DLPCA-200低噪音电流放大器可通过RS232接口远程控制,工作方式有高速模式和低噪声模式,增益从1*103-1*1011可调,带宽***高为500KHZTransimpedanceGainfrom103to1011V/AInputNoisedownto4.3fA/√HzBandwidthupto500kHzRiseTimedownto700nsAdjustableBiasVoltageManualandRemoteControl9级可变增益：10三次方~10的十一次方V/A,超低噪声可达4fA/(Hz)1/2,带宽DC-500khz,可调偏置和Bios,可变交流直流耦合，10Hz低通滤波方便直流测量，数字电脑界面或者远程控制，适用于光电二极管，扫描隧道显微镜、粒子探测器、锁相放大的前级放大、AD转换TheUltimateLowNoiseCurrentAmplifierPackedwithfeaturestheDLPCA-200variablegaintransimpedanceamplifierisdesignedforawiderangeofapplicati***thatrequiretheconversionof***allcurrentsintousablevoltages.Itisideallysuited,forexample,fortimeresolvedcurrentandchargemeasurementsdowntotheμsregionandaspreamplifierforphotodiodesorlock-insystems.TheDLPCA-200offersvariabletransimpedancegainfrom103to1011V/Aallowingthesensitivemeasurementofcurrentsinthesub-picotomilliamprange.ItsswitchableAC/DCcoupling,10Hzlowpassfilterandadjustableoffsetcontrolcanbeusedtoadapttheamplifiertovaryingmeasurementtasksandsignalconditi***.Anadjustablebiasvoltageconnectedtotheshieldoftheinputsocketisprovidedtooptimizethespeedandnoiseperformanceofexternalphotodiodesconnectedtotheamplifierinput.Allfuncti***canbeseteithermanuallybyswitchesorthroughtheopto-isolatedinterfacebyremotecontrol.AllthisinaruggedandcompactEMIshieldedcasedesignedwiththeuserinmindandbuilttoguaranteetrouble-freeoperationeveninveryroughandnoisyenvironments.BandwidthandFrequencyResp***eIndependentofSourceCapacitanceUnlikeotheramplifiers***ailabletheDLPCA-200requiresnoparticularadaptationsuchasfrequencycompensationfordifferentsources.Thegainstaysc***tantandthefrequencyresp***eisnicelyflatevenforhighsourcecapacitancesupto1nF.Commonissuessuchasgainpeakingorevenoscillati***are***oidedbythecarefulamplifierdesignandthoroughtestingoftheunitspriortoshipment.InadditiontheDLPCA-200provideshighspeedevenforlargegainsettings.Atthehighestgainsettingof1011V/Aitprovidesa3dBbandwidthof1.1kHzanda300μsrisetime.Forlowfrequencyapplicati***notrequiringthefullbandwidththeunithasaswitchable10HzlowpassfiltertoeliminatewidebandnoiseandthusallowingaccurateandultralownoiseDCcurrentmeasurementsdowntofemtoamps.Applicati***PhotodiodeandPhotomultiplierAmplifierScanningTunnelingMicroscopy(STM)SpectroscopyBeamMonitoringforParticleAccelerators/Synchrotr***IonizationDetectorsPreamplifierforLock-Ins,A/D-Convertersetc.)