AE1_EXP_4_STUDENT_MANUAL.docx - Experiment 4 Lab Manual American International University Bangladesh Department of Electrical and Electronic Engineering

AE1_EXP_4_STUDENT_MANUAL.docx - Experiment 4 Lab Manual...

This preview shows page 1 - 2 out of 4 pages.

Experiment 4 Lab Manual American International University- Bangladesh Department of Electrical and Electronic Engineering EEE 2210: Analog Electronics1 Lab Laboratory Title: Study of feedback amplifier Circuit Introduction: In this experiment the effect of negative feedback on input-output impedance and bandwidth of voltage series feedback amplifier and current series feedback amplifier is analyzed. Here we are using a two stage amplifier for this purpose. At first frequency response curve of the amplifier without feedback is plotted experimentally. Then frequency response curves of voltage series feedback amplifier and current series feedback amplifier are plotted experimentally. Then the effect of negative feedback on the frequency response is analyzed. Theory and Methodology: When any increase in the output signal results into the input in such a way as to cause the decrease in the output signal, the amplifier is said to have negative feedback. The advantages of providing negative feedback are that the transfer gain of the amplifier with feedback can be stabilized against variations in the hybrid parameters of the transistor or the parameters of the other active devices used in the circuit. The most advantage of the negative feedback is that by proper use of this, there is significant improvement in the frequency response and in the linearity of the operation of the amplifier. The disadvantage of the negative feedback is that the voltage gain is decreased.
Image of page 1
Image of page 2

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture