physical significance of alpha in an amplifier

@pratap-singh-6xlmve • Oct 22, 2024

Oct 22, 2024

1.4K

hello friends,

what is the physical significance of the variable alpha in a transistor amplifier. Of course it represents the ratio of collector current to emitter current but what is the information that we actually derive out of this variable.

regards,
proffy

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Anand Tamariya

@anand-tamariya-DnfjEX • May 21, 2013

Helps in designing your electronic circuit. You can figure out how much base current is required to operate a load with certain current requirement or vice-versa.

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Jeffrey Arulraj

@jeffrey-xA7lUP • May 21, 2013

Alpha parameter relates Ie and Ic. And based on the Alpha value of the transistor we go for the approximation Ic=Ie

If alpha is small we can't go for this assumption

alpha is almost unity for BC107 and some low power transistors But it is not so for Power transistors

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