Control circuit for multivibrator

Details Control circuit for multivibrator Control circuit for multivibrator

1978-11-30

1980-08-05

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

307273, 331117R, H03K 3282, H03K 3284

Patent

active

042164427

ABSTRACT:
A multivibrator in which a timing capacitor is connected between the collector of a first transistor and the base of a second transistor and in which a current source connected to the collector of the first transistor provides the charging current for the timing capacitor. The conduction path of a third transistor is connected between the collector and base of the first transistor and its control electrode is connected to a control voltage point for controlling the charging period of the capacitor and for ensuring oscillation when the multivibrator is connected as an astable multivibrator.

REFERENCES:
patent: 3559096 (1971-01-01), Lokerson
patent: 3849673 (1974-11-01), Koo
patent: 3942134 (1976-03-01), Schade, Jr.
patent: 3973571 (1976-08-01), Suhel
patent: 4009404 (1977-02-01), Kuo
Golden, "Darlington transistors widen multivibrator's range", Electronics, Nov. 25, 1968, p. 82.
Surprenant, "Variable frequency multivibrator has wide range", The Electronic Engineer, Apr. 1970, pp. 83-85.

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