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A High Performance CMOS Operational Amplifier Implemented with$ }1 e* v4 W& B, D1 g* ]# B
Feedforward Compensation Technology2 I4 i: j9 i. D
FUYong-chao ,YANGYin-tang , ZHUZhang-ming , ZHULei# U, M( k, ]9 t' O0 x) m" d
(Microelectronics Institute ,XidianUniversity,Xi’an 710071 , China)
D" V" S4 `. {* y! s& bAbstract : A high performance CMOS folded - cascoded operational amplifier with high open loop gain and low input2 r, L- Q4 f! U. Z! l' O! ^
offset voltage is presented on the basis of the analysis and summary of traditional folded-cascoded circuits .The design is
4 ^+ Z+ A" b2 Yimplemented in a standard 0.35μmCMOSmixed-signal process and simulatedwithHspice .The simulated results of the
. e7 B; l* f+ x4 l, [9 p! q4 B, xoperational amplifier provide the DCopen loop gain with 95 dBand input offset voltagewith 0.023 mV,otherwisewith a- A5 r# k) R* X x- B" k
2 pF load capacity the phasemargin is 45.5°/ R K. N1 S/ i( J, A
. [0 ?% r, ~8 S Z4 U- ~
' I4 f1 q9 l4 s2 b" I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�
: K! F% M ]# L* J- t' A7 Q5 G9 P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 μm2 a/ B% w6 E& k: _: p' P
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����2 h* l# Z8 B: x8 x1 m9 ]' V% M
0.023 mV,���容�2 pF �的相位裕度�45.5°。
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3 P' K6 p/ E- H2 }7 S f: y[ 本帖最後由 sjhor 於 2007-5-15 09:00 PM 編輯 ] |
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