精选优质文档-倾情为你奉上摘要：本设计以AT89S52为核心，通过A/D、D/A转换、V/I转换及独特的算法实现了高精度的，电流输出范围为20mA2000mA的数控直流电流源。该电流源具有电流可预置，1mA步进，同时显示给定值和实测值等功能。关键字：89S52，数控电源，V/I转换Numerical Controlled Constant-Current SourceAbstract: The paper expounds the design of the numerical controlled constant-Current source.The system core is AT89s52.The A/D D/A V/I converts and the specific arithmetic is used to carry out high precision and the current output range from 20mA to 2000mA.The source realizes that the outpu
