作者信息
- 1. 东南大学自动化学院,江苏 南京 210018
- 折叠
摘要
设计了一种pA级精密微电流发生装置,包括电压输出电路、微电流发生电路和等电位电路,实现了 1pA至 1 μA的稳定输出,且误差小于 5%.该装置以MCU利用ADC采集反馈来调控DAC输出精密电压,再经过微电流发生电路进行V/I转换,将电压转换为恒定微电流,最后通过等电位电路保证输出的稳定.模拟和数字部分的供电采取隔离设计,以避免数字信号引起串扰.该装置为高精度微电流应用提供了可靠技术支持,以期推动微电流技术发展.
Abstract
This paper designs a precision micro-current generator of pA-level,which includes a voltage output circuit,a micro-current generation circuit,and an equipotential circuit.It achieves a stable output ranging from 1pA to 1 μA with an error of less than 5%.The device utilizes MCU to collect feedback through ADC to regulate the precise voltage output of DAC,and then converts the voltage into a constant micro-current through the micro-current generation circuit by V/I con-version.Finally,the equipotential circuit ensures the stability of the output.The power supply of the analog and digital parts is designed to be isolated to avoid crosstalk caused by digital signals.
关键词
微电流/V/I转换/皮安级/高精度Key words
micro-current/V/I conversion/pA-level/high-precision引用本文复制引用
出版年
2024
NETL
NSTL
万方数据