Temperature measuring system

Details Temperature measuring system Temperature measuring system

1982-10-19

1986-01-07

Krass, Errol A.

Boots, shoes, and leggings

236 46R, G01K 700, F23N 520

Patent

active

045637482

ABSTRACT:
A temperature measuring system which includes a CR oscillator circuit and a logarithmic transformation circuit. The CR oscillator circuit employs at least a thermistor as the resistance element for forming a time constant with a capacitor which serves as the capacitance element, the oscillation frequency of the oscillator circuit varying with a change in ambient temperature. The logarithmic transformation circuit subjects the information obtained from the CR oscillator circuit to a logarithmic transformation, whereby said information is logarithmically compressed to provide numerical data approximately dependent upon ambient temperature.

REFERENCES:
patent: 3978325 (1976-08-01), Goldstein et al.
patent: 4031365 (1977-06-01), Raggiotti et al.
patent: 4068526 (1978-01-01), Goldstein
patent: 4199677 (1980-04-01), Vanderpool
patent: 4206872 (1980-06-01), Levine
patent: 4314665 (1982-02-01), Levine
patent: 4362995 (1982-12-01), Morris
patent: 4398261 (1983-08-01), Saint-Oyant et al.

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