Stochastic 2-bit null detector

Abstract

© Published under licence by IOP Publishing Ltd. An application of the stochastic measurement approach for measurement of low AC signals, found in null detectors, is shown in the paper. The measurement structure is based on a 2-bit flash A/D converter and digital multipliers with accumulators that calculate in-phase and quadrature values for measured signal at signal frequency. Possible application of such null detector in AC bridge with two sources is presented. Simulations prove the theoretical considerations and encourage further development of a null-detector based on presented method.