Temperature sensing semiconductor circuit

Details Temperature sensing semiconductor circuit Temperature sensing semiconductor circuit

1985-04-10

1987-03-24

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

307310, 357 28, 323907, G01K 120, G01K 714

Patent

active

046521445

ABSTRACT:
The temperature sensing circuit includes a source of constant current I.sub.S, a voltage divider R.sub.1, R.sub.2 and an output transistor T.sub.1 whose base collector circuit is connected parallel to the first resistor and whose base emitter circuit is connected parallel to the second resistor. An auxiliary source of current having a positive temperature coefficient is connected in series with the first resistor of the voltage divider to cause a voltage drop thereon having an opposite temperature coefficient than the output voltage U.sub.S generated at the collector-emitter circuit of the output transistor.

REFERENCES:
patent: 3668440 (1972-06-01), Davis et al.
patent: 3671770 (1972-06-01), Frederiksen
patent: 3916508 (1975-11-01), Conzelmann et al.
patent: 3943434 (1976-03-01), Haeusler et al.
patent: 4004462 (1977-01-01), Dobkin
patent: 4194134 (1980-03-01), Bjorklund et al.
patent: 4268759 (1981-05-01), Gilbert
patent: 4295088 (1981-10-01), Malchow
patent: 4350904 (1982-09-01), Corkel
patent: 4497586 (1985-02-01), Nelson
H. M. Rein, Ranfft "Integrierte Bipolarschaltungen" (Halbleiter-Elektronik, Band 13) Springer-Verlag, pp. 272, 273, (1980).
IEEE Journal of Solid State Circuits, vol. SC 17, No. 6, (Dec. 1982), p. 1198.

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