Phase locked loop frequency synthesizer

Details Phase locked loop frequency synthesizer Phase locked loop frequency synthesizer

1993-01-22

1994-11-01

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 17, 331173, 331 25, H03L 708, H03L 718

Patent

active

053610440

ABSTRACT:
In a PLL frequency synthesizer capable of minimizing power consumption in the power saving operation, there are disposed a voltage controlled oscillator, a phase detector, an active filter, a reference frequency oscillator, a dual modulus prescaler, and a pulse swallow counter having a modulus control terminal. In the power saving operation, the modulus control terminal is set to an inactive state by a controller to prevent power of a power source from being supplied via the pulse swallow counter to the dual modulus prescaler.

REFERENCES:
patent: 5045813 (1991-09-01), Yamashita et al.

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