Electronic digital thermometer

Details Electronic digital thermometer Electronic digital thermometer

1977-12-02

1979-04-24

Woodiel, Donald O.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

235 92MT, 331 66, G01K 716

Patent

active

041505735

ABSTRACT:
An electronic digital thermometer comprises a pulse oscillator to which a temperature-sensitive resistive element and a temperature-insensitive standard resistive element are alternately coupled as a frequency determining element, a temperature output circuit which is provided with a counter connected to the pulse oscillator and provides a measured temperature value, and a digital display device for displaying the measured temperature value. The temperature output circuit is so arranged that oscillation frequencies of the pulse oscillator respectively produced when the temperature-sensitive resistive element and the standard resistive element are coupled with the pulse oscillator are compared to calculate a measured temperature value.

REFERENCES:
patent: 3872728 (1975-03-01), Joyce et al.
patent: 3875503 (1975-04-01), Hayashi
patent: 3890841 (1975-06-01), Brixy

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