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In a common emitter amplifier , the load...

In a common emitter amplifier , the load resistance of the output circuit is 500 times the resistance of the input circuit. If ` alpha = 0.98 ` , then find the voltage gain and power gain .

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A
Given ` alpha = 0.98` and `R_"out" / R_"in" = 500 rArr beta = alpha /( 1- alpha) = 0.98 / (1 -0.98) = 49 `
(i) Voltage gain `= (beta) R_"out" / R_"in" = (49) (500) = 24500 `
(ii) Power gain `= (beta^(2)) R_"out" / R_"in" = (49)^(2) (500) = 1200500`
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