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Why does no DC current flow in the primary winding of the output transformer of class B push-pull amplifier?
- a)Because DC currents from both transistors flow in opposite directions
- b)Because the net impedance is very high to allow flow of current
- c)The winding only allows AC current to flow
- d)Current only flows in secondary winding due to the presence of load at that side
Correct answer is option 'A'. Can you explain this answer?
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Why does no DC current flow in the primary winding of the output trans...
The net DC current in the primary winding of the output transformer is zero because DC collector currents of both transistors being used flow in opposite directions and hence transformer saturation doesn’t occur.
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Why does no DC current flow in the primary winding of the output trans...
Understanding Class B Push-Pull Amplifiers
In a Class B push-pull amplifier, two transistors are used to amplify the input signal. These transistors conduct alternately, which is crucial to the operation of the amplifier.
Why No DC Current Flows in the Primary Winding
The primary winding of the output transformer experiences a unique situation:
Conclusion
The operation of a Class B push-pull amplifier relies on the cancellation of DC currents in the primary winding due to the complementary action of its transistors. This characteristic allows the output transformer to focus on amplifying the AC component of the input signal, thus enhancing the overall efficiency and performance of the amplifier.
In a Class B push-pull amplifier, two transistors are used to amplify the input signal. These transistors conduct alternately, which is crucial to the operation of the amplifier.
Why No DC Current Flows in the Primary Winding
The primary winding of the output transformer experiences a unique situation:
- Opposing DC Currents: The two transistors in a push-pull configuration conduct in opposite phases. When one transistor is on (conducting), the other is off (non-conducting). This means that any potential DC current flowing through one transistor is countered by an equal and opposite current in the other transistor.
- Zero Net DC Current: As a result of this opposing action, the net DC current in the primary winding becomes zero. The current flowing in one direction is effectively canceled out by the current flowing in the opposite direction.
- AC Signal Amplification: The amplifier is designed to handle AC signals, where the transistors switch on and off quickly. The alternating nature of the input signal ensures that the transformer primarily deals with AC currents, allowing it to efficiently transfer energy without significant DC components.
Conclusion
The operation of a Class B push-pull amplifier relies on the cancellation of DC currents in the primary winding due to the complementary action of its transistors. This characteristic allows the output transformer to focus on amplifying the AC component of the input signal, thus enhancing the overall efficiency and performance of the amplifier.
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Why does no DC current flow in the primary winding of the output transformer of class B push-pull amplifier?a)Because DC currents from both transistors flow in opposite directionsb)Because the net impedance is very high to allow flow of currentc)The winding only allows AC current to flowd)Current only flows in secondary winding due to the presence of load at that sideCorrect answer is option 'A'. Can you explain this answer?
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Why does no DC current flow in the primary winding of the output transformer of class B push-pull amplifier?a)Because DC currents from both transistors flow in opposite directionsb)Because the net impedance is very high to allow flow of currentc)The winding only allows AC current to flowd)Current only flows in secondary winding due to the presence of load at that sideCorrect answer is option 'A'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about Why does no DC current flow in the primary winding of the output transformer of class B push-pull amplifier?a)Because DC currents from both transistors flow in opposite directionsb)Because the net impedance is very high to allow flow of currentc)The winding only allows AC current to flowd)Current only flows in secondary winding due to the presence of load at that sideCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Why does no DC current flow in the primary winding of the output transformer of class B push-pull amplifier?a)Because DC currents from both transistors flow in opposite directionsb)Because the net impedance is very high to allow flow of currentc)The winding only allows AC current to flowd)Current only flows in secondary winding due to the presence of load at that sideCorrect answer is option 'A'. Can you explain this answer?.
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