MEASURING_PHASE_DIFFERENCE_FROM_0°to±180°

Published:2009/7/1 2:15:00 Author:May | From:SeekIC

This method is capable of measuring phase between 0 to ±180°. The generated square waves A and B are fed to a D flip-flop which gives an output C equal to logic 1 when input 1 leads input 2 and equal to logic 0 in case of lagging. When C = logic 0, the output of the amplifier F will be positive proportional to the average value E of the output of the EX-OR. When C = logic 1, F will be negative and also proportional to E by the same factor. Hence, the output of the meter is positive in case of lagging and negative for leading. The circuit is tested for sinusoidal inputs and indicates a linearity within l%. Measurements are unaffected by the frequency of the inputs up to 75 kHz.



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