集成运算放大器主要参数测试方法

052005-11-6(5G24fc(7Hz)AOVOSIBIOSridrOCMRRPSRRPcf0SRtsAOCMRR105~108IOSpA(IEC)3-6-33-6-3A2A1AO2≥80dBVICM2A1(±10V)VOM2≥10VR150~100Ω()1000=+=FIIRRRFR1=50ΩR250kΩR’18052005-11-6R’’=R10kΩA1A2R2C21VOSlVI1VI2=0()S1S2S4S33-6-4R1IOSR1IOS10.1µAVOSR1=R1•IOS1=5µVVOSmVA1A2AOAO1•AO2VOS2AO1VOS2VOS1AOAf=1(R2R1)11221OSOVRRV⎟⎟⎠⎞⎜⎜⎝⎛+=VOS2=1VVOS11mV3-6-4VOS2IOS1VI1VI2=0S1S2S4S3112'21OSOVRRV⋅⎟⎟⎠⎞⎜⎜⎝⎛+=S1S2(3-6-5)VO2’’)(11112''2RIVRRVOSOSO+⎟⎟⎠⎞⎜⎜⎝⎛+=R=R’=R’’VO2’VO2’’⎟⎟⎠⎞⎜⎜⎝⎛+−=12'2''211RRRVVIOOOS28052005-11-63-6-5IOS3IBVI1VI2=0S2S4S1S3VO2’()RIVRRVBOSO−+⎟⎟⎠⎞⎜⎜⎝⎛+=112'21S2S1VO2’’VI-≈VI+RIVRRRVBOSO+−=−⎟⎟⎠⎞⎜⎜⎝⎛+1211'2()RIVRRVBOSO+−⎟⎟⎠⎞⎜⎜⎝⎛+=112'21IB=1/2IB-+IB+VO2’VO2’’()+−+⎟⎟⎠⎞⎜⎜⎝⎛+=−BBOOIIRRRVV12''2'21⎟⎟⎠⎞⎜⎜⎝⎛+−=12''2'212RRRVVIOOB4AO1rOS1S2S4S3VI1=0VI2VI2=VI2’VO2’⎟⎟⎠⎞⎜⎜⎝⎛++⎟⎟⎠⎞⎜⎜⎝⎛+−=121121'2'211RRVRRAVVOSOIOVI2VI2’’VO2’’⎟⎟⎠⎞⎜⎜⎝⎛++⎟⎟⎠⎞⎜⎜⎝⎛+−=121121''2''211RRVRRAVVOSOIO38052005-11-6112''2'2'2''21)(OIIOOARRVVVV⎟⎟⎠⎞⎜⎜⎝⎛+⋅−=−'2''212''2'211)(OOIIOVVRRVVA−⎟⎟⎠⎞⎜⎜⎝⎛+−=±VI2’±VI2’’VO1AO1S3RLAO1’AO1AO1’1221'OOOARrRA+='12'11)(OOOoARAAr−=5AOMS1S2S3S4VI1=0RLTVT+VOMVT-VOM6ridS1S2S3S43-6-6vI1=0vI2=V’I2VO2’3-6-6⎟⎟⎠⎞⎜⎜⎝⎛+−⎟⎟⎠⎞⎜⎜⎝⎛+++≈idOOSOSIdrRRRRRVRIVV221211'2111'2'11'212IIdOIOIdVVAVVV−=−=⎪⎭⎪⎬⎫⎪⎩⎪⎨⎧−⎥⎦⎤⎢⎣⎡⎟⎟⎠⎞⎜⎜⎝⎛+−⎟⎟⎠⎞⎜⎜⎝⎛+++=='21211'211222'2221IOidOOSOSOIdOOVArRRRRRVRIVAVAVvI2=V’’I2⎪⎭⎪⎬⎫⎪⎩⎪⎨⎧−⎥⎦⎤⎢⎣⎡⎟⎟⎠⎞⎜⎜⎝⎛+−⎟⎟⎠⎞⎜⎜⎝⎛+++=''21211''2112'2221IOidOOSOSOOVArRRRRRVRIVAV1/AO2≈0()()()idOidIIOOrArRRRVVVV112'2''2''2'22/1++−=−48052005-11-6rid()()()()()12'2''2'2''2112'2''2/1/12RRVVVVARRVVRrIIIOOIIid+−−−+−=3-6-6rid7CMRRS1S2S4S3VI2=0VI1=VI1’VO2’VI1=VI1’’VO2’’⎟⎟⎠⎞⎜⎜⎝⎛+−=∆211''2'21)(RRRVVVOOId''1'11IIIcVVV−=∆11COAACMRR=ACl211''2'2''1'1111111)(//RRRVVVVVVVVVVCMRROOIIIdIcIcCIdO+−−=∂∂=∂∂∂∂=±VI1’±VI1’’CMRR8ric58052005-11-63-6-7ricCMRRric3-6-71'''''''1IicicIdVRrRRrRV⎟⎟⎠⎞⎜⎜⎝⎛+−+=+−ric-ric+R’R’’1'''1IicicIdVrRrRV⎟⎟⎠⎞⎜⎜⎝⎛−≈+−R’=0''''11RCMRRRVVrIdIic⋅==+R’’=0''11RCMRRRVVrIdIic⋅==−R’R’’9PSRRS1S2S4S3vI1=vI2=0+VCC’VO2’+VCC’’VO2’’CCIdVVPSRR∂∂=1∂VId1∂VId1=|VO2’-VO2’’|[R1/R1+R2]∂VCC∂VCC=|+VCC’-+VCC’’|)()('''211''2'2CCCCOOVVRRRVVPSRR+−+⎟⎟⎠⎞⎜⎜⎝⎛+⋅−=68052005-11-6-VEE-VEEPSRRCMRRA1A2(3.2.18)R’1R’2R’’1R2’’R’1R’’13-6-3R1R’2R2’’TR2CMRR1CMRRCMRRl04(80dB)0.0013-6-8CMRR()3-6-8CMRR3-6-81A1A2A1A2R1R22A1+VCC=+15V-VEE=-15VA130V0V()(1)+VCC=+20V-VEE=-10VA1+5V(2)+VCC=+10V-VEE=-20VA1-5VA1+5V-5VA110VVIcA1VO13-1-6A1CMRRVVIcId='3R2A2A1A2VI+=VI-A2PA1'2122IcOIVRRRVV=+⋅=+(4)A1A2VIA1A1+VCC=+20V-VEE=-10VVI=-5VVO2VO2’+VCC=+10V-VEE=-20VVI=+5VVO2’’A1R278052005-11-6⎟⎟⎠⎞⎜⎜⎝⎛+=⎟⎟⎠⎞⎜⎜⎝⎛+=−2121''2''211RRCMRRVRRVVVIcIdOO211'02''2)(RRRVVVCMRROIc+−=3-6-8VIC=10V|VO2’’-VO2’|=1V312101≈+RRCMRR=104(3.6.1)VIc’(121RR+)PSRRCMRR106(120dB)CMRR88