BJT Small Signal Analysis: Common Emitter Fixed Bias and Voltage Divider Bias

In this video, the Small Signal Analysis of the Common Emitter Fixed Bias and Voltage Divider Bias Circuit is Explained.

By watching this video, you will learn the following topics:

1:00 Why a coupling capacitors are used in the Amplifier Circuit

2:45 Steps to follow for the Small Signal Analysis

4:35 Small Signal Analysis of CE Fixed Bias Circuit

10:40 Small Signal Analysis (with output resistance)

11:44 Small Signal Analysis of CE Voltage Divider Bias Circuit


BJT Small Signal Analysis :

Small Signal Analysis is very useful when the BJT is used as an amplifier.
Using the small-signal analysis, it is possible to find or estimate the different amplifier parameters like Voltage Gain, input and output impedance.

Steps to follow for the Small Signal Analysis:

1) Consider all the DC sources in the circuit as Zero
2) Replace the coupling and bypass capacitor by the short circuit
3) Replace the BJT with the Small-Signal model

In this video, the small-signal Analysis of Common Emitter Fixed Bias and the Voltage Divider Bias is carried out and the expression of the different amplifier parameters like Voltage Gain, input impedance and the output impedance is found.

The link for the other useful videos related to BJT (Playlist)
   • Introduction to Bipolar Junction Tran...  

This video will helpful to all the students of science and engineering in understanding how to do the small-signal analysis of the BJT circuit.

#BJTSmallSignalAnalysis
#BJT
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