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Low Power Wide Temperature and High Accuracy Programmable Current Source Based on MSP430F5529
Author(s): 
Pages: 81-84
Year: Issue:  8
Journal: Automation & Instrumentation

Keyword:  current sourcefeedback controlanalogue switch;
Abstract: 由于一般的恒流源存在调节范围小、稳定性差等缺点,该文采用MSP430F5529低功耗单片机为控制核心,利用闭环控制原理,电路组成闭环负反馈进行稳流,克服了元器件老化、温漂等原因造成的输出误差.电流源支持0~20mA,0~2 mA,0~200μA3个档可调、输出电流可顸置、输出电流信号可直接显示和电阻测量等功能.实验结果表明该恒流源精度高、功耗低、稳定性好、输出范围宽.
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