Temperature compensated switching circuit

Details Temperature compensated switching circuit Temperature compensated switching circuit

1978-05-09

1980-09-02

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307251, 307310, H03K 1700

Patent

active

042208734

ABSTRACT:
Temperature compensation is provided in a switching circuit for the saturation voltage drop across a bipolar transistor through which a voltage source is applied to an output terminal. The base current of the bipolar transistor is varied inversely with temperature to hold the saturation voltage drop thereacross substantially constant within the switching circuit. High temperature nonsaturating means for interrupting the base current to the bipolar transistor is combined with this temperature compensation to enhance the turn-on speed of the bipolar transistor in one of the described embodiments. In another embodiment a three state logic circuit (saturated, nonsaturation and nonconductive) is used to interrupt the base current to the bipolar transistor and thereby enhance both the turn on and turn off speed of the bipolar transistor.

REFERENCES:
patent: 3374361 (1968-03-01), Callis
patent: 3397326 (1968-08-01), Gallagher et al.
patent: 3686517 (1972-08-01), Sexton, Jr.
patent: 3867644 (1975-02-01), Cline
patent: 3899693 (1975-08-01), Gaudreault

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