1. Thermistor properties
Non-linear resistors are components whose electrical resistance
varies non-linearly with a physical variable such as temperature,
electric field or light. In this article, we'll confine ourselves
to components whose non-linearity is essentially linked to the influence
of temperature: NTC (negative temperature coefficient) and PTC (positive
temperature coefficient) thermistors.
NTC thermistor: ceramic material whose
electrical resistance decreases exponentially and monotonically with
temperature. In other words, the material's resistance has a negative
temperature coefficient with temperature (figure 1).
PTC thermistor: ceramic material whose resistance
rises sharply over a certain temperature range. The resistor has a
positive...
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Thermistor properties