The class AB amplifier output is present for...

Question 1 / 27070dgiiVZE6RxDWTU19b9cv

Question 1 of 27070dgiiVZE6RxDWTU19b9cv

The class AB amplifier output is present for what portion of the input cycle?

Question 1 of 27070

The class AB amplifier output is present for what portion of the input cycle?

🔍 Key Concepts

• Class A vs Class B vs Class AB amplifier conduction angles • Relationship between degrees of conduction and portion of input signal cycle • How overlap of conduction in push-pull stages affects distortion and efficiency

💭 Think About

• First, recall how many degrees of the input cycle a Class A amplifier conducts, then how many degrees a Class B amplifier conducts. Where would a hybrid between these two logically fall? • Think about why Class AB amplifiers were developed compared to pure Class B. What conduction characteristic reduces crossover distortion? • Visualize the sine wave input over 360 degrees. For Class AB, over how much of this 360-degree cycle does at least one device conduct?

✅ Before You Answer

• Verify the conduction angle definition: it’s the part of the 360° input cycle during which the output device conducts current. • Compare choices with known values: Class A ~ 360°, Class B ~ 180°, Class C < 180°. • Confirm that Class AB is designed to have a conduction angle between Class A and Class B, not exactly equal to either.

Question 1 of 27070

The class AB amplifier output is present for what portion of the input cycle?

Exactly 180 degrees.

360 degrees

More than 180 but less than 360 degrees.

Less than 180 degrees.