The Design of Digital Direct Current Source Based on Nios Ⅱ

摘要：

　　In this paper,a digital direct current source based on Nios Ⅱ is studied.The system adopts FPGA as hard core and the main circuit of constant current source consisting of operational amplifier LM358 and power Field Effect Transistor (FET) IRF530.In addition,12 bit D/A chip MAX531 and 12 bit A/D chip TLC549 are used to monitor the output current.The system outputs current from 20mA to 2000mA with 0.5mA step level,the set current value and actual output current value can be displayed by LCD.Result shows that the system has characteristics of high precision,good stability,small size and high integration.

关键词： Nios Ⅱ VHDL FPGA constant current source

作者: Qingqing Fu Aiping Wu

作者单位: School of Electronics and Information Engineering,Yangtze University,Jingzhou,Hubei,China Institute of Geophysics &Geomatics China University of Geoscineces,Wuhan,Hubei,China

会议类型: 国际会议

会议名称: 2012 2nd International conference on Machinery Electronics and Control Engineering (2012年第二届国际机械电子与控制工程会议(ICMECE 2012))

会议地点: 济南

会议语种:英文

页码: 316-319

在线出版日期: 2012-12-29（万方平台首次上网日期，不代表论文的发表时间）