Temperature detection method and apparatus

Details Temperature detection method and apparatus Temperature detection method and apparatus

1988-06-01

1990-09-25

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Increasing converter resolution

341118, 341155, H03M 120

Patent

active

049596519

ABSTRACT:
A temperature detector including a temperature sensor to generate an analog voltage corresponding to a temperature detected thereby. The temperature detector is provided with an A/D conversion device to generate digital temperature data corresponding to the analog voltage input thereto, a reference voltage range setting device to set the reference voltage range to the A/D conversion device, and a reference voltage range changing device. The A/D conversion device compares the analog voltage with the reference voltage which varies within the set reference voltage range. The reference voltage range is automatically changed by the reference voltage range changing device not only to obtain a desired resolution of temperature in a normal operating mode, but also to detect a malfunction of the temperature sensor in a malfunction detection mode.

REFERENCES:
patent: 4216675 (1980-08-01), Nagata et al.
patent: 4575806 (1986-03-01), Aldrich et al.
User's Manual of TLCS-42,47,470, published by Toshiba Corp., publication date: Apr., 1986.

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