Basic Electronics Paper 2, Nov/Dec 2015

 

  • Question 5

    (a). State the function of feedback in an electronic circuit.

    (b). (i) Draw and label the frequency response curve of an RC coupled amplifier.

    (ii) Indicate the bandwidth in 5(b)(i).

  • Observation

          The expected answers were;

     

     

    (a). The function of feedback in electronic circuit is to control the circuit’s output.

     

    (b).


    Feedback, in electronic circuits, serves the fundamental purpose of enabling the control of the circuit’s output. The frequency response curve of an RC-coupled BJT amplifier is as drawn above. In order to indicated the bandwidth as requested in 5(b)(ii), the half-power (3dB) frequencies must first be identified. There was no correct response to this question.