Amplitude limited varactor tuned L-C oscillator
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United States of America Patent
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-
Sep 1, 1981
Grant Date -
N/A
app pub date -
Sep 19, 1979
filing date -
Sep 19, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electronically tunable oscillator comprises a transistor coupled to ground by an emitter resistor. The collector and base of the transistor are interconnected through an inductor which has a tap connected to a bypass capacitor and a B+ voltage source. The source maintains the collector and base at the same DC potential. The collector of the transistor is coupled to a capacitance which cooperates with the inductor to provide a tuned circuit. At least part of the capacitance is provided by a varactor whose value can be controlled to determine oscillator frequency. The magnitude of the oscillator frequency is limited to two times the base to emitter voltage of the transistor and the use of the emitter resistor cooperates to minimize distortion.
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