R.C Coupled Amplifier
The below fig shows a two stage R.C coupled amplifier. Here the
first stage is connected to the second stage through the coupling capacitor CC
and resistor RC. Therefore, this amplifier is called as RC coupled
amplifier. The resistor R1, R2 from the self bias and RE
form stabilization network. The emitter bypass capacitor offers low reactance
path to the signal. This method of coupling is widely used in cascade amplifier
stages.
Working:
When the input voltage is applied to the base of the first
transistor through a input capacitor CIN, it appearing the amplified
form across its collector load RC. The output of the first stage is
given to the vase of the next stage through coupling capacitor CC.
The second stage does further amplification of the signal.