Exercise: Exam Question Papers
Questions for: Exam Question Papers
For the given phase lead network, the maximum possible phase lead is
A:
sin-1
B:
30°
C:
45°
D:
60°
Answer: B
The maximum phase lead is given by,
sin φm =
Where 
Hence sin φm =
Hence φm = 30°.
Consider the circuit shown below of 2 : 1 MUX is given by the function g = ac + bc
Then f is
Then f is
A:
X 
X
XB:
XY + E X Y
C:
XE + XY
D:
None of these
Answer: B
g = ac + bc
min c = 0, g = b and c = 1, g = a
So f = y + ya ⇒ y x + yg ...(i)
g = x b + x.a = x E + X.o ⇒ x E
from (i) f = y x + y x E.
An electrical system and its signal-flow graph representation are shown in figure (a) and (b) respectively
The values of G2 and H, respectively are
The values of G2 and H, respectively are
A: 
B: 
C: 
D: 
Answer: A
Vi(s) = Z1I1 + Z3(I1 - I2) ...(i)
V0(s) = Z4I2
I2(Z3 + Z2 + Z4) = Z3I1 ...(ii)
From signal flow graph
I2 = I1G2 ⇒ 
Hence, 
...(iii)
From SFG ...(iv)
From (ii), (iii), (iv) we get H.
The logic function f(A B, C) = Σm(0, 2, 4, 5, 6) represented by
Answer: B
Consider the signal S(t) shown below :
The slope of the matched filter output during the interval
The slope of the matched filter output during the interval
Answer: A
Match filter will be
The output of this will be convolution of S(t) with match filter.
.
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