Circuit and method for measuring the difference frequency betwee

Details Circuit and method for measuring the difference frequency betwee Circuit and method for measuring the difference frequency betwee

1997-08-25

1998-12-08

Heckler, Thomas M.

G06F 104

Patent

active

058482652

ABSTRACT:
A circuit for measuring the frequency difference between a reference clock and a second clock. The circuit presents a first output in response to a phase crossing between the two clocks. A second circuit presents a second output in response to the first output and the reference clock.

REFERENCES:
patent: 4598257 (1986-07-01), Southard
patent: 5491439 (1996-02-01), Kelkar et al.
patent: 5652532 (1997-07-01), Yamaguchi
patent: 5682112 (1997-10-01), Fukushima

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