Linear voltage-controlled oscillator using fixed capacitors in l

Details Linear voltage-controlled oscillator using fixed capacitors in l Linear voltage-controlled oscillator using fixed capacitors in l

1993-07-14

1995-11-21

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331177R, H03B 512

Patent

active

054691192

ABSTRACT:
The frequency of a resonant circuit in the emitter path of an output transistor is caused to vary linearly with control voltage. The control voltage is applied to a circuit that constrains the ac current through the resonant circuit to be supplied through the emitters of a two-transistor current steering circuit. The sum of the two transistor's dc emitter currents is constant while the dc current through one of the two transistors' emitters varies as the square root of the control voltage.

REFERENCES:
patent: 3553380 (1971-01-01), Greenwald
patent: 4230953 (1980-10-01), Wilcox
patent: 4684904 (1987-08-01), Watkins et al.
patent: 4709409 (1987-11-01), Ma et al.

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