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Negative feedback in amplifier _____________

Question

Negative feedback in amplifier _____________

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Solution 1

Negative feedback in an amplifier stabilizes the gain, reduces distortion, increases bandwidth, and improves input and output impedance characteristics.

Here are the steps:

  1. Stabilizes Gain: Negative feedback helps to stabilize the gain of an amplifier by reducing the effects of temperature and device parameter variations.

  2. Reduces Distortion: It reduces the non-linear distortion by making the gain of the amplifier linear over a wide range of input signal.

  3. Increases Bandwidth: Negative feedback increases the bandwidth of the amplifier by reducing the gain at lower frequencies and increasing the gain at higher frequencies.

  4. Improves Impedance: It improves the input and output impedance characteristics of the amplifier. Negative feedback increases the input impedance and decreases the output impedance, which is often desirable in amplifier design.

This problem has been solved

Solution 2

Negative feedback in an amplifier stabilizes the gain, reduces distortion, increases bandwidth, and improves input and output impedance characteristics.

Here are the steps:

  1. Stabilizes Gain: Negative feedback helps to stabilize the gain of an amplifier by making it less sensitive to variations in the parameters of the transistor.

  2. Reduces Distortion: It reduces the non-linear distortion by making the gain of the amplifier linear over a wide range of input signal.

  3. Increases Bandwidth: Negative feedback increases the bandwidth of the amplifier by reducing the gain at lower and higher frequencies.

  4. Improves Impedance: It improves the input and output impedance characteristics. Negative feedback increases the input impedance and decreases the output impedance of the amplifier. This makes the amplifier a better match to the source and load impedances.

This problem has been solved

Solution 3

Negative feedback in an amplifier stabilizes the gain, reduces distortion, and improves the frequency response.

Here's a step-by-step explanation:

  1. Stabilizes Gain: Negative feedback helps to stabilize the gain of an amplifier by making it less sensitive to variations in the parameters of the transistors or tubes and the temperature changes.

  2. Reduces Distortion: It reduces the non-linear distortion by making the gain of the amplifier linear over a wide range of input levels.

  3. Improves Frequency Response: Negative feedback also improves the bandwidth of the amplifier by making the gain of the amplifier constant over a wide range of frequencies.

In summary, negative feedback in an amplifier is used to control the gain, reduce distortion, and improve the frequency response.

This problem has been solved

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