Define bandwidth of an amplifier:
An amplifier is a device used to convert a low voltage signal into a high voltage signal from a source device. In other words, it used to gain power.
The Bandwidth (BW) of an amplifier is defined as the difference between the frequency limits of the amplifier.
The range of frequencies within a band is known as bandwidth.An amplifier also known as an amp is an electronic device that enhances the power of a signal.
It uses electric power to increase the amplitude of a signal at the initial input to produce a gradually enhanced amplitude signal at output.
The width of frequencies or the band of frequencies that an amplifier can amplify most effectively is represented using a bandwidth.
An amplifier has frequencies which can be amplified, these frequencies have a lower limit (that could even be zero) and an upper limit but the amplitude enhancement cannot be done for all these frequencies effectively.
So if an amplifier is designed to amplify the frequencies between a lower frequency f1 and a higher frequency f2 the bandwidth will be the difference of these two frequencies. So the difference of f2 and f1 will be the bandwidth of the amplifier.
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