List of top Electronics and Communication Engineering Questions asked in TS PGECET

Which of the following is correct with reference to the given diode limiter circuit?

The incorrect statement with respect to thin-film integrated circuits is

For enhancement MOSFET, the gate-source voltage must have

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 diode current equation is

The region of the V-I characteristic of JFET where \(I_D\) (drain current) is fairly constant is referred as

The forward resistance for silicon diode carrying a current of \(20~mA\) is

The maximum time for the diode to switch from ON to OFF is called

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

The Fourier Transform of the sampled signal is given by

Determine the conditions on the sampling interval \(T\) such that \[ x(t)=\frac{\cos(2\pi t)\sin(\pi t)}{\pi t} + \frac{2\sin(6\pi t)\sin(2\pi t)}{\pi t} \] is uniquely represented by the discrete-time sequence \(x[n]=x(nT)\).

\(N\)-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 \[ x(n)=a^n(\sin\omega_0 n)u(n) \]

A square-law system is/has

If the input is \[ x[n]=-u[n]+2u[n-3]-u[n-6] \] and impulse response is \[ h[n]=u[n+1]-u[n-10] \] of an LTI system, then the output \(y[n]\) in the interval \(5\le n\le9\) is

Overlap in the shifted replicas of the original spectrum after sampling is termed

The Fourier Transform of \[ \frac{d}{dt}\left(e^{-at}u(t)\right) \] is

Find the inverse Fourier Transform of \[ X(j\omega)=\frac{j\omega+1}{(j\omega)^2+5j\omega+6}. \]

The Fourier transform of a signum function is

The Fourier transform of a function \(f(at)\) is given by