Oscillators – Automatic frequency stabilization using a phase or frequency... – With reference oscillator or source
Patent
1991-10-22
1992-12-22
Pascal, Robert J.
Oscillators
Automatic frequency stabilization using a phase or frequency...
With reference oscillator or source
328155, 307511, 307529, H03L 700
Patent
active
051736659
ABSTRACT:
In a frequency synthesizer, a first pulse removing circuit (31) is connected between a reference signal generator (21) and a phase-frequency comparator (24). A second pulse removing circuit (32) is connected between a variable frequency divider (23) and the phase-frequency comparator. Responsive to first removing data indicative of a first pulse number, the first pulse removing circuit removes pulses from the reference signal that are equal in number to the first pulse number for a first predetermined cycle to produce a first pulse removed signal. Responsive to second removing data indicative of a second pulse number, the second pulse removing circuit removes pulses from the divided signal that are equal in number to the second pulse number for a second predetermined cycle to produce a second pulse removed signal.
REFERENCES:
patent: 5027087 (1991-06-01), Rottinghaus
patent: 5028885 (1991-07-01), Voigt et al.
patent: 5036295 (1991-07-01), Kamitani
patent: 5045813 (1991-09-01), Yamashita et al.
patent: 5047733 (1991-09-01), Nonaka et al.
NEC Corporation
Pascal Robert J.
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