说明：  以三端稳压集成电路LM317 为基础 ,设计了一种16 级数控直流稳压电源 ,介绍了该电源中可调电阻的选取与 实现。该电源可用 TTL 电平直接驱动 ,调整方便 ,成本低而步进精度高 ,输出电压范围大。
(to three LM317 voltage regulator IC based design of a 16 NC DC Power Supply, introduced the Power adjustable resistance to the selection and implementation. The power supply can be TTL- level direct drive, adjust the convenience, low cost and high accuracy stepper, the large scope of the output voltage.)