高精度数控直流电流源  

High Precision Digital Control DC Current Source

作　　者：王永德[1] 赵宏才[1] 马石岩[1] 张召友[1] 刘士军[1] 

机构地区：[1]青岛理工大学自动化工程学院,山东青岛266033

出　　处：《微电子学与计算机》2007年第2期120-123,共4页Microelectronics & Computer

摘　　要：以单片机89c51为中心控制器构成的直流电流源,控制电路的采样信号和控制信号传输通道分别用ADC7135和AD7541A来实现。使得控制精度达到了步进1mA,量程20mA～2000mA,纹波电流≤0.2mA,远远的超过题目要求。This paper introduces the DC current source with main contoller that is single-chip computer 89c51. The transport channels of sample and control signals is control circuits. The ADC7135 is used to the sample signal circuit and AD7541A is used to control signal circuit. The technique indexes arrive to control precision of step lmA, measure range＂ of 20mA-2000mA, vein wave electric current within 0.2mA. These indexes have largelly exceeded demand indexes.

关 键 词：电流源 单片机 ICL7135 AD7541芯片 

分 类 号：TN4[电子电信—微电子学与固体电子学]