电阻温度变送器的有源电桥电路  

An Active Bridge Circuit of Resistance Temperature Transmitter

作　　者：陈启昌[1] 

机构地区：[1]东北电力学院

出　　处：《化工自动化及仪表》1997年第4期42-44,共3页Control and Instruments in Chemical Industry

摘　　要：提出了一种供电阻温度变送器测温用的有源电桥电路，该电路采用了精密恒流源集成电路、集成电压跟随器和模／数转换器，它具有线性特性，完全消除了引线电阻及其温漂、电桥电压变动和电桥稳压电源的供电质量对测量准确度的影响。An active bridge circuit used by resistance temperature transmitter is designed.In this circuit,precision constant-current source integrated circuit,integrated voltage tracker and A/D converter are adopted.It is a linear circuit and the effects to accuracy caused by lead-line resistance,temperature drift and bridge voltage wave motion are cancelled completely.

关 键 词：电阻温度 变送器 有源电桥 集成电路 电桥 电压 

分 类 号：TM934.103[电气工程—电力电子与电力传动] TM938.403