Question

Consider the circuit shown in the figure below:

The value of voltage gain $A_V=\frac{V_o}{V_i}$ is equal to $(\text{Assume}{V}_{Th}=25V)$

• A. $150$
• B. $100$
• C. $25$
• D. $75$

Answer 1

The correct option is A $150$

$g_{vs}=\frac{I_C}{V_{Th}}=\frac{0.5}{0.025}=20\frac{mA}{V}$
The value of $A_V=g_M{R}_C$
$20\times {10}^{-3}\times 7.5\times {10}^3$
$=150\frac{V}{V}$