DC-Amplifier-Input-Offset-Voltage Control in a Constant-Temperature Thermoresistive-Sensor-Measurement Instrument

Author

Araujo, Guilherme Augusto Limeira ; Freire, Raimundo Carlos Silvério ; Da Silva, José Felício ; Catunda, Sebastian Yuri Cavalcanti ; Fontgalland, Glauco

Author_Institution

Electr. & Comput. Eng. Dept., Fed. Univ. of Para, Belem

Volume

56

Issue

3

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

778

Lastpage

783

Abstract

In this paper, the effect of dc amplifier input offset voltage on the static and dynamic performances of a generic constant-temperature thermoresistive-sensor-feedback circuit (CTC) is reviewed. A negative-feedback automatic control circuit for the input offset voltage is proposed in order to assure a stable operation of the CTC and to obtain optimal response time. Experimental evaluation results of the proposed circuit performance are presented

Keywords

amplifiers; circuit feedback; temperature measurement; temperature sensors; voltage control; DC-amplifier; automatic control circuit; constant-temperature thermoresistive-sensor; feedback circuit; input-offset-voltage control; measurement instrument; negative-feedback; Automatic control; Automatic voltage control; Circuits; Delay; Fluid flow measurement; Instruments; Operational amplifiers; Temperature sensors; Thermal sensors; Thermoresistivity; Constant-temperature sensor instrument; offset-voltage control;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2007.894800

Filename

4200974