Question: What are the advantages of negative feedback.

Subject: Electronic Devices and Circuits II

Topic: Feedback Amplifiers

Difficulty: Low

edc2(34) • 865 views
modified 10 months ago  • written 12 months ago by gravatar for Amruta Padhye Amruta Padhye20

When some part of output signal is again fed back to input then that signal is called as feedback signal.If the feedback signal and input signal are in phase means they have same polarities the feedback is said to be positive. If the feedback and input signal are out of phase then the feedback is said to be negative. The figure below shows basic block diagram of negative feedback.

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Negative feedback has following advantages:

• The negative feedback reduces noise

• It has less frequency distortion means improved frequency response

• Better stabilized voltage gain

• It has less harmonic distortion.

• It has less amplitude distortion.

• It has less phase distortion.

• Input and output impedances can be modified as desired.

• It can increase or decrease output impedances.

• It has higher fidelity i.e. more linear operation

written 10 months ago by gravatar for Amruta Padhye Amruta Padhye20
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