Variable frequency multivibrator

Details Variable frequency multivibrator Variable frequency multivibrator

1988-04-25

1989-05-16

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331144, H03K 3282

Patent

active

048313424

ABSTRACT:
A variable frequency multivibrator circuit comprises first and second switching transistors having emitters coupled across a timing capacitor. First and second feedback circuits provide positive feedback to the first and second switching transistors whenever the first or second switching transistors are on. A control current controls the frequency of the multivibrator circuit and is independent of the feedback current. Additional drive is provided to the first and second switching transistors during their transitions from an off to an on state.

REFERENCES:
patent: 3688213 (1972-08-01), Calaway
patent: 3857110 (1974-12-01), Grebene

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