实验要求：采用所学过的运放结构，设计一运放要求满足下列指标：VDD=3.0V，低频电压增益大于70dB，单位增益带宽大于100MHz，最小相位裕度45度，运放负载电容最小CL=5pF。对功耗、输出电压摆幅不作要求，输入共模范围自定，电路中的偏置电压可以直接用直流电压源给定，晶体管最小长度L为0.5um，最小宽度为lum。二、实验环境：HSPICE模拟仿真软件，请自行安装。三、参考设计：下面是所设计的折叠共源共栅电路参考图，其中M12和M13是共模反馈电路。GL四口个eoenENXBDAAAE023+0VDO0M7MBEPMOSPMOSbM9M10PMOSPMOSNMOSMO5p6PMGMoNMOSM3M4NMOSM12M130048AC10C1itran0200n.0.0.1n-acdec20101000MegRdnKeSnm该电路的SPICE仿真程序如下：*folding cascadeop-amplifier simulationM1N006inpN004N004NMOSI=xxxuW=xxxuM2N005innN004N004NMOS1=xxxuw=xxxuM3N002vb5N0010NMOSl=2uw=xxxuM4N003vb5N0010NMOS1=2uw=xxxuM5outnvb4N0020NMOS1=2uw=xxxuM6outpvb4N0030NMOS1-2uw=xxxuM9outnvb3N006VDDPMOSI=2uw=xxxuM10outpvb3N005VDDPMOS1=2uw=xxxuM7N006vb2VDDVDDPMOS1=2uW=xxxuM8N005vb2VDDVDDPMOS1=2uW=xxxu
一、实验要求： 采用所学过的运放结构，设计一运放要求满足下列指标：VDD=3.0V，低频电 压增益大于 70dB，单位增益带宽大于 100MHz，最小相位裕度 45 度，运放负载 电容最小 CL=5pF。对功耗、输出电压摆幅不作要求，输入共模范围自定，电路 中的偏置电压可以直接用直流电压源给定，晶体管最小长度 L 为 0.5um，最小宽 度为 1um。 二、实验环境： HSPICE 模拟仿真软件，请自行安装。 三、参考设计： 下面是所设计的折叠共源共栅电路参考图，其中 M12 和 M13 是共模反馈电路。 该电路的 SPICE 仿真程序如下： * folding cascade op-amplifier simulation M1 N006 inp N004 N004 NMOS l=xxxu w=xxxu M2 N005 inn N004 N004 NMOS l=xxxu w=xxxu M3 N002 vb5 N001 0 NMOS l=2u w=xxxu M4 N003 vb5 N001 0 NMOS l=2u w=xxxu M5 outn vb4 N002 0 NMOS l=2u w=xxxu M6 outp vb4 N003 0 NMOS l=2u w=xxxu M9 outn vb3 N006 VDD PMOS l=2u w=xxxu M10 outp vb3 N005 VDD PMOS l=2u w=xxxu M7 N006 vb2 VDD VDD PMOS l=2u w=xxxu M8 N005 vb2 VDD VDD PMOS l=2u w=xxxu
M11N004vb100NMOSI=1uw=xxxu* Common mode feed backM12N001outn00NMOSI=0.5uw=xxxuM13N001outp00NMOS1=0.5uw=xxxu* common voltage parameter-param vdm=0V1VDD03.0C1outp015pC2 outn 015pV2 vb1 00.8V3 vb2 0 1.9V4 vb301.55V5 vb4 0 1.1V6vb500.88* DC analysis voltage source and transient analysis voltage sourceV7inpVcmdc vdm SIN(O0.00011000000 00)AC1V8Vcminndc vdm SIN(O0.0001100000 00 0)V9 Vcm01.32.model nmos nmos LEVEL=1 VTO=0.7GAMMA=0.45 PHI=0.9+NSUB=9e+14LD=0.08e-6UO=350LAMBDA=0.1+TOX=9e-9PB=0.9CJ=0.56e-3CJSW=0.35e-11MJ=0.455MJSW=0.2CGDO=0.4e-9JS=1.0e-8+.modelpmospmosLEVEL=1VTO=-0.8GAMMA=0.4PHI=0.8+NSUB=5e+14LD=0.09e-6UO=1000LAMBDA=0.2+TOX=9e-9PB=0.9CJ=0.94e-3CJSW=0.32e-11+MJ=0.5MJSW=0.33CGDO=0.3e-9JS=0.5E-8* the option line is important, please copy this line if you use hspice.optionPOST ACCTNOMODACCURATElistACOUT=0.op*large signal differential mode sweep.dc vdm-110.001.tran5n100uOn.acdec10102G*outputwaveformforACandtransientanalysis-probe vdb(outp,outn)vp(outp,outn)-probe id(M11), id(M1), id(M3), id(M5), id(M7), id(M9), vm(outp,outn), vm(inp,inn).end
M11 N004 vb1 0 0 NMOS l=1u w=xxxu * Common mode feed back M12 N001 outn 0 0 NMOS l=0.5u w=xxxu M13 N001 outp 0 0 NMOS l=0.5u w=xxxu * common voltage parameter .param vdm=0 V1 VDD 0 3.0 C1 outp 0 15p C2 outn 0 15p V2 vb1 0 0.8 V3 vb2 0 1.9 V4 vb3 0 1.55 V5 vb4 0 1.1 V6 vb5 0 0.88 * DC analysis voltage source and transient analysis voltage source V7 inp Vcm dc vdm SIN(0 0.0001 100000 0 0 0) AC 1 V8 Vcm inn dc vdm SIN(0 0.0001 100000 0 0 0) V9 Vcm 0 1.32 .model nmos nmos LEVEL=1 VTO=0.7 GAMMA=0.45 PHI=0.9 + NSUB=9e+14 LD=0.08e-6 UO=350 LAMBDA=0.1 + TOX=9e-9 PB=0.9 CJ=0.56e-3 CJSW=0.35e-11 + MJ=0.45 MJSW=0.2 CGDO=0.4e-9 JS=1.0e-8 .model pmos pmos LEVEL=1 VTO=-0.8 GAMMA=0.4 PHI=0.8 + NSUB=5e+14 LD=0.09e-6 UO=100 LAMBDA=0.2 + TOX=9e-9 PB=0.9 CJ=0.94e-3 CJSW=0.32e-11 + MJ=0.5 MJSW=0.3 CGDO=0.3e-9 JS=0.5E-8 * the option line is important, please copy this line if you use hspice .option POST ACCT NOMOD ACCURATE list ACOUT=0 .op * large signal differential mode sweep .dc vdm -1 1 0.001 .tran 5n 100u 0n .ac dec 10 10 2G * output waveform for AC and transient analysis .probe vdb(outp,outn) vp(outp,outn) .probe id(M11), id(M1), id(M3), id(M5), id(M7), id(M9), vm(outp,outn), vm(inp,inn) .end
参考结果：低频增益78dB，相位阈度45.7度，单位增益带宽125MHz，输入信号100kHz时的增益为64dB。B010X800TENFont SOTEOVEH
参考结果：低频增益 78dB，相位阈度 45.7 度，单位增益带宽 125MHz，输入信号 100kHz 时的增益为 64dB