High speed phase locked loop frequency synthesizer

Details High speed phase locked loop frequency synthesizer High speed phase locked loop frequency synthesizer

1979-07-30

1981-09-15

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 16, 331 17, 331 25, H03L 718

Patent

active

042900280

ABSTRACT:
A phase locked looped type frequency synthesizer utilizing a source of a reference signal comprising a voltage controlled oscillator and a phase detector which receives the reference signal and compares that to the output signal of the voltage control oscillator after suitable division by a programmable divider. The phase detector outputs a control voltage to the oscillator thereby regulating the output frequency from the oscillator wherein the programmable divider is programmed to divide or count by N, where N is capable of being a division number which is an integer or non-integer thereby allowing an increasing of the reference frequency and a decreasing of the settling time of the system without a need to increase the channel spacing.

REFERENCES:
patent: 3516007 (1970-06-01), Bos et al.
patent: 3872397 (1975-03-01), Hanneman
patent: 3898690 (1975-08-01), Desai
patent: 3959737 (1976-05-01), Tanis
patent: 4121162 (1978-10-01), Alberkrack et al.

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