Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Patent
1985-04-23
1987-02-17
LaRoche, Eugene R.
Oscillators
Automatic frequency stabilization using a phase or frequency...
Afc with logic elements
331 9, 331 15, H03L 700, H03L 702
Patent
active
046442960
ABSTRACT:
A voltage controlled oscillator includes a VCO chip that is a monolithic circuit with a Gunn diode and varactor diode intercoupled by a resonant circuit. A detector/discriminator/power divider chip is coupled to the VCO chip through a directional coupler and is a monolithic circuit having a pair of discriminator diodes and amplitude detector diode on a semi-insulating substrate with associated circuit components. Connected-together electrodes of the discriminator diodes are connected to one output of the power divider. An electrode of the amplitude detector diode is connected to the other output of the power divider. Stagger-tuned resonant circuits are coupled to the other electrodes of the discriminator diodes. Conducting portions forming low pass filters couple the amplitude detector diode and the discriminator detector diodes to respective outputs. The outputs of the discriminator and amplitude detector are coupled to respective inputs of an analog divider that provides a ratio signal that is coupled to the - input of a differential amplifier. The + input of the differential amplifier receives a frequency designating potential. The output of the differential amplifier is coupled to the varactor diode.
REFERENCES:
patent: 4336505 (1982-06-01), Meyer
patent: 4535358 (1985-08-01), Duijkers
Crossley Ian
Donoghue Daniel
Goldswasser Robert
Miley John
Spooner Frank
Hieken Charles
Hieken Charles
LaRoche Eugene R.
Lee James C.
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