Auto-balance of Digital AC Bridge Based on GIC

摘要

A fast and wide-range balance theory of digital AC bridge is proposed, and a hardware implementation of the method is designed. In the implementation, an impedance component is based on a GIC (general immittance convertor) system, which provides a variable impedance. The principle of this method is comprehensive and its implementation is simple. As a digital measurement technique, the method takes full advantage of the powerful arithmetic and processing ability of a microprocessor.