Voltage controlled oscillator with self-adjustment of operating

Details Voltage controlled oscillator with self-adjustment of operating Voltage controlled oscillator with self-adjustment of operating

1985-09-26

1987-05-19

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

331 25, 331 36C, 331177V, H03B 508, H03L 708

Patent

active

046671706

ABSTRACT:
A voltage controlled oscillator includes automatic adjust circuitry to achieve and maintain desired operating characteristics such that for a predetermined output frequency the oscillator will have a predetermined input voltage. The oscillator may advantageously be incorporated into a phase locked loop circuit. The phase locked loop will lock onto the frequency of an input signal. Automatic adjust circuitry monitors the input to the voltage controlled oscillator in the phase locked loop and varies the amount of a bias voltage applied to the oscillator so that the input voltage to the oscillator will change until it reaches the desired level. The provision of the automatic adjust circuitry enables the desired operating characteristics of the oscillator to be maintained in spite of long term changes in the circuit operation.

REFERENCES:
patent: 4494090 (1985-01-01), Popek et al.

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