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Electrical Engineering QUESTION #2148
Question 1
The Barkhausen criterion for sustained oscillations in an electronic oscillator requires the loop gain $A\beta$ to be:
  • Exactly zero
  • Greater than $1$ but less than $10$
  • Equal to $1$ with a phase shift of $0^\circ$ or $360^\circ$✔️
  • Infinity
Correct Answer Explanation
For sustained oscillations, $|A\beta| = 1$ and the total phase shift around the loop must be $2n\pi$ radians ($0^\circ$ or $360^\circ$).