Digital phase comparator

Details Digital phase comparator Digital phase comparator

1994-09-15

1996-10-08

Wambach, Margaret R.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By phase

3401462, G01R 2500

Patent

active

055635318

ABSTRACT:
A digital phase comparator supplies digital values corresponding to the phase shifts between a first signal having a duty cycle of approximately 0.5 and a second signal. The comparator includes a one-way counter initialized at the frequency of the first signal and clocked by a clock signal having a high frequency with respect to the frequency of the first and second signals. A logic gate enables the counter when the first and second signals are in respective predetermined states. A phase shift is considered to be zero when it corresponds approximately to one half of the counter's capacity.

REFERENCES:
patent: 4351002 (1982-09-01), Decraemer et al.
patent: 4654586 (1987-03-01), Evans et al.
patent: 4683495 (1987-07-01), Brock
patent: 5302908 (1994-04-01), Tarusawa et al.

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