Voltage controlled emitter-coupled multivibrator

Details Voltage controlled emitter-coupled multivibrator Voltage controlled emitter-coupled multivibrator

1997-05-30

1999-02-02

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331144, 331177R, H03K 3282

Patent

active

058670700

ABSTRACT:
A voltage controlled emitter-coupled multivibrator in which a frequency range of an oscillating signal and a frequency within the frequency range can be adjusted. An emitter-coupled multivibrator is provided with an emitter follower buffer having first and second transistors, a gain stage having third and fourth transistors which are cross-coupled through the first and second transistors, and a current source connected to emitters of the third and the fourth transistors, and generates first and second oscillating frequency signals. An outputting section compares a first voltage level of the first oscillating signal with a second voltage level of the second oscillating signal and outputs a compared signal having a predetermined voltage level. A controlling section outputs a controlling current which controls an amount of a current which flows through the current source of the emitter-coupled multivibrator. The oscillating frequency and the oscillating frequency range can be adjusted by inputting two controlling voltages via the controlling section. Therefore, the oscillating signal which has a wide range of frequencies from a low frequency to a high frequency can be obtained.

REFERENCES:
patent: 4083019 (1978-04-01), Hamada et al.
patent: 4749961 (1988-06-01), Kato et al.

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