数控恒流源的设计与实现  

作　　者：熊建[1] 

机构地区：[1]成都电子机械高等专科学校通信工程系

出　　处：《成都电子机械高等专科学校学报》2008年第1期16-19,共4页Journal of Chengdu Electromechanical College

摘　　要：恒流源在实际工程中是一种用途广泛的检测设备。本设计基于AT89s51作为核心控制模块,通过D/A变换实现输出电流可调,采用精密运算放大器和达林顿管进行扩流,设计出了能精确输出20mA～2000mA数控可调直流恒流源。Const current source is a widely used detection facilities in engineering. This design is based AT89s51 clip as the core of control, using D/A conversion to perform the transfer of the output current, adopting precise operational amplifier and Darlington transistor to amplify the current. At last We designed the digital controlled const current source with precise output from 20mA to 2000mA.

关 键 词：AT89S51 恒流源 D/A 

分 类 号：TN710[电子电信—电路与系统]