# Electronics and Communication Engineering - Signals and Systems - Discussion

Discussion Forum : Signals and Systems - Section 1 (Q.No. 1)

1.

What about the stability of system in

Answer: Option

Explanation:

ROC include the unit circle hence it is stable.

Discussion:

49 comments Page 1 of 5.
Abdul Wahab said:
9 months ago

The System is unstable,

Since, the pole at z = 0.4 lies inside the unit circle and the other pole at z = 2 lies outside the unit circle.

For a system to be stable, all the poles must be inside the unit circle in the z-plane.

Therefore, the system is unstable.

Since, the pole at z = 0.4 lies inside the unit circle and the other pole at z = 2 lies outside the unit circle.

For a system to be stable, all the poles must be inside the unit circle in the z-plane.

Therefore, the system is unstable.

(6)

Usama said:
3 years ago

H(z) is actually z transform. Now finding the ROC:

The roots are 0.2, 2.

which makes a circle that encloses the unit circle, so the system is stable.

The roots are 0.2, 2.

which makes a circle that encloses the unit circle, so the system is stable.

(2)

Moni said:
4 years ago

Find ROC by using partial differentiating it gives two poles both are causal so the greatest pole is roc that means z>2, should lie outside the circle. It is unstable.

Salman said:
4 years ago

The ROC for the non causal signal is? Can anyone answer this?

Tushar said:
5 years ago

According to me, it is Unstable.

(1)

Mosin said:
5 years ago

What is Roc?

If we use control systems topic here.

The system is stable because all poles are lying on the right-hand side.

If we use control systems topic here.

The system is stable because all poles are lying on the right-hand side.

Moovendran said:
5 years ago

Pole is Z=2.

Meena chintha said:
5 years ago

Pole is Z=2, the unit circle is 1. So it is unstable.

Then how, it should be stable? Explain it.

Then how, it should be stable? Explain it.

Aiyoob said:
6 years ago

All poles are in the left half of s plane.

So, Use the concept of control system.

So, Use the concept of control system.

Ramasubramanian said:
6 years ago

The system is unstable since the pole z=2 lies outside the UNIT circle.

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