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Joseph Chandler December 11, 2013
Introduction
The project introduces the effects of a common emitter amplifier. It is composed of a BJT
transistor and other circuit components.
Procedures
The project uses Pspice software to analyze the BJT transistor and how it effects the common-
emitter amplifier.
Solutions
Figure 1 BJT Transistor Characteristics
Joseph Chandler December 11, 2013
Figure 2. 5uA
Figure 3. 10 uA
Figure 4. 15 uA
Joseph Chandler December 11, 2013
Figure 5. 20 uA
Figure 6. 30 uA
Figure 7. 40uA
Joseph Chandler December 11, 2013
Figure 8. 50uA
Figure 9. 0-50 uA
Figure 10. BJT common emitter amplifier
Joseph Chandler December 11, 2013
Figure 11. Input swing and output swing
Figure 12. BJT common emitter amplifier
Figure 13. Gain vs Frequency
Joseph Chandler December 11, 2013
Conclusion
The Common Emitter Amplifier has a resistor in the collector circuit that allows current through and produces the voltage output of the amplifier. The resistor is chosen in accordance to the transistor's load lines. The base has a steady voltage for stability which is caused by a reduction in the varying of beta. It is a great tool for amplifying voltage and current.
