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29 天
MSP430F149单片机实现温控仪
为了克服铂电阻的非线性特点,在信号调理电路中加入负反馈非线性矫正网络。如图2所示,铂电阻选用标称值为100Ω的RT100作为温度传感器。A1,A2和A3采用低温漂运放OP07,由于有电流流经铂电阻传感器,所以当温度为0℃时,在铂电阻传感器上有压降,这个电压为 ...
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