Temperature sensing

Details Temperature sensing Temperature sensing

1983-02-28

1985-01-22

Jones, Larry

Stoves and furnaces

Tool having fluid fuel burner

Soldering iron

126422, 126437, F24J 302

Patent

active

044945264

ABSTRACT:
A temperature differential measuring circuit includes first and second temperature sensitive transducers disposed in corresponding first and second legs of a bridge circuit. Disposed in third and fourth legs of the bridge circuits are fixed resistors. An operational amplifier has its input terminals connected to the output terminals of the bridge circuit with its output terminal connected to one of the fixed resistors so that that fixed resistor is in feedback relation between the input and output of the amplifier. The transfer function of this bridge circuit is less temperature dependent than the transfer functions of conventional voltage bridge circuits.

REFERENCES:
patent: 3998207 (1978-11-01), Watt
patent: 4125107 (1978-11-01), Nurnberg
patent: 4126122 (1978-11-01), Bross
patent: 4173304 (1979-11-01), Johnson
patent: 4184635 (1980-01-01), Bloomfield
patent: 4227515 (1980-10-01), Jacob et al.
patent: 4339930 (1982-07-01), Kirts

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