Accession Number : AD0164965

Title :   Low Noise Phase Detector.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Harris,Robert W.

Report Date : 22 MAY 1973

Pagination or Media Count : 9

Abstract : The patent describes a phase sensitive detector employing a pair of limiting amplifiers, wherein the outputs are respectively connected to a current switch and a pair of in-line-decision switches. The in-line-decision switches and the current switch provide a current on one of two lines that is indicative of a phase difference between two periodic waveforms as they appear on the input of the limiting amplifier. The switching properties are controlled as a function of each waveforms zero-cross-over point in time. This circuit measures phase difference with high accuracy and resolution and with minimal degradation of the accuracy when measuring weak or noisy signals as a result of employing all zero cross-overs.

Descriptors :   *Phase detectors, *Patents, Low noise, Switching circuits, Amplifiers, Limitations

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE