Voltage-controlled type oscillator

Details Voltage-controlled type oscillator Voltage-controlled type oscillator

1977-02-22

1977-12-06

Kominski, John

Oscillators

Solid state active element oscillator

Transistors

331177R, H03K 3282

Patent

active

040619877

ABSTRACT:
A voltage-controlled type oscillator includes a differential amplifier constituted by a first and second transistors for establishing a current, as the collector current of the second transistor, proportional to an input control voltage, and an oscillating device for producing an oscillatory signal whose frequency is determined by that current. An element having a p-n junction is connected between the second transistor and the oscillating device and a further transistor is connected between the first transistor and a power source. A portion of the current flowing from the oscillating device is divided as a base current to the abovementioned further transistor whereby an adverse influence by the base current of the second transistor is eliminated. Thus the oscillation frequency is accurately proportional to the input control voltage.

REFERENCES:
patent: 3870971 (1975-03-01), Takahashi et al.
patent: 3886485 (1975-05-01), Takahashi
patent: 3946330 (1976-03-01), Takahashi
patent: 3959743 (1976-05-01), Nagahama

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