Question
Download Solution PDFWhich of the following improvement is obtained in negative feedback amplifier?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFNegative feedback amplifier:
A negative-feedback amplifier is an electronic amplifier that subtracts a fraction of its output from its input.
The transfer function of a negative-feedback amplifier is given by:
\({V_o(s)\over V_i(s)} = {A_{ol}\over 1+\beta A_{ol}}\)
Effects of negative feedback:
- Increases input resistance
- Reduces gain
- Increases bandwidth
- Stability increases hence providing a more linear operation
- Reduces noise and distortion
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