Application of Alternating Current Comparator on Scaling Four-Terminal Impedances
LI Zheng-kun · Electrical Measurement & Instrumentation · 2009
Alternating Current Comparator (ACC) is very suitable for measuring four-terminal impendence for its accurate current ratio. The development and basic principle of ACC are presented and the application of ACC on scaling four-terminal impendence is summarized in detail. Then,this paper indicates that the ACC-bridge for audio frequency may be further researched. Some key problems of audio frequency ACC-bridge,such as compensation of the capacitance error,sensitivity,and calibration method for ratio,are mainly discussed.