Amplifier - Types, Parameters, and Applications

Running Head: AMPLIFIER
Amplifier
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AMPLIFIER
Introduction
An amplifier is an electronic device that is used in increasing the signal power which is the
time-varying current or voltage. In doing so, the amplitude of the signal’s waveform
increases without a change in other waveform parameters such as wave-shape and frequency.
Amplifiers are the widely and commonly applied circuits in performing various functions in
electronics and electronic systems. The symbol used to generally display an amplifier is
shown below. This symbol provides no detail of the described amplifier type, but the signal
flow is assumed to be directed from left going right of the diagram (Gerhard, 2018).
Types of amplifiers
A way of describing an amplifier is by the kind of the signal amplification is performed.
These types of signal amplification are numerous hence some of the amplifiers include;
A.F Amplifiers
Audio frequency amplifiers are applied in signal amplification to an approximate range of
20Hz- 20kHz that people can hear. Some audio Hi-Fi amplifiers exceed an average range of
100kHz while a number of audio amplifiers may limit the high frequency to about 15kHz or
lower (Mladen & Saurabh, 2017).
R.F Amplifiers
These are tuned amplifiers whereby the operational frequency is regulated using a tuned
circuit. Depending on the function of the amplifier, the circuit may be non-adjustable or
adjustable.