Variable frequency JFET microwave oscillator with variable imped

Details Variable frequency JFET microwave oscillator with variable imped Variable frequency JFET microwave oscillator with variable imped

1997-04-30

1998-12-29

Mis, David

Oscillators

Solid state active element oscillator

Transistors

331 34, 331 96, 331177R, H03B 518

Patent

active

058545778

ABSTRACT:
A variable frequency microwave oscillator comprises an oscillation FET of a junction type, a fixed impedance block connected to the source of the oscillation FET for determining the drain impedance on the source of the oscillation FET, and a variable bias block including inductance connected to the drain of the oscillation FET and an impedance controlling junction FET both for determining the drain impedance of the oscillation FET of a junction type. The gate of the oscillation FET is connected to an external resonance block which generates an oscillation in association with the negative impedance appearing on the gate of the oscillation FET. The oscillation frequency is controlled by a control voltage applied to the gate of the impedance controlling FET.

REFERENCES:
patent: 4216443 (1980-08-01), Zaderej
patent: 5097228 (1992-03-01), McJunkin

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