Define the following terms: (i) Stabilization (ii) Thermal runaway

Define the following terms: (i) Stabilization (ii) Thermal runaway
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Answer :

Stabilization: The process of making operating point independent of temperature changes or variation in transistor parameter is known as stabilization. The maintenance of the operating point stable is called the stabilization.

Thermal runaway:

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1.The reverse saturation current in semiconductor devices changes with temperature. The reverse saturation current approximately doubles for every 10 degree rise in temperature. 2.As the leakage current of transistor increases, collector current increases. 3. The increase in power dissipation at collector base junction. 4.This in turn increases the collector base junction causing the collector current current to further increase. 5.This process becomes cumulative. and it is possible that the ratings of the transistor are exceeded. If it happens, the device gets burnt out. This process is known as “Thermal Runaway”.

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