Arrangement for measuring temperatures

Details Arrangement for measuring temperatures Arrangement for measuring temperatures

1974-02-06

1976-03-09

Queisser, Richard C.

Electricity: power supply or regulation systems

Remote sensing

73362AR, 323 75B, 323 75N, G01K 724

Patent

active

039434346

ABSTRACT:
An improved arrangement for measuring temperatures in which a bridge containing two temperature dependent resistances is used. A first branch of the bridge consists of a parallel connection of two series circuits each consisting of a constant resistance and a temperature-dependent resistance and a second branch of the bridge consists of a series circuit of two constant resistances. Means are provided to impress a constant current on the first bridge branch so that the current divides between the two constant resistances at the input and flows out between the two temperature dependent resistances. At the second bridge branch, a voltage corresponding to the voltage generated in the first bridge branch is impressed. A junction of the second bridge branch is at the same potential as the current sink of the first bridge branch. The output for measuring a temperature proportional voltage is taken across the junction of the two constant resistances in the second bridge branch and the junction between one constant and one temperature dependent resistance in the first bridge branch.

REFERENCES:
patent: 3278834 (1966-10-01), Perino
patent: 3316765 (1967-05-01), Trolander et al.
patent: 3541857 (1970-11-01), Massey
patent: 3568044 (1971-03-01), Elazar
patent: 3738174 (1973-06-01), Waldron
patent: 3743926 (1973-07-01), Yerman
Oswald; R. K., Thermistor Temperature to Current Transducer, in IBM Technical Disclosure Bulletin, Vol. 7, No. 12, May, 1965, pp. 1124-1126.

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