A highly linear single p-n junction temperature sensor

Author

Freire, Raimundo Carlos Silverio ; Daher, Sergio ; Deep, Gurdip Singh

Author_Institution

Dept. of Electr. Eng., Federal Univ. of Paraiba, Campina Grande, Brazil

Volume

43

Issue

2

fYear

1994

fDate

4/1/1994 12:00:00 AM

Firstpage

127

Lastpage

132

Abstract

A temperature sensor based on the use of two forward-biased p-n junctions is known to exhibit good linearity. An alternative sensor configuration, based on the same principle, but employing only one p-n junction is presented in this paper. The forward current through the p-n junction is switched alternately between two fixed values, and the difference between the corresponding voltages is shown to vary linearly with temperature. This scheme eliminates the problems associated with close matching required for the two p-n junction sensors. Experimental results obtained with the proposed scheme are presented. A configuration to exploit the temperature dependence of the p-n junction incremental resistance is also presented

Keywords

electric sensing devices; p-n junctions; temperature measurement; current switching; electric sensor; forward-biased p-n junction; incremental resistance; linear single p-n junction temperature sensor; temperature dependence; temperature measurement; Biomedical measurements; Biosensors; Current measurement; Linearity; P-n junctions; Silicon; Temperature dependence; Temperature measurement; Temperature sensors; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.293408

Filename

293408