Solid-state thermal sensor

The simplest is a semiconductor PN junction temperature sensor, such as a diode or transistor base - emitter Crank Position Sensors. If a constant current flow through the forward biased silicon PN junction forward voltage drop in temperature every 1 ℃ will reduce 1.8mV. Many semiconductor IC use this feature to measure temperature, including Maxim's MAX1617, National Semiconductor LM335 and LM74 and so on. Semiconductor sensor interface forms, from the voltage output to the serial SPI / micro-wire interface can be. Many different types of temperature sensors, through Car Sensors choice of software and hardware, will be able to find a suitable application of the sensor.