Most of the systems need at least one phase of amplification. Hence amplifiers can be used in almost all the electronic devices. These are the devices that raise the amplitude of the i/p signal. The o/p of the power supply is controlled by the Amplifier. These can only increase the amplitude and the other parameters like frequency and shape remain constant. The main function of an amplifier is to increase the amplitude of the signal without changing the parameters like the shape of the wave or frequency. Amplifiers are one of the most frequently used circuits in electronics and achieve a variety of functions in great several electronic systems. There are numerous types of amplifiers accessible. But they can be famous by the type of signal they amplify. The different types of amplifiers can be classified by the kind of function they execute. The important characteristics of an amplifier include bandwidth, noise, skew rate, gain, stability, linearity, efficiency, output dynamic range.
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