基于无损全波整流电路的LVDT信号调理电路设计

摘要

提出了一种用模拟单刀双掷开关实现的无损全波整流电路.该电路的优势是不需二极管和匹配电阻,克服了二极管整流电路的误差问题.同时,基于该无损全波整流电路提出了一种五线制LVDT传感器信号调理电路设计方案,并搭建了测试平台对该电路的功能性能进行了测试,结果表明该设计方案具有较高的测试精度,并且在理论上,该方案也可应用其他类型的LVDT传感器.%A lossless precision rectifier circuit based on analog SPDT switch was presented in this paper .The advantage of this circuit is not required using diodes or matched resistors ,that overcome the problem of error diode rectifier circuit .And a five-wire LVDT signal conditioning circuit was designed based on this improved circuit .An experimental platform was built up for function and performance test of the LVDT signal conditioning circuit .The analysis on the experimental results shows that the LVDT signal conditioning circuit has high test precision and the scheme can use other type LVDT sensor in theory .