Thu February 24, 2011 By: Padmini Kommu

Pls explain the process of amplification of any signal though a common emitter transistor configuratuion in brief without a diagram

Expert Reply
Mon February 28, 2011
Dear student,
In a common emitter amplifier, the base-emitter current causes a corresponding collector-emitter current,  (beta gain) or collector resistance over emitter resistance, which ever is less. Since this ratio is usually greater than one, the differential collector current is greater than the differential base current. This results in amplification of the base signal. 

As you increase the base-emitter current, the collector-emitter current also increases. This results in the collector being pulled towards the emitter, with the result that the differential collector voltage decreases. which results in inversion of the base signal.

Hope this helps.
Thanking you
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