Center offset microwave frequency synthesizer

Details Center offset microwave frequency synthesizer Center offset microwave frequency synthesizer

1988-11-16

1989-11-21

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

With intermittent comparison controls

331 16, 331 17, 331 30, H03L 718

Patent

active

048825492

ABSTRACT:
An improved microwave frequency signal source using a single frequency offset technique which increases the frequency range of an indirect frequency synthesizer to twice the highest operating frequency of the programmable digital frequency divider in the loop includes a voltage-controlled oscillator (VCO) operating within a predetermined microwave frequency band and phase-locked to a reference oscillator operating at a reference frequency below microwave frequencies. The offset loop signal is developed by heterodyning the voltage-controlled oscillator (VCO) output signal with a microwave signal whose frequency is located at the center of the predetermined microwave frequency band of the VCO to form a signal at an intermediate frequency (I.F.) within the frequency range of a programmable digital frequency divider.

REFERENCES:
patent: 3023370 (1962-02-01), Waller
patent: 3793594 (1974-02-01), Griswold

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