Amplifier Circuits: Types, Characteristics and Applications

Amplifier Circuits

 It is an electronic device
 It is used to increase an amplitude of the
input signal
 It is a two-port network that provides a
high amplitude signal
 There are many applications of an
amplifier such as the audio amplifier,
video amplifier, and increase an amplitude
of an input signal(Karris, 2008).
Amplifiers

 Based on manufacturing amplifiers can be
classified into three categories such as-
 BJT amplifier
 FET amplifier
 OP-AMP amplifier
Types of Amplifiers

 It is a bipolar junction transistor
 It uses both types of charge
carrier such as electron, and
hole
 It can be used as a switch and
amplifier
 There are three terminals in BJT
emitter, base, and collector
 Mode of operation-
 Active region (used as an
amplifier)
 Cut off region (used as a switch)
 Saturation region (used as a
switch)
BJT Amplifier Fig.- BJT Amplifier
(Source: Electric
Engineering, 2014)