Automatic substitution of a reference oscillator for synchronizi

Details Automatic substitution of a reference oscillator for synchronizi Automatic substitution of a reference oscillator for synchronizi

1996-07-30

1998-10-06

Grimm, Siegfried H.

Oscillators

Plural oscillators

Oscillator used to vary amplitude or frequency of another...

331 2, 331 49, 375260, 455 60, H03L 707

Patent

active

058183051

ABSTRACT:
A circuit for automatically substituting a reference oscillator for synchronizing two transmitter co-channel local oscillators. The circuit includes a first bias switching device for switching a first power supply to a first reference oscillator and a second bias switching device for switching a second power supply to a second reference oscillator. The first and second reference oscillators generate first and second reference signals for synchronizing the oscillator frequencies. A first divider firstly and secondly divides and outputs the power of the first reference signal. A second divider firstly and secondly divides and outputs the power of the second reference signal. A first combining device inputs the power of the firstly-divided first reference signal and the secondly-divided second reference signal and outputs the power to the phase locked dielectric resonator oscillator for the vertical polarization wave. A second combining device inputs the power of the firstly-divided second reference signal and the secondly-divided first reference signal and outputs the power to the phase locked dielectric resonator oscillator for the horizontal polarization wave. A first switching control switches the second bias switching device in response to generation of the first reference signal secondly-divided in the first divider. A second switching control switches the first bias switching device in response to generation of the second reference signal secondly-divided in the second divider.

REFERENCES:
patent: 4254492 (1981-03-01), McDermott, III
patent: 4419629 (1983-12-01), O'Brien

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