What should the plate current do in the...

Question 1 / 27070BUmVBnNMdm0ABSmk67uH

Question 1 of 27070BUmVBnNMdm0ABSmk67uH

What should the plate current do in the operation of a Class B audio amplifier?

Back

Question 1 of 27070

Q

What should the plate current do in the operation of a Class B audio amplifier?

🔍 Key Concepts

• Class B amplifier biasing and how the tube/transistor conducts over the signal cycle • Difference between plate (collector) current in Class A vs. Class B operation • Conduction angle (how many degrees of the waveform each device conducts) in Class B audio amplifiers

💭 Think About

• Think about whether the active device in a Class B amplifier conducts for the whole signal cycle or only part of it. How does that affect current flow? • Compare what happens to plate current when there is no input signal versus when a large audio signal is applied. • In an efficient audio power stage, should the DC current drawn at idle be high or low? What does that imply about how the plate current behaves with signal?

✅ Before You Answer

• Verify how Class B differs from Class A in terms of idle (no-signal) plate current. • Check whether plate current in Class B exists over the entire cycle or only the signal peaks. • Confirm which option best matches a plate current that responds to the audio signal waveform rather than staying at a fixed value.

Question 1 of 27070

Q

What should the plate current do in the operation of a Class B audio amplifier?

A

Fluctuate

B

Remain Steady

C

Increase

D

None of the above

Question 1 / 27070BUmVBnNMdm0ABSmk67uH

Question 1 of 27070BUmVBnNMdm0ABSmk67uH

What should the plate current do in the operation of a Class B audio amplifier?

Back

Question 1 of 27070

Q

What should the plate current do in the operation of a Class B audio amplifier?

🔍 Key Concepts

• Class B amplifier biasing and how the tube/transistor conducts over the signal cycle • Difference between plate (collector) current in Class A vs. Class B operation • Conduction angle (how many degrees of the waveform each device conducts) in Class B audio amplifiers

💭 Think About

• Think about whether the active device in a Class B amplifier conducts for the whole signal cycle or only part of it. How does that affect current flow? • Compare what happens to plate current when there is no input signal versus when a large audio signal is applied. • In an efficient audio power stage, should the DC current drawn at idle be high or low? What does that imply about how the plate current behaves with signal?

✅ Before You Answer

• Verify how Class B differs from Class A in terms of idle (no-signal) plate current. • Check whether plate current in Class B exists over the entire cycle or only the signal peaks. • Confirm which option best matches a plate current that responds to the audio signal waveform rather than staying at a fixed value.