LM134-LM10 Thermometer/Temperature Sensor

Using LM134 and LM10 integrated circuits, we can 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.  LM134 is basically a current source with very accurate and consistent temperature coefficient, so many temperature sensing application find it suitable for the sensor. Here is the schematic diagram of the circuit:

[Circuit’s schematic diagram source: National Semiconductor Application Note]