3895294 is referenced by 19 patents and cites 5 patents.

A device for measuring the phase change of an input signal over a specified eriod comprising a phase-locked tracking filter including a high frequency voltage-controlled oscillator (VCO), a frequency divider to give local oscillator signal at the same frequency as the input signal and a counter counting cycles of the VCO whose phase change in any period is N times the input phase change to allow 1/N period resolution, N being an arbitrary integer. The phase change measuring circuit thus allows phase measurement with a resolution within a small fraction of one cycle.

Title
Phase change measuring circuit
Application Number
05/442,538
Publication Number
3895294
Application Date
February 14, 1974
Publication Date
July 15, 1975
Inventor
Vinding Jorgen P
Agent
Curry Charles D B
Sciascia R S
Assignee
The United States of America represented by the Secretary of the Navy
IPC
G01r 25/00
H03L 07/16
H03L 07/08
H03L 07/191
H03L 07/87
G01R 25/00
View Original Source