Current controlled emitter coupled multivibrator

Details Current controlled emitter coupled multivibrator Current controlled emitter coupled multivibrator

1976-12-01

1978-04-04

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

329102, 332 9T, 332 14, 332 16T, H03K 3282, H03K 706

Patent

active

040830195

ABSTRACT:
A multivibrator circuit has a main constant current source through which the main portion of the current of the multivibrator circuit is supplied and a by-pass current source through which a portion of the current to be supplied to the main constant current source is supplied, whereby the duty cycle of the multivibrator circuit is controlled. When the by-pass current is changed, the frequency of the multivibrator circuit is changed. The frequency of the multivibrator, when used as the frequency-modulated oscillator in a video tape recorder, may thus be set regardless of the signal clipping level and signal clamping level in a video recording circuit of the video tape recorder.

REFERENCES:
patent: 3811097 (1974-05-01), Dijkmans
patent: 3857110 (1974-12-01), Grebene
patent: 3902140 (1975-08-01), Grebene

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