The temperature coefficient of the regulator diode α: α indicates the amount of change in temperature per change in temperature per change. The tube having a stable voltage of less than 4V has a negative temperature coefficient (belonging to the Zener breakdown), that is, the temperature of the stable voltage is lowered (the temperature is increased by higher energy); the temperature of the stable voltage is greater than 7V has a positive temperature coefficient (belonging to Snow buckle breakdown), that is, the temperature increases when the temperature is raised (the temperature makes the atom amplitude, hinders the carrier movement); and the tube between the stable voltage is very small, the temperature coefficient is very small, approximation is zero (Zener breakdown and avalanche breakdown).、
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