Frequency-doubling oscillator, tuned by varactors

Details Frequency-doubling oscillator, tuned by varactors Frequency-doubling oscillator, tuned by varactors

1988-12-16

1989-09-19

Mis, David

Oscillators

Solid state active element oscillator

Transistors

331177V, H03B 512

Patent

active

048685267

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.

REFERENCES:
patent: 4670722 (1987-06-01), Rauscher
Scott, B. N. et al.; "Octave Band Varactor-Tuned GaAs FET Oscillators"; 1981 IEEE International Solid-State Circuits Conference, pp. 138--139.

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