摘要
介绍了一种简易数控直流电流源的设计。该电流源主要由数字控制部分和恒流源产生电路部分组成。其中单片机为系统的核心控制器,此外还包括键盘输入模块、LCD液晶显示模块以及DA转换模块。在电流源中主通路上,选了两个功率比较大的模拟器件LM338和TIP122,能稳定可靠地输出2A的最大电流。
This paper introduces a kind of DC current supply that consists mainly of DC part and the constant current source analog circuit. The chip microprocessor is the core controller of the system, and the system also includes the keyboard input module, LCD display module and DA modular converter. In the main circuit of the DC supply, two larger power analogue devices of LM338 and TIP122are selected. All of these can ensure the system provide 2A maximal current output stably and reliably.
出处
《科技情报开发与经济》
2006年第15期280-281,共2页
Sci-Tech Information Development & Economy
关键词
单片机
D/A
数字控制
直流电源
chip microprocessor
D/A
digital control
DC.supply
