Wide band frequency phase locked loop frequency synthesizer

Details Wide band frequency phase locked loop frequency synthesizer Wide band frequency phase locked loop frequency synthesizer

1982-07-09

1985-03-12

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 17, 331 25, H03L 718

Patent

active

045048002

ABSTRACT:
The synthesizer comprises a single phase loop formed by two stages of a frequency divider inserted between the voltage controlled oscillator and the phase comparator. The synthesized frequency is taken from the connection between the two stages, which allows a frequency range to be obtained extending over a wide band with a voltage controlled oscillator itself having a small relative band width.

REFERENCES:
patent: 3828271 (1974-08-01), Schwanauer
patent: 4002995 (1977-01-01), Reed
patent: 4078213 (1978-03-01), Campioni
Underhill et al., "Fast Digital Frequency Synthesizer", Electronics Letters, May 25, 1978, vol. 14, No. 11, pp. 342, 343.

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