Electronics and Communication Engineering (ECE)

The PSD and the power of a signal g(t) are respectively S_g(ω) and P_g, the PSD and the power of signal a.g(t) are respectively

A region of negative differential resistance is observed in the current voltage characteristics
of a silicon PN junction if

A source generates 4 messages. The entropy of the source will be maximum when

A silicon pn junction with doping profile of N_a  =10¹⁶  cm^-3 and N_d =10 ¹⁵ cm^-3 has a cross sectional area of 10^-2 cm². The length of the p - region is 2 mm and length of the n - region is 1 mm. The approximately series resistance of the diode is

The pole-zero diagram of a causal and stable discrete-time system is shown in the figure. The
zero at the origin has multiplicity 4. The impulse response of the system is h[n]. If h[0] = 1,
we can conclude

It is given that  y'' + 2y' + y = 0 y(0) = 0 , y(1) = 0 y(0.5) is _______

If wave form is given only for I period then

 

 

If f(t) is an even function, then what is its fourier transform F (jω)?

Two p⁺ n silicon junction is reverse biased at V_R = 5 V. The impurity doping concentration in junction A are N_a = 10¹⁸ cm^-3and N_d = 10 ¹⁵ cm^-3, and those in junction B are N_a = 10¹⁸ cm^-3  and N_d = 10¹⁶ cm^-3. The ratio of the space charge width is

Which among the following are the stable discrete time systems?

1. y(n) = x(4n)
2. y(n) = x(-n)
3. y(n) = ax (n) + 8 
4. y(n) = cos x(n)

Find the rank of matrix 

The network function  represents an

The potential distribution is given by V = 10y⁴ + 2x³. If ε0 is permittivity of free space what is charge density (ρ) at (2, 0)

Match List-I with List-ll and select the correct answer using the codes given below the lists:
List-I 
A. Immersion rod
B. Air conditioner
C. Automatic washing machine
D. Automatic control of traffic
List-ll
1. Open loop control system
2. Closed loop control system
3. Neither a closed loop nor an open loop system

The Newton-Raphson method formula for finding the square root of a real number R from the equation x² − R = 0 is

If cov(X, Y) = 10, var (X) = 6.25 and var(Y)  = 31.36, then ρ(X,Y) is

The fourier transform of a conjugate symmetric function is always

I ________ made arrangements had I _________informed earlier.

If Area between the curves x = 2ay² and  y = 2bx² is 1 then, find ab?

In circuit given if both Transistors have same VT what is the approximate value of highest possible output voltage vout if v_h, can range from 0 to V_DD, it is assumed that 0 < v_T < V_DD

  along the straight line from 

The value of σ_x² , σ_y² , R_XY and ρ are respectively

The statistically independent random variable X and Y have mean values .and  They have second moments    and  Consider a random variable W = 3X - Y.

Que: The mean value E [W] is

A joint sample space for two random variable X and Y has four elements (1, 1), (2, 2), (3, 3) and (4, 4). Probabilities of these elements are 0.1, 0.35, 0.05 and 0.5 respectively.

Que: The probability of the event {X ≤ 2.5, Y ≤ 6} is

The variance of random variable X is

The random variables X and Y have variances 0.2 and 0.5 respectively. Let Z= 5X-2Y. The variance of Z is?

The random variable X is defined by the density

The expected value of g(X)  = X³ is

If y = x |x|, then find Derivative of y?

“If you are looking for a history of India, or for an account of the rise and fall of the British Raj, or for the reason of the cleaving of the subcontinent into two mutually antagonistic parts and the effects this mutilation will have in the respective section, and ultimately on Asia, you will not find it in these pages; for though I have spent a lifetime in the country. I lived too near the seat of events, and was too intimately associated with the actors, to get the perspective needed for the impartial recording of these matters”.

Here, the word ‘antagonistic’ is closest in meaning to

The capacity of a memory chip is 8192 bits and it has 2048 rows. Then the organisation of the chip is

Which of the following system is affected by quadrature null effect?

With 10 V dc connected at port A in the linear nonreciprocal two-port network
shown below, the following were observed :

(i) 1Ω connected at port B draws a current of 3A
(ii) 2.5 Ω connected at port B draws a current of 2A

With 10 V dc connected at port A, the current drawn by 7 Ω connected at port B
is

A semiconductor with intrinsic carrier concentration 1 × 10¹⁰ cm^-3 at 300°K has both valence and conduction band effective densities of states N_C and N_V equal to 10¹⁹ cm^-3. The band gap E_g is _____ eV.

Which of the following parameters is used for distinguishing between a small signal and a large-signal amplifier?

A binary symmetric channel (BSC) has a transition probability of 1/8. If the
binary symbol X is such that P(X = 0) = 9/10, then the probability of error for
an optimum receiver will be