Phase-locked loop circuit

Details Phase-locked loop circuit Phase-locked loop circuit

1989-04-07

1991-04-02

Teska, Kevin J.

Boots, shoes, and leggings

307262, 328155, 331 25, 364481, G06F 1520, H03K 513

Patent

active

050051415

ABSTRACT:
A phase-locked loop circuit adapted to produce a stable output signal having the same frequency and phase as those of an input signal. Phase comparator means measures the time difference between the rising edge of the input signal and the falling edge of the feedback signal, and calculator means executes a phase control calculation twice per cycle on the basis of the measured time difference. Then a variable-frequency oscillator circuit produces, in accordance with the result of such calculation, an output signal whose frequency and phase are locked to those of the input signal.

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patent: 4646004 (1987-02-01), Brandt et al.
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patent: 4715000 (1987-12-01), Premerlani
patent: 4723216 (1988-02-01), Premerlani
patent: 4752748 (1988-06-01), Graeszykowski
patent: 4807146 (1989-02-01), Goodrich et al.
patent: 4847870 (1989-07-01), Butcher
patent: 4864253 (1989-09-01), Zwack
patent: 4897778 (1990-01-01), Miyamoto et al.

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