3582780 is referenced by 5 patents and cites 2 patents.

A phase measuring and monitoring circuit adapted to measure the phase difference between a reference signal and a monitored signal having a counter switchable to either an add or substract mode, the input to which is a sequence of measured pulses controlled by a filter and zero-crossing detector, the inputs of which are time-shared by the reference signal and the signal to be measured.

System responsive to change of phase between two electrical waves
Application Number
Publication Number
Application Date
December 18, 1968
Publication Date
June 1, 1971
Hole Godfrey W
Amalgamated Wireless
G01r 25/00
G01R 23/00
G01S 01/30
G01S 01/00
View Original Source