this is the prelab of exp 5 on diode limiters, clippers and clampers.you only do the prelab report!everything is uploaded.
lab5_diode_limiters_clippers_and_clampers_sp19.pdf
enee_3720l_prelab_guidelines.pdf
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ELECTRICAL ENGINEERING DEPARTMENT
ENEE 3720L – Analog Electronics Laboratory
Laboratory #5 – Diode Limiters (Clippers) and Clampers
Objective:
The purpose of this experiment is to study the characteristic of nonlinear circuit applications of
diodes; which eliminate a part of waveform that lies above or below some reference level,
Limiters (or Clippers) and which allows input waveform to be shifted from existing maximum to
a new maximum, Clampers. Analysis will consist of implementing the circuits in the laboratory
and taking measurements.
Equipment:
• Diodes: 1N4001, 1N4148
• Assorted Resistors
• Functional Generator
•
•
•
DC Power Supply
Digital Multimeter
Oscilloscope
Procedure:
Part A: Parallel Clippers Characteristics
Figure 1: Parallel-Biased Clipper
1) Construct the circuit in Figure 1 with the VDC set at 1.5 V for R of 2.2 kΩ. Measure and
record R with associated tolerance. Use 1N4001 diode.
2) Set the oscilloscope in DC mode.
3) Connect the input of the circuit to the function generator and to channel 1 of the
oscilloscope. Connect output to channel 2 of the oscilloscope.
4) Copy or take a snap-shot of the input and output voltages superimposed on each
other from the oscilloscope. Make sure the zero axes of the waveforms are aligned
together, and centered on the screen.
5) Reverse the power supply polarity of the circuit.
Lab #5 – Diode Clippers and Clampers
Page 1 of 4
ELECTRICAL ENGINEERING DEPARTMENT
ENEE 3720L – Analog Electronics Laboratory
Laboratory #5 – Diode Limiters (Clippers) and Clampers
6) Copy or take a snap-shot of the input and output voltages superimposed on each
other from the oscilloscope.
7) How do the waveforms results differ in steps 4 and 6? What is the function of the
power supply in the circuit?
Part B: Series Clippers Characteristics
Figure 2: Series-Biased Clippers
1) Construct the circuit in Figure 2 with the VDC set at 1.5 V and R of 2.2kΩ. Measure and
record the resistors with associated tolerances. Use 1N4001 diode.
2) Set the oscilloscope in DC mode.
3) Connect the input of the circuit to the function generator and channel 1 of the
oscilloscope. Connect the output to the channel 2 of the oscilloscope.
4) Copy or take a snap-shot of the input and output voltages superimposed on each
other from the oscilloscope. Make sure the zero axes of the waveforms are aligned
together and centered on the screen.
5) Reverse the power supply polarity of the circuit.
6) Copy or take a snap-shot of the input and output voltages superimposed on each
other from the oscilloscope. Make sure the zero axes of the waveforms are aligned
together and centered on the screen.
Lab #5 – Diode Clippers and Clampers
Page 2 of 4
ELECTRICAL ENGINEERING DEPARTMENT
ENEE 3720L – Analog Electronics Laboratory
Laboratory #5 – Diode Limiters (Clippers) and Clampers
7) How do the waveforms differ in steps 4 and 6? What is the function of the power
supply in the circuit?
8) How does the series-biased clipper differ from the parallel-biased clipper based on
the results you have observed?
Part C: Clampers Characteristics
Figure 3: Clamper
1) Construct the circuit in Figure 3. Where C is 1µF and R is 1MΩ. Measure and record
the resistors with associated tolerances. Use 1N4148 diode.
2) Measure and record the value of the resistor. Construct the circuit in Fig. 3.3. The
input signal is a 10 V p-p sine wave at frequency of 50 Hz.
3) Set the oscilloscope in DC mode.
4) Connect the function generator to the input and to channel 1 of the oscilloscope.
Connect the output to channel 2 of the oscilloscope.
5) Copy or take a snap-shot of the input and output voltages superimposed on each
other from the oscilloscope.
6) Measure and record the DC level of the output voltage using the DMM.
7) What is the peak-to-peak value of the output signal? Is that what you expect? Why?
8) Replace the resistor with a 10 kΩ.
Lab #5 – Diode Clippers and Clampers
Page 3 of 4
ELECTRICAL ENGINEERING DEPARTMENT
ENEE 3720L – Analog Electronics Laboratory
Laboratory #5 – Diode Limiters (Clippers) and Clampers
9) Copy or take a snap-shot of the input and output voltages superimposed on each
other from the oscilloscope. Make sure the zero axes of the waveforms are aligned
together and make sure they are centered on the screen.
10) Measure and record the DC level of the output voltage.
11) Explain why the output voltage from Step 9 is different from what was obtained in
Step 5?
12) What is the major effect of replacing the 1 MΩ resistor with the 10 kΩ resistor?
13) With R at 1 MΩ, add VDC set at 1.5 V in series with both diode and resistor in parallel.
14) Copy or take a snap-shot of the input and output voltages superimposed on each
other from the oscilloscope. Explain your waveform.
15) Measure and record the DC level of the output voltage. How is this different from Step
7 above? Discuss the application.
Lab #5 – Diode Clippers and Clampers
Page 4 of 4
ELECTRICAL ENGINEERING DEPARTMENT
PRE-LABORATORY (PRELAB) REPORTS
ENEE 3720L – ANALOG ELECTRONICS LABORATORY
PRE-LABORATORY REPORT
Each student is required to write a brief preparatory laboratory report (prelab) on each
experiment and submit it to the instructor prior to the beginning of the lab. The Preliminary
Report should provide you enough insight on how to perform and what to expect from the
experiment.
The Preliminary Report should contain the following information as applicable:
1. A cover page consisting of title, experiment, names of partner(s), course number and
section number.
2. Essential circuit diagrams (properly labeled and with all locations for pertinent
measurements clearly indicated) to be used. Any special safety precautions and/or
comments should be noted.
3. Preliminary calculations, simulations and pertinent information that may be necessary for
the completion of the experiment.
4. Explanation of anticipated results that may be theoretically obtained before any
experimental work is performed. There also should be a discussion of the meaning of the
predicted results along with their implications and possible sources of error that may be
encountered.
5. Answers to questions asked in the lab procedures that could be answered prior to the
experiment.
In addition, the student may wish to include for his own future certain theoretical material which
he has developed and /or copied from references. The source of the reference material used
should be given.
A well-prepared Preliminary Report will allow the student team to proceed with the laboratory
work without delay and with little, if any assistance from the laboratory instructor.
…
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