Temperature sensing circuit

Details Temperature sensing circuit Temperature sensing circuit

1980-01-25

1981-12-15

Gill, James J.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

G01K 700

Patent

active

043052886

ABSTRACT:
An improved temperature sensing circuit is disclosed comprising a power supply which forward biases a diode sensing element to control the gain of an operational amplifier. A temperature change causes the resistance of the diode to change, which changes its current flow. Since the anode of the diode is connected to the operational amplifier, the result is that the operational amplifier has a very linear output voltage proportional to temperature.

REFERENCES:
patent: 4123938 (1978-11-01), Hamilton
patent: 4133208 (1979-01-01), Parlanti
Three Part Article by J. Williams, "Designer's Guide to: Temperature Sensing" EDN, May 5, May 20 & Jun. 20, 1977.

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