If transfer function of a system is H(z) = 6 + z-1 + z-2 then system is minimun

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Electronics and Communication Engineering ‣ Signals and Systems Comments

Question
If transfer function of a system is H(z) = 6 + z^-1 + z^-2 then system is
Options
A. minimun phase
B. maximum phase
C. mixed phase
D. none

Correct Answer

minimun phase

Explanation

H(z) = 6 + z^-1 - z^-2, solve it by considering H(z) = 0 z = 1/3, -1/2 in H(z) only numerator.

Hence z = 1/3, - 1/2 will be zero, and if zero lies inside the unit circle, system will be of minimum phase.

Signals and Systems problems

Search Results

1. The Fourier series of an odd periodic function contains
Options
A. odd harmonics only
B. even harmonics only
C. cosine harmonics only
D. sine harmonics only

2. The ROC of sequence in the Z.T. of sequence x[n] = aⁿ ? [n] is
Options
A. z > a
B. z < a
C. |z| > a
D. |z| < a

3. A first order system will never be able to give a __________ response
1. band stop
2. band pass
3. all pass
Choose the correct option
Options
A. 1, 2, 3 true
B. 1 and 3 true, 2 false
C. 1, 2 are true 3 is false
D. 1, 2 are false, 3 is true

4. In Laplace transform, multiplication by e^-at in time domain becomes
Options
A. translation by a in s domain
B. translation by (-a) in s domain
C. multiplication by e^-as in s domain
D. none of the above

7. Assertion (A): If , the initial value of i(t) is 5A
Reason (R): As per initial vaue theroem
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is true, R is false
D. A is false, R is true

9. In an ac circuit the fundamental component of current wave lags the corresponding voltage wave by 20�. The third harmonic component of current wave lags the corresponding voltage by an angle.
Options
A. less than 20�
B. more than 20�
C. equal to 20�
D. equal to or more than 20�

Comments

There are no comments.

More in Electronics and Communication Engineering: