 [2 ^2 B f! U0 L(Microelectronics Institute ,XidianUniversity,Xi’an 710071 , China)! z8 G6 P! W6 V& C, ~
Abstract : A high performance CMOS folded - cascoded operational amplifier with high open loop gain and low input
0 o( ]9 A Y/ o- Moffset voltage is presented on the basis of the analysis and summary of traditional folded-cascoded circuits .The design is
6 n9 [% S. [, w1 G& fimplemented in a standard 0.35μmCMOSmixed-signal process and simulatedwithHspice .The simulated results of the
9 @0 [7 E, u/ x/ ^$ K6 z+ Foperational amplifier provide the DCopen loop gain with 95 dBand input offset voltagewith 0.023 mV,otherwisewith a; v( B7 `& `* T* _/ t- D9 O* }) t2 t
2 pF load capacity the phasemargin is 45.5°8 [4 t0 g% v7 C( U( k+ ~' E
* h" o: _% [9 ~& N3 ^* }, M% \6 M9 _5 w
3 d `8 ~2 i4 T J7 k0 e& m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�, a+ G K3 S8 [, M8 s4 N/ m
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" `' e9 n! }0 A4 Y
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����. d5 A* n8 B" Z4 u' l
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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