Digital phase detector device ultilizing dither generator

Details Digital phase detector device ultilizing dither generator Digital phase detector device ultilizing dither generator

1997-06-12

1999-03-16

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular wave

327 7, 327 12, 327 3, 327150, 327151, G01R 2508

Patent

active

058835369

ABSTRACT:
A phase detector provides a digital output having a linear relationship to the phase difference between a reference signal and an applied input signal. The phase detector counts the number of cycles of the reference signal within a time interval determined by the difference in arrival times of corresponding amplitude transitions of the reference signal and the input signal. A digital output representing the number of counted cycles is produced. A dither generator adds random time variation to the time interval over which the reference signal cycles are counted to introduce a corresponding random variation in the digital output.

REFERENCES:
patent: 4374438 (1983-02-01), Crowley
patent: 4519091 (1985-05-01), Chu et al.
patent: 4654586 (1987-03-01), Evans
patent: 5019786 (1991-05-01), Fairley
patent: 5049766 (1991-09-01), Van Driest
patent: 5488641 (1996-01-01), Ozkan

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