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Evaluation of an alternative null detector for adapted Wheatstone bridge



Shamith U. Payagala, Alana M. Dee, Dean G. Jarrett


The adapted Wheatstone bridge technique has been utilized at National Institute of Standards and Technology (NIST) and other National Metrology Institutes (NMIs) for high resistance measurements. In this work, we evaluate the suitability of a transimpedance amplifier (TIA) as a null detector for the adapted Wheatstone bridge to improve high resistance measurements. Initial resistance measurements using the TIA based null detector showed an order of magnitude improvement in the Type A uncertainty.
Proceedings Title
2020 Conference on Precision Electromagnetic Measurements(CPEM 2020)
Conference Dates
August 22-28, 2020
Conference Location
Denver, CO
Conference Title
Conference on Precision Electromagnetic Measurements


High resistance measurement, low-current measurements, resistance standards, transimpedance amplifier
Created August 23, 2020, Updated September 1, 2020