Temperature detector

Details Temperature detector Temperature detector

1983-12-02

1985-10-29

Frankfort, Charles

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

374183, G01K 700

Patent

active

045498180

ABSTRACT:
A temperature detector made by a CMOS integrated circuit. The temperature detector comprises a first constant voltage circuit for producing a first constant voltage, a second constant voltage circuit applied with the first constant voltage for producing a second constant voltage, and a ring oscillator applied with the second constant voltage for producing an output voltage dependent of ambient temperature. Each constant voltage circuit has a standard resistor in the form of a diffusion resistor, a current-mirror circuit as a standard voltage generating circuit, and a voltage follower, and the ring oscillator has a delay resistor formed by a MOS transistor.

REFERENCES:
patent: 3617859 (1971-11-01), Dobkin et al.
patent: 3904988 (1975-09-01), Hsiao
patent: 3978431 (1976-08-01), Lattin
patent: 4068134 (1978-01-01), Tobey, Jr. et al.

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