Dear Tutor, please attempt if you realy now the exact way to solve it. Mostly every one did it in wrong way. Please don't copy and edit someones wrong answer directly.
This linear voltage regulator has the following components values and device characteristics:
Op amp, $A_1$ is ideal
$\beta$ = 20, $V_r$ = 25 mV, $V_{CE(sat)}$ = 0.3 V, $V_A$ = 30 V
for $Q_1$
$V_z$ = 6.7 V at $I_z$ = 1 mA, $R_z$ = 10 k$\Omega$ for $D_1$.
$R_1$ = 3.3 k$\Omega$
$R_L$ = 4 $\Omega$
a) Given $V_{DD}$ = 10V, what is the nominal output voltage, $V_{OUT}$?
(4 points)
b) If $V_{DD}$ has a 1V p-p ripple, what will be the ripple voltage at the output?
(8 points)
c) Find the power efficiency, $\eta$ of this voltage regulator.
(8 points)
