Which of the Following is Required for Oscillation?

By Mohit Uniyal|Updated : July 4th, 2022

hich of the following is required for oscillation?

  1. |A|≥1
  2. The phase shift around the feedback network must be 00.
  3. Both |A|≥1 and the phase shift around the feedback network must be 00.
  4. None of the above

Answer – C. Both Aβ>1 and the phase shift around the feedback network must be 00.

The answer to the question, which of the following is required for oscillation is Both Aβ >1 and the phase shift around the feedback network must be 00.

Solution:

To determine the oscillation in the linear electronic circuit, we need to satisfy one criterion which is known as the Barkhausen stability criterion which is applied to linear circuits with a feedback loop. |Aβ| ≥ 1 and phase shift around the loop is zero or multiple integers of 2π.

Barkhausen's criterion is a necessary condition for oscillation but not a sufficient condition: some circuits satisfy the criterion but do not oscillate.

Therefore, the required conditions for oscillation are Both |Aβ| ≥ 1, and the phase shift around the feedback network must be 00. Hence, Option (C) is the correct answer.

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