Temperature detecting transistor circuit

Details Temperature detecting transistor circuit Temperature detecting transistor circuit

1983-06-17

1986-03-04

Miller, Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307255, 307297, 361103, 357 28, H01L 3100, H03K 301, H02H 504

Patent

active

045742057

ABSTRACT:
A temperature detecting transistor circuit includes a first transistor which is connected at the collector to a power source and at the emitter to a ground terminal via first and second resistors, and a second transistor which is connected at the collector to the power source and at the emitter to ground through a third resistor. Further included are a current source which is connected between the power source and the base electrodes of the first and second transistors, and a third transistor which is connected at the base electrode to a node connecting the first and second resistors, at the emitter to the base electrodes of the first and second transistors, and at the collector to the ground terminal. A voltage proportional to absolute temperature is derived from the emitter of the second transistor.

REFERENCES:
patent: 4123698 (1978-10-01), Timko et al.
patent: 4204133 (1980-05-01), Ahmed
patent: 4287439 (1981-09-01), Leuscher
Analog Integrated Circuit Design, A. B. Grebene, pp. 205-209, 1972.

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