Question 3 (2 points): Given a differential amplifier as shown in the following figure, the transistors have the following parameters: $\beta$ = 100, $V_{BE,On}$ = 0.7V, $V_{CE,sat}$ = 0.2V and $V_A$ = $\infty$. The capacitors have very large values, $r_o$ = 100k$\Omega$.
$V_{CC}$ = 5 V
a. Perform DC analysis and compute Quiestcent point the transistors ($I_{CQ}$, $V_{CEQ}$).
b. If $V_1$ = $V_2$ = $V_{cm}$, compute $A_{cm}$ = $\frac{v_o}{V_{cm}}$
c. If $V_1$ = $\frac{V_{id}}{2}$, $V_{cm}$ = $-\frac{V_{id}}{2}$, compute $A_d$ = $\frac{v_o}{V_{id}}$
d. Compute CMRR of the above circuit.
