Advanced Applications of Diodes-Basic Electronics-Lab Assignment, Exercises of Electronics

The course gives the students a sound knowledge of Fourier transforms along with Fourier integrals, partial differential equations, advanced vector analysis, complex variables and complex integrals. This lab includes: Advanced, Application, Diode, Resources, Limiter, Circuits, Simulation, Zener, Diagram, Sweep, Analysis

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2011/2012

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School of Electrical Engineering and Computer Science
EE 216 ELECTRONICS โ€“ I Fall 2011
LABORATORY EXERCISE -5
Applications of Diode
Applications of DiodeApplications of Diode
Applications of Diode
-
--
-
Part II
Part IIPart II
Part II
Objective: To Study advanced applications of Diodes
1. The primary purpose of this lab is to develop additional practical knowledge of
diodes. Diodes can be used in specialized circuits which include voltage limiters,
level shifter or clampers, voltage multipliers especially voltage doubler or tripler
circuits. In the previous lab, we looked at some applications of diode, now we will
look at some more applications which would show the versatility of this simple two
terminal device.
Required Resources
2. The following components, test equipment and software would be required.
a) PN Diode
b) Oscilloscope
c) Function Generator
d) Resistors
e) Capacitors
f) Power Supply
g) PSpice Simulation Software.
The Experiment
3. The experiment is broken down in three exercises; each experiment is divided into
two parts namely: implementation and simulation. You are required to observe and
record the simulation/implementation results and answer the given questions.
Include your answers in your lab reports.
Exercise 1: Limiter Circuits (Part A โ€“ Simulation I)
4. In the previous lab exercise you worked with some limiter circuits. In this lab, we will
take the basic limiter circuit and modify come up with modified Vo vs. Vin curve. The
second limiter circuit will be using Zener diodes.
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EE 216 ELECTRONICS โ€“ I Fall 2011

LABORATORY EXERCISE -

Applications of DiodeApplications of DiodeApplications of DiodeApplications of Diode --- Part II- Part IIPart IIPart II

Objective: To Study advanced applications of Diodes

  1. The primary purpose of this lab is to develop additional practical knowledge of diodes. Diodes can be used in specialized circuits which include voltage limiters, level shifter or clampers, voltage multipliers especially voltage doubler or tripler circuits. In the previous lab, we looked at some applications of diode, now we will look at some more applications which would show the versatility of this simple two terminal device.

Required Resources

  1. The following components, test equipment and software would be required. a) PN Diode b) Oscilloscope c) Function Generator d) Resistors e) Capacitors f) Power Supply g) PSpice Simulation Software.

The Experiment

  1. The experiment is broken down in three exercises; each experiment is divided into two parts namely: implementation and simulation. You are required to observe and record the simulation/implementation results and answer the given questions. Include your answers in your lab reports.

Exercise 1: Limiter Circuits (Part A โ€“ Simulation I)

  1. In the previous lab exercise you worked with some limiter circuits. In this lab, we will take the basic limiter circuit and modify come up with modified Vo vs. Vin curve. The second limiter circuit will be using Zener diodes.

Procedure a) Using ORCAD PSpice software, draw the circuit diagram as shown in figure 1A. b) Generate an appropriate the simulation profile and obtain the graphs showing time domain variation of Vo and Vin on the same chart. Kindly make sure that the recorded graphs are clear and readable. c) In addition to the above graphs, get a plot of Vo vs. Vin ; make use of axis variables and traces, do not use Sweep analysis, since weโ€™re only interested in observing the behavior of Vo as input sine wave varies in time from -10V to 10V. d) Once the graphs are obtained after simulating the above circuit with the appropriate simulation profile, answer the questions given at the end of this part.

Figure 1A โ€“ Circuit Diagram for Limiter Circuit - I

Observations/Measurements and Explanation:

  1. Accomplish the following and explain your results: a) Generate the Vovs Vin curve by selecting a suitable DC sweep analysis simulation profile setting. Include this plot your report. Is this plot different from the one obtained in paragraph 4 (c) above? Explain any differences that you observe. b) Attach the screen-shot of your simulation profiles and explain the reasons for the chosen settings.

e) Can you generate the Vo vs. Vin response on the oscilloscope? Explain the procedure to that you will use and generate the required response on the oscilloscope and record the result.

Observations/Measurements

  1. Answer the following questions and include them in your report. Support your answers by mathematical equations where necessary. a) Using 1N4002 diodes design a circuit that would generate a Vovs Vin response similar to the one that was obtained using circuit given in figure-1B. b) Draw the circuit and prove by using relevant equations that your designed circuit has the required response. Draw a manual plot of Vovs Vin of the designed circuit. c) Explain logically which circuit is better and more appropriate for practical use.

Exercise 2 Part A: Clamping Circuits (Simulation I)

  1. This exercise is to experiment with another application of diode, which is known as clamping. The clamping circuit is used to shift the average level of an input signal. This part of the exercise is simulation on OrCad Capture Lite. Follow the steps given below: a) Draw the circuit as shown in figure 2A. b) You have to simulate the circuit by creating your own simulation profile ( Hint: use transient analysis). Make sure the graph obtained is properly drawn. c) Simulate the circuit and record the curves obtained.

Figure 2A โ€“ Circuit Diagram for Clamper Circuit I

Observations/Measurements and Explanations

  1. Answer the following questions:

a) Record both Vin and Vout curves with respect to time, on the same graph

sheet. Explain the working of the circuit with calculations.

b) Will the capacitor discharge during the positive or negative cycles of the

input? Explain.

Exercise 2: Clamping Circuits (Part B โ€“ Simulation II)

  1. In this part we will observe modified clamper circuit as given in figure 2B. Draw this circuit in PSpice and make a suitable simulation profile setting. Simulate the circuit and answer the following question: a. Plotand record both Vin and Vo w.r.t time on the same graph and explain the working of the circuit. b. What differences do you observe as compared to circuit in figure 2A? Why do you think these differences occur? c. Now change the value of PW to 1ms. Observe the waveform, what differences do you see? Explain with relevant calculations and equations.

Figure 2B โ€“ Circuit Diagram for Clamper Circuit II

Lab Report:

Each student group has to submit detailed lab report with proper outputs and

results obtained by performing experiment. The format of the report should be as

explained by the course instructor. Your lab report is due before the next lab.