Contents
Current Series negative feedback CE Amplifier-Simulation
Title of the experiment:
Common emitter amplifier (Implementation of Current Series negative feedback)
AIM:
To simulate Common emitter amplifier (Implementation of Current Series negative feedback)
Material required to do the experiment:
| Sl.No. | Facilities/material required | Quantity |
| 1 | MULTISIM Software Loaded PC | 1 |
| 2 | Printer | 1 |
Procedure:
| Steps | Description (in full) |
| 1 | Theory |
| 2 | Symbol |
| 3 | Design Circuit |
| 4 | Simulation Procedure |
| 5 | Output Waveform |
THEORY:
The common emitter amplifier is a three basic single-stage bipolar junction transistor and is used as a voltage amplifier. The input of this amplifier is taken from the base terminal, the output is collected from the collector terminal and the emitter terminal is common for both the terminals.
ZENER DIODE SYMBOL:
DESIGN CIRCUIT:
Simulation Procedure:
- Open MULTISIM Software.
- Click=> New => Design1
- Click save as in Desk Top rename the Design1 to your circuit name.
- Go to Component tool bar and select the components.
- Draw the above circuits using the components that are available in the tool bar and then save the circuit.
- Double click DC_POWER its value above mentioned.
- Click simulate button or press F5 key => RUN
- Then double click connected in the output of the volt meter and measure input and output voltages.
- Then Change input voltage, again measure and print the output voltages.
RESULT:
Thus the circuit is designed to simulate the VI characteristics Forward and Reverse Bias of Zener diode and the output graph is printed.
Questions with answers:
1. What is transistor and why it is called like that?
Because it transfers the input signal from low resistance to high resistance.
2. Define α, β, γ, what is the relation between them?
These are current gains in CB,CE,CC configurations respectively, ; αγ
3. Draw the symbolic representations of NPN and PNP transistors.
4. What are the applications of transistor amplifiers?
1. It ac as a amplifier.
2. Act as a electronic switch
Video Tutorial:
All experiments should be designed and verified through simulation tools like Multisim.
1. Zener diode (Forward and Reverse bias characteristics)
2. Rectifier circuits ( Half wave, Full wave, Bridge rectifier with filters)
3. Power supply with Zener diode as Regulator
4. Common Base transistor output characteristics
5. Common emitter amplifier (Implementation of Current Series negative feedback)
6. Emitter follower (Implementation of Voltage Series negative feedback)
7. RC Coupled amplifier (Implementation of the concept of multistage amplifier)
8. Clippers and Clampers
9. RC Phase shift oscillator (Medium frequency Sine wave generators)
10. Hartley oscillator (High frequency Sine wave generator)
11. Astable Multivibrator (Square or Rectangular wave generator)
12. Gate triggering of SCR with various gate currents.
