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zee824
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i have been asked in my lab report to calculate alpha in a bjt common emmitter circuit using 2 different formulas and explain why one is misleading.β=Ic/Ib= 537.1*10^-6/6.743*10^-6≈85
α= Ic/Ie=573.1*10^-6/566.357*^-6≈1.011
α=β/β +1≈0.988
i have worked out the two values of alpha where our beta is roughly 85 however I am not sure why alpha when calculated from Ic/Ie is missleading.
i have tried to search on the internet however i have found nothing yet and same with my lecture notes.
any help is very much appreciated and i applogise if this is in the wrong section.
thanks
zee
α= Ic/Ie=573.1*10^-6/566.357*^-6≈1.011
α=β/β +1≈0.988
i have worked out the two values of alpha where our beta is roughly 85 however I am not sure why alpha when calculated from Ic/Ie is missleading.
i have tried to search on the internet however i have found nothing yet and same with my lecture notes.
any help is very much appreciated and i applogise if this is in the wrong section.
thanks
zee
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