Microwave synthesizer with fractional division

Details Microwave synthesizer with fractional division Microwave synthesizer with fractional division

1990-12-20

1992-06-16

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

307516, 328134, 331 17, 331 27, 331DIG2, H03L 7089, H03L 7095, H03L 718

Patent

active

051227622

ABSTRACT:
A synthesizer including a voltage-controlled oscillator, a phase-frequency comparator, a variable-rank frequency divider, a command device to control the oscillation frequency of the voltage-controlled oscillator on a frequency which is a multiple of the frequency of the reference signal as a function of the rank of division of the variable-rank frequency divider. The phase-frequency comparator circuit sends a first series and a second series of pulses as a function of the phase advance or delay respectively of the signals applied to its first and second inputs, to charge or discharge an integration capacitor and provide a signal commanding the advance or delay of the frequency and phase of the oscillator as a function of the voltage developed at the terminals of the capacitor.

REFERENCES:
patent: 4034309 (1977-07-01), Vaughn
patent: 4965531 (1990-10-01), Riley

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