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许多应用利用精密电流源提供恒定电流,包括工业过程控制、仪器仪表、医疗设备和消费电子产品。例如,过程控制系统利用电流源提供电阻温度检测器（RTD）所需的激励电流; 数字万用表利用电流源测量未知电阻、电容和二极管; 长距离信息、传输广泛使用电流源来驱动4mA至20mA电流环路。
差动放大器构成精密电流源的核心
【摘 要】
：
许多应用利用精密电流源提供恒定电流,包括工业过程控制、仪器仪表、医疗设备和消费电子产品。例如,过程控制系统利用电流源提供电阻温度检测器（RTD）所需的激励电流; 数字万用
【机 构】
：
ADI公司
【出 处】
：
世界电子元器件
【发表日期】
：
2010年6期
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