Pressure sensor excitation circuitry diagram

Published:2011/4/26 2:50:00 Author:Nicole | Keyword: pressure sensor | From:SeekIC

The figure 1 is a pressure sensor excitation circuit. Figure1(a) is generic constant voltage excitation circuit, it is composed of Zener diode VD1, operational amplifier and LM741; Figure1(b) is constant current excitation circuit, its stability is decided by Rl一R4, so it should choose the resistance with low temperature coefficient. The temperature stability of this excitation circuit should be designed to 1/100 of sensor. Such as the temperature stability of sensor is 0.1%, then the excitation circuit is 0.001%.



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