100_Hz_TO_1_MHz_PHASE_METER

Published:2009/7/6 1:08:00 Author:May | From:SeekIC

Provides better than 2% accuracy over most of frequency range, as required for making Bode plots. Based on squaring two sine waves and comparing amount of overlap to total period of an input wave. This gives directly the amount of phase difference between input wave trains, up to 180°. Instead of measuring periods, overlap is integrated over total period to give average of ON to OFF times that can be read as phase difference on voltmeter. Article gives erformancespecifications and describes circuit operation in detail.-D. Kesner, IC Phase Meter Beats High Costs, EDN|EEE Magazine, Oct. 15, 1971, p 49-52.



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