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Assertion (A): The emitter follower inherently exhibits 100% negative feedback.
Reason (R): The emitter follower is an example of voltage-series feedback.
Reason (R): The emitter follower is an example of voltage-series feedback.
- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
Correct answer is option 'B'. Can you explain this answer?
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Assertion (A): The emitter follower inherently exhibits 100% negative ...
The emitter follower inherently exhibits 100% negative feedback because the voltage at the emitter follows the input voltage. Reason is also a correct statement since the emitter follower simultaneously increases input resistance and decreases output resistance. Hence, both assertion and reason are correct but reason is not the correct explanation of assertion.
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Assertion (A): The emitter follower inherently exhibits 100% negative ...
Assertion (A): The emitter follower inherently exhibits 100% negative feedback.
Reason (R): The emitter follower is an example of voltage-series feedback.
Explanation:
Emitter Follower:
The emitter follower is a common transistor configuration where the emitter terminal of the transistor is directly connected to the output. It is also known as a common collector amplifier because the collector terminal is common to both input and output. The input is applied to the base terminal and the output is taken from the emitter terminal.
Negative Feedback:
Negative feedback is a technique used in electronic systems to stabilize and improve the performance of the system. It involves feeding back a portion of the output signal to the input with a phase that opposes the input signal. This helps in reducing distortion, improving linearity, increasing bandwidth, and reducing sensitivity to component variations.
Assertion (A): The emitter follower inherently exhibits 100% negative feedback.
The emitter follower configuration inherently exhibits negative feedback. When the input signal is applied to the base terminal, the output is taken from the emitter terminal. As the output voltage increases, it is fed back to the base terminal through the emitter resistor. This feedback voltage opposes the input voltage, resulting in negative feedback. The negative feedback helps in stabilizing the gain, reducing distortion, and increasing the input and output impedance.
Reason (R): The emitter follower is an example of voltage-series feedback.
The emitter follower can be considered as an example of voltage-series feedback. In voltage-series feedback, the feedback voltage is taken in series with the input voltage. In the emitter follower configuration, the feedback voltage (emitter voltage) is in series with the input voltage (base-emitter voltage). This feedback voltage is proportional to the output voltage and opposes the input voltage, resulting in negative feedback.
Conclusion:
Both the assertion and the reason are true. The emitter follower inherently exhibits 100% negative feedback, and it can be considered as an example of voltage-series feedback. Therefore, option 'B' is the correct answer.
Reason (R): The emitter follower is an example of voltage-series feedback.
Explanation:
Emitter Follower:
The emitter follower is a common transistor configuration where the emitter terminal of the transistor is directly connected to the output. It is also known as a common collector amplifier because the collector terminal is common to both input and output. The input is applied to the base terminal and the output is taken from the emitter terminal.
Negative Feedback:
Negative feedback is a technique used in electronic systems to stabilize and improve the performance of the system. It involves feeding back a portion of the output signal to the input with a phase that opposes the input signal. This helps in reducing distortion, improving linearity, increasing bandwidth, and reducing sensitivity to component variations.
Assertion (A): The emitter follower inherently exhibits 100% negative feedback.
The emitter follower configuration inherently exhibits negative feedback. When the input signal is applied to the base terminal, the output is taken from the emitter terminal. As the output voltage increases, it is fed back to the base terminal through the emitter resistor. This feedback voltage opposes the input voltage, resulting in negative feedback. The negative feedback helps in stabilizing the gain, reducing distortion, and increasing the input and output impedance.
Reason (R): The emitter follower is an example of voltage-series feedback.
The emitter follower can be considered as an example of voltage-series feedback. In voltage-series feedback, the feedback voltage is taken in series with the input voltage. In the emitter follower configuration, the feedback voltage (emitter voltage) is in series with the input voltage (base-emitter voltage). This feedback voltage is proportional to the output voltage and opposes the input voltage, resulting in negative feedback.
Conclusion:
Both the assertion and the reason are true. The emitter follower inherently exhibits 100% negative feedback, and it can be considered as an example of voltage-series feedback. Therefore, option 'B' is the correct answer.
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Assertion (A): The emitter follower inherently exhibits 100% negative feedback.Reason (R): The emitter follower is an example of voltage-series feedback.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'B'. Can you explain this answer?
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