In order to prevent distortion in the output signal after amplificatio...
Higher than the positive saturation and lower than the negative saturation level of the amplifier are the desired characteristics in order to prevent distortion.
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In order to prevent distortion in the output signal after amplificatio...
Introduction:
In order to prevent distortion in the output signal after amplification, it is necessary to ensure that the input signal lies within the negative and positive saturation levels of the amplifier. This is because amplifiers have a limited dynamic range, and if the input signal exceeds these saturation levels, it will result in distortion in the output waveform.
Explanation:
To understand why the input signal must lie within the negative and positive saturation levels of the amplifier, let's delve into the concept of saturation.
What is Saturation?
Saturation is a condition that occurs when an amplifier reaches its maximum output level and can no longer increase its output voltage or current. In other words, the amplifier hits its limit and cannot amplify the signal any further.
Negative Saturation Level:
The negative saturation level is the lowest voltage level that an amplifier can output. When the input signal exceeds this level in the negative direction, the amplifier will be unable to reproduce the input waveform accurately. This will result in distortion, as the amplifier will "clip" the signal, cutting off the negative peaks and flattening the waveform.
Positive Saturation Level:
Similarly, the positive saturation level is the highest voltage level that an amplifier can output. When the input signal exceeds this level in the positive direction, the amplifier will again clip the signal, cutting off the positive peaks and distorting the waveform.
Why must the input signal lie within the saturation levels?
If the input signal is higher than the positive saturation level or lower than the negative saturation level, the amplifier will not be able to faithfully reproduce the entire waveform. As a result, the output signal will be distorted, and the original information contained in the input signal will be lost or altered.
Conclusion:
To prevent distortion in the output signal after amplification, it is crucial to ensure that the input signal lies within the negative and positive saturation levels of the amplifier. By staying within these limits, the amplifier can accurately reproduce the input waveform without introducing any significant distortion.
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