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

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5 Author(s)
Araujo, G.A.L. ; Electr. & Comput. Eng. Dept., Fed. Univ. of Para, Belem ; Freire, R.C.S. ; Jose Felicio da Silva ; Catunda, S.Y.C.
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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

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Instrumentation and Measurement, IEEE Transactions on  (Volume:56 ,  Issue: 3 )