Variable frequency oscillating circuit

Details Variable frequency oscillating circuit Variable frequency oscillating circuit

1984-05-03

1986-04-08

LaRoche, Eugene R.

Oscillators

Solid state active element oscillator

Transistors

331117R, 331167, 331176, H03B 530

Patent

active

045815933

ABSTRACT:
A variable frequency oscillating circuit of the general Colpitts kind in which the frequency of oscillation varies in accordance with the current in a constant current source and oscillation stability is high because the oscillator is of the general LC form. Resonance is provided by a solid-state resonator driving a transistor forming the Colpitts oscillator and which is connected to ground through a constant current source having a controllable current to set the frequency of oscillation. The response characteristic can be linearized using a compensating circuit employing additional constant current sources and current mirror circuits.

REFERENCES:
patent: 3986145 (1976-10-01), Hongu et al.
patent: 4306198 (1981-12-01), Okada

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