What is α and β in …
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Posted by Insha Khalid 4 years, 10 months ago
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Yogita Ingle 4 years, 10 months ago
The current gain in the common-emitter circuit is called Beta (β). Beta is the relationship of collector current (output current) to base current (input current). To calculate beta, use the following formula :
β=ΔIC/ΔIB
The current gain in the common-base circuit is calculated in a method similar to that of the common emitter except that the input current is IE not IB and the term Alpha (α) is used in place of beta for gain. Alpha is the relationship of collector current (output current) to emitter current (input current). Alpha is calculated using the formula :
α=ΔIC/ΔIE
Thus, α=β/β+1
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