EDC Expt 6 | Voltage Series feedback Amplifier using CE Conf.| SE ETC |Electronic Devices & Circuits

AIM: (a) To verify input-output waveforms of voltage series feedback amplifier.
(b) To obtain its mid band gain and bandwidth.

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. This disadvantage of the negative feedback is that the voltage gain is decreased. In Voltage-Series feedback, the input impedance of the amplifier is decreased and the output impedance is increased. Noise and distortions are reduced considerably. In voltage series feedback amplifier, sampling is voltage and series mixing indicates voltage mixing. As
both input and output are voltage signals and is said to be voltage amplifier with gain Avf.

The effect of negative feedback (Voltage -Series Feedback) on the amplifier is observed. The voltage gain and frequency response of the amplifier are obtained. Also gain bandwidth product of the amplifier is calculated. (Include Quantitative Analysis)


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