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A High Performance CMOS Operational Amplifier Implemented with0 G- A) [4 R( E- b2 H/ z2 I7 b
Feedforward Compensation Technology2 n; l$ w/ i2 f; |8 i! a' X
FUYong-chao ,YANGYin-tang , ZHUZhang-ming , ZHULei; y+ F8 }4 }: F/ T# h
(Microelectronics Institute ,XidianUniversity,Xi’an 710071 , China)
2 C$ V+ x8 I& k5 b5 Z7 DAbstract : A high performance CMOS folded - cascoded operational amplifier with high open loop gain and low input* Z( N) X1 U6 l5 N
offset voltage is presented on the basis of the analysis and summary of traditional folded-cascoded circuits .The design is
$ ?7 E, N$ [# Z k+ D q% E9 dimplemented in a standard 0.35μmCMOSmixed-signal process and simulatedwithHspice .The simulated results of the
6 s, x* l# u$ c) c U! toperational amplifier provide the DCopen loop gain with 95 dBand input offset voltagewith 0.023 mV,otherwisewith a' R0 O( S, S: ~4 c: m8 v& N
2 pF load capacity the phasemargin is 45.5°) h3 D6 X. } K$ e( t; N6 C
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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�, g* k3 Z/ D2 h. e& l
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
# F, n- r7 M2 l+ j6 J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����
+ j R5 U& v' e, J7 V9 B8 N9 W0.023 mV,���容�2 pF �的相位裕度�45.5°。
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7 ]- I k+ I9 p8 H[ 本帖最後由 sjhor 於 2007-5-15 09:00 PM 編輯 ] |
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