List of top Electronics and Communication Engineering Questions

Under steady-state conditions, the clamping theorem states that
The correct option with respect to IC 723 general purpose regulator is
Class AB operation is often used in power amplifiers in order to
Calculate the circuit output resistance in the common drain amplifier with \[ r_d=100~k\Omega,\qquad g_m=990~\mu S \] and \[ R_L=10~k\Omega. \]
The non-inverting amplifier circuit behaves very similar to the voltage follower circuit except that
In IC 555 timer, three \(5k\Omega\) internal resistors act as voltage divider, which provides bias voltage to the upper comparator and to the lower comparator in the order of (in \(V_{CC}\)).
In Emitter current bias, if \[ R_1||R_2 \] is very much larger than \[ R_E, \] then the circuit performance becomes like
In discrete transistors the substrate is normally used as
Which of the following is correct with reference to the given diode limiter circuit?
Match the following:
For enhancement MOSFET, the gate-source voltage must have
The incorrect statement with respect to thin-film integrated circuits is
The diode current equation is
Find the value of emitter current for a transistor with \[ \alpha_{dc}=0.98 \] and \[ I_{CBO}=5~\mu A \] when the base current is measured as \[ 100~\mu A. \]
The maximum time for the diode to switch from ON to OFF is called
The forward resistance for silicon diode carrying a current of \(20~mA\) is
The region of the V-I characteristic of JFET where \(I_D\) (drain current) is fairly constant is referred as
Determine the z-transform corresponding to the given pole-zero plot.
A linear time-invariant system is characterized by \[ H(z)=\frac{3-4z^{-1}} {1-3.5z^{-1}+1.5z^{-2}}. \] Which of the following is not correct?
If all the frequency components of the input signal undergo the same time delay, then the value of the group delay of the system is
The charge carriers move gradually from the region of high carrier density to low carrier density constitutes an electric current is
A typical resistance value for a 1-cubic centimeter sample of semiconductor is
\(N\)-point DFT using FFT algorithms (radix-2) requires the following complex multiplications
A relaxed linear time-invariant system with impulse response \[ h(n)=a^n u(n), \qquad |a|<1 \] when the input is a unit step sequence, \[ x(n)=u(n), \] then the output \(y(\infty)\) of the system is
Determine the z-transform of the signal \[ x(n)=a^n(\sin\omega_0 n)u(n) \]