Accession Number : ADD001666
Title : Phase Change Measuring Circuit.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Vinding,Jorgen P
Report Date : 15 Jul 1975
Pagination or Media Count : 4
Abstract : The patent describes a device for measuring the phase change of an input signal over a specified period. It includes a phaselocked 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.
Descriptors : *Phase measurement, *Patents, Circuits, Phase locked systems, Voltage controlled oscillators, Filters, Frequency dividers
Subject Categories : Test Facilities, Equipment and Methods
Distribution Statement : APPROVED FOR PUBLIC RELEASE