Method and apparatus for controlling a voltage controlled oscill

Details Method and apparatus for controlling a voltage controlled oscill Method and apparatus for controlling a voltage controlled oscill

1995-09-05

1997-11-11

Pascal, Robert

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331179, 331 17, 331DIG2, 331 2, 327159, 327160, 327107, H03L 7095, H03L 700

Patent

active

056868642

ABSTRACT:
A frequency synthesizer (100, 500) provides multiple selectable voltage controlled oscillator (VCO) frequency ranges. A VCO control circuit (114) controls the selectable VCO frequency ranges based on lock conditions of selected VCOs within a VCO array (112) or a single variable VCO circuit (502), to provide an extended tuning range to the frequency synthesizer (100, 500).

REFERENCES:
patent: 4270213 (1981-05-01), Falk et al.
patent: 4574243 (1986-03-01), Levine
patent: 4590602 (1986-05-01), Wolaver
patent: 4714899 (1987-12-01), Kurtzman et al.
patent: 4764737 (1988-08-01), Kaatz
patent: 5389898 (1995-02-01), Taketoshi et al.

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