Electronic thermometer

Details Electronic thermometer Electronic thermometer

1987-04-10

1989-07-04

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

374172, G01L 722, G01L 724

Patent

active

048446238

ABSTRACT:
An electronic thermometer includes: an oscillator capable of changing from a connection between a reference and a capacitor and a resistance bulb and the capacitor. A counter is used for counting the oscillation frequency of the oscillator, and a clock is used to measure the time needed for the counter to count up to a specified number. The thermometer uses a memory circuit for preliminarily storing data to be used in a linearization process. A control circuit is included for linearizing the temperature to be detected by suppressing certain count pulses on a count by count basis according to data stored in a one-bit ROM. The temperature is then displayed by a display device.

REFERENCES:
patent: 3793630 (1974-02-01), Meijer
patent: 3824585 (1974-07-01), Meijer
patent: 4031530 (1977-06-01), Aneshansley
patent: 4045658 (1977-08-01), Peltola et al.
patent: 4210024 (1980-07-01), Ishiwatari
patent: 4559954 (1985-12-01), Murase
patent: 4602871 (1986-07-01), Hanaoka

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