DC-Amplifier-Input-Offset-Voltage Control in a Constant-Temperature Thermoresistive-Sensor-Measurement Instrument
G.A.L. Araujo, Raimundo C. S. Freire, Jos Felcio da Silva, Sebastian Yuri Cavalcanti Catunda, Glauco Filho Fontgalland · IEEE Transactions on Instrumentation and Measurement · 2007
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