Slip phase control PLL

Details Slip phase control PLL Slip phase control PLL

1990-02-21

1991-09-03

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

331 1A, 331 25, 455260, H03L 7197

Patent

active

050458132

ABSTRACT:
A slip phase control phase-locked loop includes a voltage-controlled oscillator for generating a frequency signal, and a binary programmable frequency divider for producing a frequency-divided signal in response to the frequency signal supplied thereto, the binary programmable frequency divider including a 2-scale-factor prescaler, a swallow counter, and a main counter. The phase of the frequency-divided signal is compared with the phase of a reference frequency signal. A phase-compared signal is integrated and the integrated signal is applied to the voltage-controlled oscillator. A D/A converter swallow counter and a D/A converter counter are operable with the binary programmable frequency divider for D/A-converting a signal derived from the frequency signal into a pulse-width-modulated signal corresponding to the phase-compared signal at a present count ranging from 0 to 2.sup.M -1, where M is a positive integer.

REFERENCES:
patent: 4686488 (1987-08-01), Attenborough

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