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  • physical significance of alpha in an amplifier

    pratap singh, upendra

    Member

    Updated: Oct 22, 2024
    Views: 1.3K
    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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Replies

  • Anand Tamariya

    Member • 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

    Member • 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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