The voltage gain of a common- emitter amplifier, AV, can be defined as

A)$ \mathrm{AV}=\frac{{ }^{I} \mathrm{e}^{\mathrm{R}} \mathrm{C}}{\mathrm{I}_{e}{r^{\prime}} _{e}} $.

B)$ \mathrm{AV}=\frac{\mathrm{v}_{\mathrm{b}}}{\mathrm{V}_{\mathrm{C}}} $.

C)AV = IC × RC.

D)$ A V=\frac{{R }_{c} }{R_{C}+1} $.

Question

The voltage gain of a common- emitter amplifier, AV, can be defined as

A)$ \mathrm{AV}=\frac{{ }^{I} \mathrm{e}^{\mathrm{R}} \mathrm{C}}{\mathrm{I}_{e}{r^{\prime}} _{e}} $.

B)$ \mathrm{AV}=\frac{\mathrm{v}_{\mathrm{b}}}{\mathrm{V}_{\mathrm{C}}} $.

C)AV = IC × RC.

D)$ A V=\frac{{R }_{c} }{R_{C}+1} $.

Quizplus · Accepted Answer

The voltage gain (AV) of a common-emitter amplifier is defined as the ratio of the output voltage to the input voltage. The correct formula is $ \mathrm{AV}=\frac{{ }^{I} \mathrm{e}^{\mathrm{R}} \mathrm{C}}{\mathrm{I}_{e}{r^{\prime}} _{e}} $, which represents the output voltage change over the input voltage change, where $R_C$ is the load resistance in the collector circuit, and $r'_e$ is the dynamic emitter resistance. This formula correctly captures the relationship between the output and input voltages in terms of the circuit components.

The Voltage Gain of a Common- Emitter Amplifier, AV, Can AV=IeRCIer′e \mathrm{AV}=\frac{{ }^{I} \mathrm{e}^{\mathrm{R}} \mathrm{C}}{\mathrm{I}_{e}{r^{\prime}} _{e}} AV=Ie​r′e​IeRC​

The Voltage Gain of a Common- Emitter Amplifier, AV, Can $\mathrm{AV}=\frac{{ }^{I} \mathrm{e}^{\mathrm{R}} \mathrm{C}}{\mathrm{I}_{e}{r^{\prime}} _{e}}$