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.$1$. Current gain $(\beta)$ is defined as the ratio of collector cu

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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.$1$. Current gain $(\beta)$ is defined as the ratio of collector current $(I_C)$ to base current $(I_B)$, which is typically much greater than $1$.$2$. Voltage gain $(A_V)$ is defined as the product of current gain $(\beta)$ and the ratio of output resistance to input resistance $(R_{out}/R_{in})$.$3$. Since both current gain and voltage gain are greater than $1$ in a $C-E$ amplifier, the device provides both current and voltage amplification.$4$. Consequently, it also provides significant power amplification.

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

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