Temperature threshold detection circuit

Details Temperature threshold detection circuit Temperature threshold detection circuit

1988-08-23

1990-05-08

Eisenzopf, Reinhard J.

Communications: electrical

Condition responsive indicating system

Specific condition

307310, 374181, G08B 1700

Patent

active

049242121

ABSTRACT:
A threshold temperature detection is made by measuring the reverse saturation current of a transistor subjected to the temperature to be measured. It is shown that, for temperatures close to the ambient temperature, the sensitivity of this detector is very high. Furthermore, in making a circuit that measures the relative variations of the reverse saturation current, a temperature detector is made which is independent of variations in characteristics resulting from manufacturng tolerances for integrated circuits. This circuit is particularly designed to be implanted in the same substrate as a memory circuit of the type with memory cells, provided with floating gate transistors.

REFERENCES:
patent: 2929968 (1960-03-01), Henisch
patent: 3491596 (1970-01-01), Dean
patent: 3540283 (1970-11-01), Dean
patent: 4121461 (1978-10-01), Butler et al.
patent: 4313082 (1982-01-01), Neidorff
patent: 4331888 (1982-05-01), Yamauchi
patent: 4448549 (1984-05-01), Hashimoto et al.
patent: 4549818 (1985-10-01), Nishikubo et al.
patent: 4625128 (1986-11-01), Boeckmann
patent: 4730228 (1988-03-01), Einzinger et al.
patent: 4760433 (1988-07-01), Young et al.

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