Title: Electronic digital thermometer

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.

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Inventors: Iinuma, Kazuhiro (Yokohama, JP)
Abe, Yukito (Yokohama, JP)

Application Number: 856995
Filing Date: 1977-12-02
Publication_date: 1979-04-24
Assignee: Tokyo Shibaura Electric Co., Ltd. (JP)
Primary Class(es): 374/185 324/707, 331/66, 374/170, 377/25, 377/42
Other Classes:
US Patent Ref:

3872728	Mar, 1975	Joyce et al.	73/362.
3875503	Apr, 1975	Hayashi	73/362.
3890841	Jun, 1975	Brixy	73/362.

Other Refs:
Primary Examiner: Woodiel, Donald O.
Assistant Examiner:
Attorney: Finnegan, Henderson, Farabow & Garrett