Precision high-value resistance scaling with a two-terminal cryogenic current comparator

Published

March 1, 2014

Author(s)

Randolph E. Elmquist, George R. Jones, Felipe L. Hernandez-Marquez, Marcos Bierzychudek

Abstract

We describe a cryogenic two-terminal high-resistance bridge and its application in precision resistance scaling from the quantized Hall resistance (QHR) at RH = RK/2 = 12 906.4035 _ to decade resistance standards with values between 1 M_ and 1 G_. The design minimizes lead resistance errors with multiterminal connections to the QHR device. A single variable voltage source and resistive ratio windings are utilized to achieve excellent dynamic stability, which is not readily obtained in low-current measurements with conventional cryogenic current comparators (CCCs). Prototypes of his bridge have been verified by a successful international comparison of high-resistance scaling using two-terminal CCCs in the national metrology institutes of Argentina, Mexico, and the United States.

Citation

Review of Scientific Instruments

Volume

85

Issue

044701

Pub Type

Journals

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Keywords

electrical resistance standard, quantized Hall resistance, national metrology institute, cryogenic current comparator, key comparison

Citation

Elmquist, R. , Jones, G. , Hernandez-Marquez, F. and Bierzychudek, M. (2014), Precision high-value resistance scaling with a two-terminal cryogenic current comparator, Review of Scientific Instruments, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914606 (Accessed October 8, 2025)