Self-regulating oscillator circuit and method

H - Electricity – 03 – L

Patent

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H03L 5/00 (2006.01) H03L 1/00 (2006.01) H03B 1/04 (2006.01)

Patent

CA 2079021

A self-regulating oscillator circuit and method are disclosed. Specifically, a method is described whereby an oscillator having an active device is operated. The oscillator is operated by providing a current through the active device, as well as through a reference device connected in series with the active device of the oscillator. A reference voltage across the reference device is sampled, and a regulated voltage is generated by adding a predetermined voltage to the sampled reference voltage. Finally, the regulated voltage is applied to the active device of the oscillator. In one circuit embodiment, the oscillator as described includes a gallium arsenide FET structure which cooperates with a resonant structure to produce a reflection-type oscillator. In addition, a regulator circuit is described including an isolating op amp which samples the reference voltage from the active device of the oscillator and provides its output to a voltage source device. The voltage source device adds an additional fisted voltage to the sampled voltage and the additional voltage is connected through a pn junction to provide a regulated output voltage. The regulated output voltage is connected to the active device of the oscillator, thereby maintaining the voltage drop across the active device to improve oscillator performance.

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