Research on Design of Weak Current Measurement System Based on I-V Convertor

Zicheng Guo, Guofu Liu, Shilin Wu, Mao Li
2017 Proceedings of the 2017 2nd International Conference on Materials Science, Machinery and Energy Engineering (MSMEE 2017)   unpublished
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 noise
more » ... stics have shown that the system can realize the weak current measurement of μA~pA wide range.
doi:10.2991/msmee-17.2017.159 fatcat:vkamgutypnbdxol3rjvm55p6mu