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The input signal Vin shown in the figure is a 1 KHz square wave voltage that alternates between +7V and -7V with a 50% duty cycle. Both transistors have the same current gain, which is large. The circuit delivers power to the load resistor RL. What is the efficiency of this circuit for the given input? Choose the closest answer.
  • a)
    46%
  • b)
    55%
  • c)
    63%
  • d)
    92%
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The input signal Vin shown in the figure is a 1 KHz square wave volta...
This is a class-B amplifier whose efficiency is given as
η = πVp/4VcC
Where Vp→ peak value of input signal
VCC→ Supply voltage
Here VP = 7 volt, VCC = 10 volt
So, η= π/4 × 7/10 × 100 = 54.95% ≈ 55%
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The input signal Vin shown in the figure is a 1 KHz square wave voltage that alternates between +7V and -7V with a 50% duty cycle. Both transistors have the same current gain, which is large. The circuit delivers power to the load resistor RL. What is the efficiency of this circuit for the given input? Choose the closest answer.a)46%b)55%c)63%d)92%Correct answer is option 'B'. Can you explain this answer?
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