Sensitive method for characterizing liquid helium cooled preamplifier feedback resistorsIt is pointed out that the simple and traditional method of measuring resistance using an electrometer is ineffective since it is limited to a narrow and nonrepresentative range of terminal voltages. The present investigation is concerned with a resistor measurement technique which was developed to select and calibrate the Transimpedance Mode Amplifier (TIA) load resistors on the Infrared Astronomical Satellite (IRAS) for the wide variety of time and voltage varying signals which will be processed during the flight. The developed method has great versatility and power, and makes it possible to measure the varied and complex responses of nonideal feedback resistors to IR photo-detector currents. When employed with a stable input coupling capacitor, and a narrow band RMS voltmeter, the five input waveforms thouroughly test and calibrate all the features of interest in a load resistor and its associated TIA circuitry.
Document ID
19840044532
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Smeins, L. G. (Ball Aerospace Systems Div. Boulder, CO, United States)
Arentz, R. F. (Ball Corp. Ball Aerospace Systems Div., Boulder, CO, United States)