基于Wilson电流镜的精密压控电流源

櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶ICDesignandApplicationDOI10.3969/j.issn.1003－353x.2011.12.0099403612201112Wilson430062Wilson。WilsonBJTbipolarjunctiontransistors、。。CBcomplementarybipolar。。WilsonTM919TN710A1003－353X201112－0940－04PrecisionVoltageControlledCurrentSourceBasedonWilsonCurrentMirrorsZhaoBaishuMaoChuanwuLiLingweiYuLiuyuFacultyofPhysicsandElectronicsHubeiUniversityWuhan430062ChinaAbstractViathecombinationofpositiveandnegativeWilsoncurrentmirrorsthecurrentflowingintopowerterminalofvoltagefollowercomposedofoperationalamplifiercanbegotten．Thenthehigh-precisionvoltagecontrolledcurrentsourcecanbeobtained．ThecharacteristicofcurrentfollowingcausedbythecombinationofcomplementaryWilsoncurrentmirrorswasstudiedthroughsimulation．WiththeexperimentaltestcircuitconsistsofageneralintegratedoperationalamplifieranddiscreteBJTbipolarjunctiontransistorstheexperimentalresultsoftheprecisionofvoltagecontrolledcurrentsourceandthecharacteristicoffrequencyresponseweregiven．Circuitbandwidthismuchbetterthantheunitgainbandwidthofoperationalamplifierwhichshowsthedominancesofcurrent-modecircuit．whenusingCBcomplementarybipolarprocesstoimplementmonolithicintegrationthecircuit’spropertieswillbebetter．Severalimprovementprogramsaboutcircuithavebeengiven．Theexperimentsprovedthattheprogramsarepractical．KeywordsWilsoncurrentmirrorvoltagecontrolledcurrentsourceinstrumentationamplifiercurrent-modevoltagefollowerEEACC12000。。WilsonWilsonBJTbipolarjunctiontransistors、。Wilson櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶December2011SemiconductorTechnologyVol.36No.129411WilsonWilson11。1WilsonFig.1CombinationofcomplementaryWilsoncurrentmirrorsQ1Q2Q3I1Q4Q5Q6I2。Q1Q2、Q4Q5ILI1I2IL=I1－I211ILILVCC=ILRL+2VEC2VCCRLVEC。VEC0.7V2I1I2RLIL2。1I1I2RLMultisimIL1%。EarlyI1I2I1I2。1RLTab.1RL'srangeI1/mA0.040.400.404.005.006.007.008.009.0010.012.015.020.0I2/mA0.010.350.303.003.003.003.003.003.003.003.003.003.00Rlmax/kΩ415.0247.5139.013.407.1004.6753.5752.8502.3752.1001.6001.3000.85022。I0ICC1－ICC2=I03ICC1ICC2。2LM7411%。I0100μA～20mAI03。2Fig.2VoltagefollowerWilson櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶94236122011122I0Tab.2RelationshipbetweencurrentflowingintopowerterminaloperationalamplifierandoutputcurrentI0ICC1/mA0.200.601.401.501.751.852.002.302.502.973.504.004.505.008.5015.020.0ICC2/mA0.100.100.500.500.450.450.450.430.410.400.380.380.380.400.400.400.40I0/mA0.100.500.900.981.281.401.551.822.052.553.103.564.104.608.1014.619.631、212I1=ICC1I2=ICC23。IL=ICC1－ICC2=I04I0=ui/RuiRIL=ui/R53Fig.3High-precisionvoltage-controlledcurrentsource5R。3Wilson。110kΩ2。3343R=RL。670kHz。CB4－5。4Fig.4Frequencyresponsecurveofvoltagecontrolledcurrentsource3Tab.3Experimentaldatasofvoltage-controlledcurrentsourceI0/mA0.521.011.032.013.023.987.609.1010.312.015.1IL/mA0.52－0.521.01－1.011.02－1.022.01－2.003.02－3.003.98－3.967.60－7.589.10－9.0710.3－10.312.0－11.915.0－14.9RL/kΩ0－1.000－1.000－1.000－1.000－1.000－1.000－1.000－1.000－1.000－1.000－1.0044.13Wilson、、。Wilson3Wilson。35。3Wilson。Wilson櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶櫶December2011SemiconductorTechnologyVol.36No.12943。。。5Fig.5Voltage-controlledcurrentsourcecomposedbyFETcurrentmirrors4.23。Wilson6。“”“”2、3IL=Ii6Ii。6。6Fig.6Currentfollower5Wilson。Wilson3①、、、②3uiui。1QAUWELJOSSIEVRPQIUXZetal．High-speedactive-inputcascadecurrentMirrorJ．ElecLett2006423128－130．2LUOPLIZJYULetal．AnovelhighoutputresistancecurrentsourcebasedonnegativeresistanceJ．ChineseJournalofSemiconductors2006273443－447．3ZHANGGBLIUJJOHNSONDKetal．Anaccuratecurrentsourcewithon-chipself-calibrationcircuitsforlow-voltagecurrent-modedifferentialdriversJ．IEEETransCirsandSyst-IRegularPapers200653140－47．4．J．2006364498－501．5YINGJHFANGCZHANGJY．DesignoftemperatureindependentcurrentreferencebasedonsuperpositiontechnologyJ．Microelectronics＆Com-puter2008253114－118．2011－6－241959—、、1990—、。