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Analog ElectronicsOscillators

For sustained oscillation, the Barkhausen phase condition requires the total loop phase shift to be?

  • A90 degrees
  • B180 degrees only
  • C0 degrees or an integer multiple of 360 degrees
  • D45 degrees
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Correct Answer: C. 0 degrees or an integer multiple of 360 degrees
Explanation: Regenerative feedback requires a net loop phase of 0 degrees modulo 360 degrees at the oscillation frequency.
Reference: Standard analog electronics: oscillators
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