Resistance Comparisons at Nanovolt Levels Using an Isolating Current Ratio Generator
- 1 April 1970
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 41 (4) , 493-497
- https://doi.org/10.1063/1.1684561
Abstract
A circuit has been developed for the generation of isolated currents having precisely defined ratios. It can be used to compare resistances with accuracies up to 0.03 ppm and with sensitivities as low as 1 nV. When comparisons are made using low frequency currents, thermal emf's are eliminated. Several variations of the circuit which can be made easily in the laboratory are described.Keywords
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