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Pregunta 359

For what portion of the signal cycle does each active element in a push-pull, Class AB amplifier conduct?

  1. More than 180 degrees but less than 360 degreesRespuesta correcta
  2. Exactly 180 degrees
  3. The entire cycle
  4. Less than 180 degrees

Explicación

Class AB is biased between Class A and Class B, so each device conducts for more than half of the cycle but shuts off before the cycle ends. In a push-pull pair the two devices overlap slightly near the zero crossing, which is what removes the crossover distortion of pure Class B.

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Pregunta 359: For what portion of the signal cycle does each active… · FCC Amateur Extra Class (Element 4) · Questena