ACシャント校正装置のためのAF帯域超精密バッファアンプの開発

概要

論文の詳細を見る
The National Metrology Institute of Japan (AIST, NMIJ) has launched the project for the development of AC shunt standards since 2007. AC shunts allow the most precise masurement of current. A high precision AC shunt is an important component of non-sinusoidal power standards which is in progress. The AC shunt calibration system helps improve the uncertainty assesments of the national primary power standards. The calibration system design with uncertainties up to 10 ppm requires a precise buffer amplifier which has uncertainties up to 1 ppm in the frequency range from 10 Hz to 10 kHz with other uncertainty components taken care of. The two buffer amplifiers dealt with in this paper were verified to have accuracies within 2 ppm and uncertainties within 1 ppm in in-phase and quadrature error in the frequency range from 10 Hz to 10 kHz. It also implies that there is possibilities to reduce both in-phase and quadrature error at 10 kHz within 1 ppm, by taking advantage of the both features. This paper describes the circuit designs and the evaluation results of two different buffer amplifiers.
社団法人電気学会の論文
2009-04-01