精品文档---下载后可任意编辑摘 要: 该数控直流电流源以精密压控电流源为核心、用单片机、DAC 组成控制电路,引入“S 类”反馈控制功率放大电路,实现超精密电流控制、具备精准的扩流能力、低失调、有步进、同时带有丰富扩展功能的精密电流源
经过ADC 采样,完成输出电流显示功能,并使输出范围覆盖 0~2A,是理想的电流源解决方案
关键词: 精密电流源 低失调 S 类功率放大器 Abstract:The direct current source of numerical control bases on accurate VCCS,using MCU and DAC as controller kernel, importing circuit of power amplification of type S with feedback control; achieves ultra accurate current control;haslow offset and excellentcapacity for current enlarging; has step by step motion
At the same time,it provides abundance extended functions
According to the ADC sampling, it carries out the function of displaying the current output, meanwhile it achieves a range of 0 to 2A
Above all, it is an ideal solution of current source
Keyword: accurate current source , low offset ,