# The reflection coefficient is given by

1.  - 0.6

2.  - 1

3.  0.6

4.   0

4

0.6

Explanation :
No Explanation available for this question

# An ideal op-amp is an ideal

1.  voltage controlled current source

2.  voltage controlled voltage source

3.  current controlled current source

4.  current controlled voltage source

4

voltage controlled voltage source

Explanation :
No Explanation available for this question

# Voltage series feedback (also called series-shunt feedback) results in

1.  increase in both input and output impedances

2.  decrease in both input and output impedances

3.  increase in input impedance and decrease in output impedance

4.  decrease in input impedance and increase in output impedance

4

increase in input impedance and decrease in output impedance

Explanation :
No Explanation available for this question

# A master slave flip-flop has the characteristic that

1.  change in the input immediately reflected in the output

2.  change in the output occurs when the state of the master is affected

3.  change in the output occurs when the state of the slave is affected

4.  both the master and the slave states are affected at the same time

4

change in the output occurs when the state of the slave is affected

Explanation :
No Explanation available for this question

# The range of signed decimal numbers  that can be represented by 6-bite 1's complement number is

1.  -31 to +31

2.  -63 to +64

3.  -64 to +63

4.  -32 to +31

4

-31 to +31

Explanation :
No Explanation available for this question

1.

2.

3.

4.

4 Explanation :
No Explanation available for this question

# A digital system  is required  to amplify a binary-encoded audio signal. The user should be able to control the gain of the amplifier from a minimum to a maximum in 100 increments.The minimum number of bits required to encode, in straight binary, is

1.  8

2.  6

3.  5

4.  7

4

7

Explanation :
No Explanation available for this question

# The Fourier transform of y (2n) will be

1.  e-j2w [cos 4w + 2 cos 2w + 2]

2.  [cos 2w + 2 cos w + 2]

3.  e-jw [cos 2w + 2 cos w + 2]

4.  e-j2w [cos 2w + 2 cos w + 2]

4

e-jw [cos 2w + 2 cos w + 2]

Explanation :
No Explanation available for this question

# The impulse response h[n] of a linear time-invariant system is given by h[n] = u[n + 3] + u[n - 2] - 2u[n - 7].where u[n] is the unit step sequence. The above system is

1.  stable but not causal

2.  stable and causal

3.  causal but unstable

4.  unstable and not causal

4

stable but not causal

Explanation :
No Explanation available for this question

# The z-transfrom of a system is H (z) = z/(z - 0.2) If the ROC is | z | < 0.2, then the impulse response of the system is

1.  (0.2)n u[n]

2.  (0.2)n u[-n -1]

3.  -(0.2)n u[n]

4.  -(0.2)n u[-n -1]

4