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Voltage series feedback (also called series-shunt feedback) results in
- a)increase in both input and output impedances
- b)decrease in both input and output impedances
- c)increase in input impedance and decrease in output impedance
- d)decrease in input impedance and increase in output impedance
Correct answer is option 'C'. Can you explain this answer?
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Voltage series feedback (also called series-shunt feedback) results i...
In voltage series feed back amplifier, input impedance increases by factor (1+Aβ) and output impedance decreases by the factor (1 + Aβ)
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Voltage series feedback (also called series-shunt feedback) results i...
Voltage series feedback, also known as series-shunt feedback, refers to a feedback configuration in which the feedback signal is taken from the output of the amplifier and fed back to the input in series with the input signal. In this configuration, the feedback signal is applied in series with the input signal and in parallel with the input impedance of the amplifier.
When voltage series feedback is applied to an amplifier, it has the following effects:
1. Increased Input Impedance: The feedback signal is applied in series with the input signal, which effectively reduces the voltage across the input terminals of the amplifier. This results in an increase in the input impedance of the amplifier. The input impedance is given by the ratio of the input voltage to the input current, and since the input voltage is reduced due to feedback, the input impedance increases.
2. Decreased Output Impedance: The feedback signal is applied in parallel with the input impedance of the amplifier. This effectively reduces the voltage across the input impedance, resulting in a decrease in the output impedance of the amplifier. The output impedance is the impedance seen by the load connected to the amplifier, and since the voltage across the load is reduced due to feedback, the output impedance decreases.
3. Increased Voltage Gain: The voltage series feedback configuration also increases the voltage gain of the amplifier. This is because the feedback signal is in phase with the input signal and is added to it. As a result, the overall voltage gain of the amplifier is increased.
4. Improved Linearity: Voltage series feedback improves the linearity of the amplifier. This is because the feedback signal reduces the distortion and non-linearities in the output signal, resulting in a more linear output.
Overall, voltage series feedback provides several advantages in terms of increased input impedance, decreased output impedance, increased voltage gain, and improved linearity. These characteristics make it a useful technique in amplifier design and can help to overcome certain limitations of the amplifier circuit.
When voltage series feedback is applied to an amplifier, it has the following effects:
1. Increased Input Impedance: The feedback signal is applied in series with the input signal, which effectively reduces the voltage across the input terminals of the amplifier. This results in an increase in the input impedance of the amplifier. The input impedance is given by the ratio of the input voltage to the input current, and since the input voltage is reduced due to feedback, the input impedance increases.
2. Decreased Output Impedance: The feedback signal is applied in parallel with the input impedance of the amplifier. This effectively reduces the voltage across the input impedance, resulting in a decrease in the output impedance of the amplifier. The output impedance is the impedance seen by the load connected to the amplifier, and since the voltage across the load is reduced due to feedback, the output impedance decreases.
3. Increased Voltage Gain: The voltage series feedback configuration also increases the voltage gain of the amplifier. This is because the feedback signal is in phase with the input signal and is added to it. As a result, the overall voltage gain of the amplifier is increased.
4. Improved Linearity: Voltage series feedback improves the linearity of the amplifier. This is because the feedback signal reduces the distortion and non-linearities in the output signal, resulting in a more linear output.
Overall, voltage series feedback provides several advantages in terms of increased input impedance, decreased output impedance, increased voltage gain, and improved linearity. These characteristics make it a useful technique in amplifier design and can help to overcome certain limitations of the amplifier circuit.
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Voltage series feedback (also called series-shunt feedback) results ina)increase in both input and output impedancesb)decrease in both input and output impedancesc)increase in input impedance and decrease in output impedanced)decrease in input impedance and increase in output impedanceCorrect answer is option 'C'. Can you explain this answer?
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Voltage series feedback (also called series-shunt feedback) results ina)increase in both input and output impedancesb)decrease in both input and output impedancesc)increase in input impedance and decrease in output impedanced)decrease in input impedance and increase in output impedanceCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Voltage series feedback (also called series-shunt feedback) results ina)increase in both input and output impedancesb)decrease in both input and output impedancesc)increase in input impedance and decrease in output impedanced)decrease in input impedance and increase in output impedanceCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Voltage series feedback (also called series-shunt feedback) results ina)increase in both input and output impedancesb)decrease in both input and output impedancesc)increase in input impedance and decrease in output impedanced)decrease in input impedance and increase in output impedanceCorrect answer is option 'C'. Can you explain this answer?.
Voltage series feedback (also called series-shunt feedback) results ina)increase in both input and output impedancesb)decrease in both input and output impedancesc)increase in input impedance and decrease in output impedanced)decrease in input impedance and increase in output impedanceCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Voltage series feedback (also called series-shunt feedback) results ina)increase in both input and output impedancesb)decrease in both input and output impedancesc)increase in input impedance and decrease in output impedanced)decrease in input impedance and increase in output impedanceCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Voltage series feedback (also called series-shunt feedback) results ina)increase in both input and output impedancesb)decrease in both input and output impedancesc)increase in input impedance and decrease in output impedanced)decrease in input impedance and increase in output impedanceCorrect answer is option 'C'. Can you explain this answer?.
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