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热敏电阻在晶体管电路的温度补偿,温度测量和控制或通讯机的自动增益调节等方面,早就获得了应用。热敏电阻主要是由过渡金属氧化物制成的半导体电阻器件,它们的特点是随着温度的升高,元件的电阻值显著减少。严格的说,这些元件应该叫做负温度系数NTC(Negative TemperatureCoefficient)热敏电阻,以区别于电阻值随温度上升而增加的钛酸钡系列的半导体陶瓷——正温度系数PTC(Positive Tempera-ture Coefficient)热敏电阻。
Thermistors have long been used in temperature compensation, temperature measurement and control of transistor circuits, or automatic gain control of communication devices. Thermistors are mainly semiconductor resistance devices made of transition metal oxides, and their feature is that as the temperature rises, the resistance of the device is significantly reduced. Strictly speaking, these components should be called NTC (Negative Temperature Coefficient) thermistor, in order to distinguish the resistance value increases with temperature increase barium titanate series of semiconductor ceramic - PTC (Positive Tempera-ture Coefficient) ) Thermistor.