This circuit is use to build a thermometer which has -55 to 150°C sensing range. The ideal meter for this circuit is a 0-200uA digital ampere meter, which can show both positive and negative polarity. This will make the circuit suitable for indicating temperatures below 0°C. Here’s the figure of the circuit;
This circuit is based on LM134 and LM10 that has basically a current source with very accurate and consistent temperature coefficient, so many temperature sensing application find it suitable for the sensor. [Circuit diagram source: National Semiconductor Notes]
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