Frequency-doubling oscillator, tuned by varactors
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United States of America Patent
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Sep 19, 1989
Grant Date -
N/A
app pub date -
Dec 16, 1988
filing date -
Dec 18, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrahigh-frequency oscillator. To double the frequency of an oscillator having a single field-effect transistor (10), whose fundamental frequency is adjusted by an impedance of gate (13) and an impedance of source (15), a filter (16+17) is mounted between the drain of transistor (10) and the ground. This filter, formed by a self-induction coil (16) in series with a varactor (17) is adjusted to the fundamental frequency: it assures the rejection, and favors the generation of the second harmonic, at double frequency. Application to ultrahigh-frequency sources.
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