Fast frequency switching synthesizer

Details Fast frequency switching synthesizer Fast frequency switching synthesizer

1996-02-13

1997-12-02

Pascal, Robert

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

331 25, 327105, 327113, 327147, 327156, H03L 718

Patent

active

056940890

ABSTRACT:
This is a PLL frequency synthesizer having a reference divider for dividing a reference source signal, and an RF divider for dividing the output of a voltage controlled oscillator, wherein when changing over the frequency, first the division value of the RF divider changes periodically to become a fractional division value in average, and after the frequency is nearly changed over, the RF divider is set in a conventional integer division operation, therefore, the frequency can be changed over at high speed by the fractional division operation high in reference frequency, and after the changing, a low spurious signal characteristic may be realized.

REFERENCES:
patent: 5038117 (1991-08-01), Miller
patent: 5267273 (1993-11-01), Dartois et al.
patent: 5420545 (1995-05-01), Davis et al.
patent: 5424687 (1995-06-01), Fukuda
E. Sharoni, "Fast Switching Synthesizer", Conference Record of the 1985 IEEE Military Communications Conference, vol. 2 of 3, pp. 329-333, Oct. 20-23, 1985.
European Search Report dated Dec. 20, 1996.

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