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Title: Developments In Ac Metrology II
Author: Ian King David Dingley Larry Eccleston
Source: 1991 Measurement Science Conference
Year Published: 1991
Abstract: This paper describes the practical implementation of a modular highcurrent, very wide-band transconductance amplifier based upon a design by the National Institute of Standards and Technology (NIST) which is capable of outputs up to 20A with a specified frequency response of DC to 100 kHz and a useable frequency range extending to 1 MHZ. The prototype of this unit has enabled the extension of AC current measurement capability at a. National level to 100 Liz and possibly beyond. Descriptions are given of the advantages and limitations of the Multi-Cell appropch to the output stage. The Automated system used to perform final Test, Calibration and Performance verification is described along with the major factors in bringing such a unit to commercial production.

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