Digital counter and digital phase locked loop circuit using same

Details Digital counter and digital phase locked loop circuit using same Digital counter and digital phase locked loop circuit using same

1996-09-17

1999-04-20

Le, Amanda

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

375376, 327159, 327160, 331 17, 331 25, 331DIG2, H03L 7081

Patent

active

058964282

ABSTRACT:
A digital counter comprised of a synchronization judgement circuit and a counting circuit, the synchronization judging circuit receiving as an input signal the results of a comparison from a phase comparison circuit which compares the phase of a reference signal and an output signal of a frequency factoring circuit and outputting a phase synchronization judgement signal to the counting circuit, the counting circuit receiving as input the results of comparison and the phase synchronization judgement signal, performing a count based on the results of comparison, and successively determining a count from the most significant bit to the least significant bit. Also, a digital PLL circuit using the digital counter.

REFERENCES:
patent: 4272729 (1981-06-01), Riley, Jr.
patent: 5517155 (1996-05-01), Yamauchi et al.
patent: 5604775 (1997-02-01), Saitoh et al.
patent: 5651036 (1997-07-01), Hee et al.

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