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Analog ElectronicsPower Amplifiers

In an ideal class-B push-pull amplifier delivering a sinusoid, the maximum theoretical efficiency is approximately?

  • A50%
  • B66.7%
  • C78.5%
  • D100%
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Correct Answer: C. 78.5%
Explanation: For ideal class-B push-pull operation at maximum sinusoidal output, eta_max=pi/4≈0.785 or 78.5%.
Reference: Standard analog electronics: class-B efficiency
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