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Effect of temperature on transistor characteristics

Effect of temperature on transistor characteristics


Effect of temperature on transistor characteristics

As with diodes, temperature has negligible influence on the characteristics of transistors. So understand these effects and take measures in the circuit

To overcome is a very real problem. The effect of temperature on transistor characteristics usually takes into account the following three aspects:

1. Effect of temperature on ube the input characteristic curve shifts to the left as the temperature increases so that the ube will decrease when the IB is constant. Ube with temperature

The change law and diode is the same as the guide voltage, that is, temperature per 1 degrees Celsius, ube reduce 2~2.5mv.

2. The effect of temperature on ICBO ICBO is the reverse saturated of the collector knot, which is the same as the change of the temperature and the diode reverse current.

, that is, the temperature of 10 degrees Celsius per increase, icbo about one times. The variation of Iceo is roughly the same as that of ICBO. On the output characteristic graph, when the temperature

When the degree rises, the curve moves upwards.

3. Effect of temperature on beta the current amplification of the transistor is increased by the increase of temperature, and the change rule is that the temperature is increased by 1 centigrade.

, the value of the beta increases 0.5~1%. On the curve of output characteristic, the distance between curves increases with the increase of temperature.


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