Question
Download Solution PDFThe negative feedback in an amplifier
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFNegative feedback circuit:
The feedback amplification factor is given by:
\({A_f} = \frac{A}{{1 + A\beta }}\),
where,
A is open-loop gain
Aβ is the loop gain.
The negative feedback in amplifiers causes:
- Reduced the gain and increases the stability in gain
- Increases the bandwidth to maintain constant gain-bandwidth product
- Reduces the distortion and noise in the amplifier
- The signal to noise ratio is not affected.
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