Question

A common emitter amplifier has a voltage gain of 50, an input impedance of `200 Omega` and an output impedance of `400 Omega`. Calculate the power gain of the amplifier.

Answer 1

Voltage gain `(beta)=((R_(0))/(R_(1)))=50 rArr beta = (50xxR_(L))/(R_(0))=(50 xx 200)/(400)=25`
Power gain `(beta^(2))=((R_(0))/(R_(1)))=(25)^(2)((400)/(200))=625 xx 2 =1250`.