The input impedance (Z_i) and the output impedance (Z_o) of an ideal transconductance (voltage controlled current source) amplifier are

An n-channel depletion MOSFET has following two points on its I_D - V_GS curve:

(i)V_GS = 0 at I_d = 12 mA and
(ii)V_GS = -6 Volts at Z_o =$$\infty $$

Which of the following Q-points will give the highest transconductance gain for small signals?

For the circuit shown in the following figure, the capacitor C is initially uncharged. At t = 0, the switch S is closed. The voltage V_C across the capacitor at t = 1 millisecond is

In the figure shown above, the OP-AMP is supplied with $$ \pm $$ 15V.

A regulated power supply, shown in figure below, has an unregulated input (UR) of 15 volts and generates a regulated output V o u t . out. .Use the component values shown in the figure. If the unregulated voltage increases by 20% the power dissipation across the transistor Q$$_1$$