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A High Performance CMOS Operational Amplifier Implemented with
! @$ M2 i. @ M4 L, @Feedforward Compensation Technology
2 v& }+ E7 O# `& N3 oFUYong-chao ,YANGYin-tang , ZHUZhang-ming , ZHULei5 c3 F% V$ m+ t
(Microelectronics Institute ,XidianUniversity,Xi’an 710071 , China)
; c7 ]7 m* B8 zAbstract : A high performance CMOS folded - cascoded operational amplifier with high open loop gain and low input
; M- ?! n4 @$ P1 _/ J, E6 Noffset voltage is presented on the basis of the analysis and summary of traditional folded-cascoded circuits .The design is
7 S1 F9 X) ^7 q: x2 Limplemented in a standard 0.35μmCMOSmixed-signal process and simulatedwithHspice .The simulated results of the0 q* @9 |) s0 M9 s' r& u9 [/ Q) [0 }
operational amplifier provide the DCopen loop gain with 95 dBand input offset voltagewith 0.023 mV,otherwisewith a+ ~7 c$ Y5 z$ r0 F+ j( u* Z
2 pF load capacity the phasemargin is 45.5°
* t1 M% z) Y0 P) x/ s5 I0 }2 O' r
* M, Z/ W, g e; y0 l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 Y4 L! m7 C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
* g5 f% e6 S7 N4 H' k, H7 M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����
1 D6 @. R3 E) F& k' t0.023 mV,���容�2 pF �的相位裕度�45.5°。 ]. Q/ K% `: P9 r' e5 K0 @
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2 a6 M6 z# U. f: S8 m: F* n8 x! w& `) Z5 x2 |$ _
[ 本帖最後由 sjhor 於 2007-5-15 09:00 PM 編輯 ] |
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