Voltage controlled oscillator with self-adjustment

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

H - Electricity

03

B

331/62

H03B 5/08 (2006.01) H03B 5/02 (2006.01) H03L 7/08 (2006.01) H03L 7/099 (2006.01) H03L 7/089 (2006.01)

Patent

CA 1282128

VOLTAGE CONTROLLED OSCILLATOR WITH SELF-ADJUSTMENT ABSTRACT OF THE DISCLOSURE A voltage controlled oscillator includes automa- tic adjust circuitry to achieve and maintain desired oper- ating characteristics such that for a predetermined output frequency the oscillator will have a predetermined input voltage. The oscillator may advantageously be incorpor- ated 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 volt- age controlled oscillator in the phase locked loop and varies the amount of a bias voltage applied to the oscil- lator 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 main- tained in spite of long term changes in the circuit opera- tion.

518900

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