Plate current flows for less than 180...

Question 1 / 270702eDSGWfJth49aVTmFEwM

Question 1 of 270702eDSGWfJth49aVTmFEwM

Plate current flows for less than 180 degrees (about 120 degrees when the grid bias is about twice cutoff value) in what class amplifier?

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Question 1 of 27070

Plate current flows for less than 180 degrees (about 120 degrees when the grid bias is about twice cutoff value) in what class amplifier?

🔍 Key Concepts

• Amplifier classes (A, B, AB, C) and how they relate to the portion of the RF cycle in which current flows • Conduction angle (in degrees) as a way of describing how long the tube conducts during one full input cycle • Effect of grid bias vs. cutoff bias on how much of the cycle plate current flows

💭 Think About

• First recall which amplifier class has plate current flowing for the entire 360 degrees of the input signal and which has about 180 degrees of conduction • Think about what happens to the conduction angle when the grid bias is made more negative, approaching or exceeding cutoff • Match the description "less than 180 degrees (about 120 degrees when the grid bias is about twice cutoff)" with the correct amplifier class known for short conduction angle and high efficiency

✅ Before You Answer

• Verify which amplifier class is typically used in RF power output stages for maximum efficiency, accepting higher distortion • Check which class is defined by conduction for less than half of the input signal cycle (<180°) • Confirm that you are not mixing up the class where conduction is exactly about 180° with the one where it is significantly less than 180°

Question 1 of 27070

Plate current flows for less than 180 degrees (about 120 degrees when the grid bias is about twice cutoff value) in what class amplifier?

Question 1 / 270702eDSGWfJth49aVTmFEwM

Question 1 of 270702eDSGWfJth49aVTmFEwM

Plate current flows for less than 180 degrees (about 120 degrees when the grid bias is about twice cutoff value) in what class amplifier?

Back

Question 1 of 27070

Plate current flows for less than 180 degrees (about 120 degrees when the grid bias is about twice cutoff value) in what class amplifier?