低纹波高精度数字电流源的设计  

Design of Digital Current Source with Low Ripple and High Precision

作　　者：胡山[1] 张兴会[1] 耿丽清[1] 

机构地区：[1]天津工程师范学院,300222

出　　处：《微计算机信息》2007年第02S期206-207,153,共3页Control & Automation

基　　金：教育部科学技术研究重点项目(项目编号:204010)

摘　　要：本文介绍了一种低纹波高精度数字电流源,通过扩流晶体管、高精度运算放大器反馈电路和数字PI调节器闭环控制实现了输出电流纹波小、精度高。该电流源控制方便、显示数据量大,性能稳定、输出功率易于扩展。This paper introduces the digital current source with low ripple and high precision.Low ripple and high precision are accomplished by current-enlarging transistor and feedback circuit of precise operational amplifier and digital PI closed-loop control. The current source is used conveniently, of which the LCD displays more data and the output power is convenient to be enhanced, of which the performance is stable.

关 键 词：纹波 精度 反馈控制 数字PI调节器 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]