Differential absolute equalization measurement circuit
Digital phase detector
Digital phase detector
Digital phase detector employing a digitally controllable delay
Digital phase difference detecting circuit
Digital phase measurement method
Digital phase meter apparatus
Digital phase meter circuit
Digital tracking phase meter
Direct phase and frequency demodulation
Direct phase digitization
Direction sensing system for an AC power supply and AC motor dri
Electrical apparatus for detecting relationships in three phase
Electrical phase checking apparatus and method of metering
Electronic device for the measurement of time lags
Electronic instrument for measuring the overall phase and amplit
Electronic metering device including automatic service sensing
Electronic phase sequence indicator for three-phase electric sys
Filter, phase-measuring device and method for application of sai
Frequency measurement using phase continuous frequency switching