3764903 is referenced by 16 patents and cites 2 patents.

A phase measuring system includes apparatus for measuring the difference in phase between a periodic input signal and a reference signal while using the same reference signal as a clock whose periods are counted as a measure of the difference in phase between the reference signal and the input signal. This is accomplished by first multiplying the phase of the input signal and then dividing its frequency and phase by a given amount and comparing this divided signal with the reference signal whose frequency and phase is also divided by the same amount. The two divided signals serve to respectively enable and disable a gate which passes the reference signal to a counter whose count manifests the phase difference between the two signals being compared.

Phase measuring system
Application Number
Publication Number
Application Date
August 7, 1972
Publication Date
October 9, 1973
Griswold Frederick Bethel
RCA Corporation
H03d 13/00
G01r 25/00
G01R 25/00
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