ch $8-9$

$*$D$11\mathrm{.}5$ For the transistors in the circuit in Figure P$11\mathrm{.}5,$ the parameters are $=100$ and $V_{BE}(on)=0\mathrm{.}7V.$ The Early voltage is $V_A=$ for $Q_1$ and $Q_2,$ and is $V_A=50V$ for $Q_3$ and $Q_4.($a$)$ Design resistor values such that $I_3=400A$ and $V_{CE1}=V_{CE2}=10V.($b$)$ Find $A_d,A_{cm},$ and $CMR{R}_{dB}$ for a one$-$sided output at $v_{O2}.($c$)$ Determine the differential$-$ and common$-$mode input resistances.

rigure r $.$