Phase-locked loop circuit

Details Phase-locked loop circuit Phase-locked loop circuit

1997-01-24

1998-08-18

Nelms, David C.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 1A, 331 11, 331 17, 331 25, H03L 700

Patent

active

057963118

ABSTRACT:
A PLL circuit has a feedback loop including a plurality of feedback circuits in parallel and a combining circuit. The feedback circuits receives an output signal of the PLL circuit and produce feedback output signals, respectively. The combining circuit combines the feedback output signals into a feedback signal which is used to be compared to a reference signal. The feedback circuits in parallel each divide a frequency of the output signal by a predetermined number and the combining circuit performs logical OR of the feedback output signals.

REFERENCES:
patent: 5216387 (1993-06-01), Telewski et al.
patent: 5260979 (1993-11-01), Parker et al.
patent: 5550515 (1996-08-01), Liang et al.

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