Bipolar microwave monolithic voltage controlled oscillator using

Details Bipolar microwave monolithic voltage controlled oscillator using Bipolar microwave monolithic voltage controlled oscillator using

1993-07-06

1994-09-13

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331167, 331177R, 333214, H03B 524, H03H 1104

Patent

active

053472381

ABSTRACT:
A voltage controlled oscillator provides a fixed amplitude output at an adjustable frequency. The voltage controlled oscillator includes a first transistor including an emitter, a base, and a collector. A first capacitor is connected between the emitter and the base of the first transistor. An inductance simulating device generates a controllable impedance and includes second and third transistors each with a base, an emitter, and a collector. The second and third transistors are connected between the base and the collector of the first transistor. The controllable impedance includes an inductive reactance component related to a quiescent bias current flowing through the third transistor. A current source connected to the third transistor generates the quiescent bias current to vary the inductive reactance component. The inductive reactance component and the first capacitor vary the adjustable frequency of oscillation.

REFERENCES:
patent: 4812785 (1989-03-01), Pauker

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