An n-p-n transistor power amplifier in C-E co | vedclass

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(C) In a Common-Emitter $(C-E)$ configuration, the transistor acts as an amplifier for both current and voltage. $1$. Current gain $(\beta = I_C / I_B

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both current and voltage amplifications

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(C) In a Common-Emitter $(C-E)$ configuration, the transistor acts as an amplifier for both current and voltage. $1$. Current gain $(\beta = I_C / I_B)$ is typically much greater than $1$. $2$. Voltage gain $(A_V = \beta 	imes (R_L / R_{in}))$ is also significantly greater than $1$ because the output resistance $(R_L)$ is much higher than the input resistance $(R_{in})$. $3$. Since both current and voltage are amplified, the power gain $(A_P = A_V 	imes \beta)$ is also significantly greater than $1$. Therefore, the $C-E$ configuration provides both current and voltage amplification.

An $n-p-n$ transistor power amplifier in $C-E$ configuration gives

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