Oscillators – Solid state active element oscillator – Transistors
Patent
1979-08-29
1982-03-23
Grimm, Siegfried H.
Oscillators
Solid state active element oscillator
Transistors
331175, 331185, 332 31T, H03B 512
Patent
active
043215637
ABSTRACT:
A frequency stabilizing device for a FET high-frequency oscillator comprises means for coupling an automatic biasing circuit included in the source-ground connection of the oscillator to a drain voltage supply circuit included in the drain-ground connection of the oscillator to provide simultaneous and oppositely directed variations of the resistance of the automatic biasing circuit and of the value of the drain-ground voltage supplied by the drain voltage supply circuit. A variation of this device can serve as a modulation stage wherein the coupling means comprise a modulating circuit arranged to supply two branches in parallel, each branch comprising a series arrangement of a shaping circuit and an impedance-matching circuit and one of which constitutes the automatic biasing circuit and the other one the drain voltage supply circuit.
REFERENCES:
patent: 2396439 (1946-03-01), Schlesinger
patent: 3534294 (1970-10-01), Auer
Franzblau Bernard
Grimm Siegfried H.
U.S. Philips Corporation
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