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Research on Design of Weak Current Measurement System Based on I-V Convertor
Proceedings of the 2017 2nd International Conference on Materials Science, Machinery and Energy Engineering (MSMEE 2017)
In this paper, after introducing several methods of measuring weak current, a weak current measurement system is designed which consists of an ultra-low bias current operation amplifier ADA4530 based on the trans-impedance amplifier topology, a secondary amplifier, an eight-order Butterworth low-pass switched-capacitor filter and other modules. Special consideration on the low noise pre-amplifier in practical applications has been proposed particularly. The simulation results of noisedoi:10.2991/msmee-17.2017.159 fatcat:vkamgutypnbdxol3rjvm55p6mu