List of DIY Electronics Engineering Projects

RC COUPLED AMPLIFIER

rc coupled amplifier circuit
RC Coupled Amplifier Circuit Diagram


The figure shows the circuit diagram of an RC COUPLED AMPLIFIER.

RC Coupled Amplifier Working Principle:-

These are the basic principles used for RC coupled amplifier, to amplify the signal.
  •  R1 and R2 provides necessary biasing to the Transistor Q.
  • It will stabilize the Q point near the middle of DC Load line.
  •  It is called as Coupling Capacitor.
  •  It provides coupling to the input and output signals.
  • It helps to achieve maximum power transform
  •  It helps to control or drop the supply voltage Vcc.
  •  It gives a safer limit of vcc for collector and emitter terminals.
  • Emitter capacitor, it also called as Bypass capacitor.
  •  It will bypass ac current and restricts dc.
  • Due to this only dc voltage will drop across emitter resistor.
  • If we neglecting the Bypass capacitor, ac voltage will drop across.

ADVANTAGES OF RC COUPLED AMPLIFIER

  • We can be able to amplify any signal in Audio frequency range.
  •  It provides faithful amplification of input signal.
  •  Simple circuit diagram
  •  By using the transistor BC107 it provides an amplification factor of nearly 50.

DISADVANTAGES OF RC COUPLED AMPLIFIER

  • Bjt Amplifier will oscillates on higher frequency range.
  •  Band width is comparably narrow than JFET amplifier

DC BIASING CONDITIONS

  •  Voltage drop across collector resistor Rc
  •  Voltage drop across emitter resistor Re
  •  Voltage drop across Collector-Emitter terminal should be equal to 50% of Vcc.



Inorder to achieve faithful amplification of input signal, the Q point must be selected in the middle of DC Load Line.
To stabilize the Q point in the middle and make it independent of temperature variations we are using voltage divider bias.





Tittu Thomas

Author & Editor

I'm Tittu Thomas, An Electronics and Communication Engineer from India, Kerala. I love doing hobby electronics circuits, blogging, programming, etc. Started this blog while doing my B-Tech degree under CUSAT university.



1 comments so far:

  1. here in transistor :common emitter configuration is used
    so output voltage must be 180 degree phase shifted from input voltage
    But in circuit used above output voltage is in phase with input voltage

    ReplyDelete

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