ENGI 242 Chapter 3 Lab Questions
The following problems are PSpice Computer Labs. These two assignments are to be
performed, printed, and submitted for grading.
These two assignments are to be performed, printed, and submitted for grading’
Explanation of PSpice Computer Lab Requirements for Chapter 3
Problem 92,
For the Diode, use the library component D1N4002. Use the Default Parameters.
Select Transient and enter the appropriate parameters for the General Settings.
• The Run to time should be an integer value that is 5T where T = 1/60 s and make the
Maximum step size small for smooth output.
Problem 93
Use a series circuit consisting only of a VDC source and the Diode D1N4148.
For the Diode, modify the PSpice model for the following values
.model D1N4148 D(Is=.1p N=1.836 Rs=20 Ikf=44.17m Xti=3 Eg=1.11 Cjo=2p
+
M=.3333 Vj=.5 Fc=.5 Isr=1.565n Nr=2 Bv=100 Ibv=1p Tt=10n)
Perform a DC Sweep with the following options:
Primary Sweep Voltage V1 0 1 1mv
Secondary Sweep Temperature 0 50 100
ENGI 242 Chapter 3 Lab Questions
Example of Procedure for Solution to Question 92
1.
Draw the schematic for Problem 92. For the Diode, use the library component D1N4002.
Use the Default Parameters. It should look similar to the following:
2.
3.
Place a current probe on D1 and a voltage probe across the load. Save the Circuit. Click
on PSpice New Simulation Profile
Select Transient
and enter the
appropriate
parameters for the
General Settings.
The Run to time
should be an integer
value that is 5T
where T = 1/60 s and
make the Maximum
step size small for
smooth output.
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ENGI 242 Chapter 3 Lab Questions
4.
Click OK. Run the simulation and verify that there are 5 distinct output pulses. Your
output should look similar to the following:
5.
To increase the Y-axis grids on the output, Click on Plot
Click Axis Settings and on
the Y Grid tab
Click to remove the Check
in Automatic
In Minor Intervals between
Major, Select 5
Click on OK
6.
Print the Schematic and
output waveform and submit
to your classroom instructor.
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ENGI 242 Chapter 3 Lab Questions
If you had to modify the diode model parameters, you would have to do the following:
1.
Click to select the diode.
2.
Click on Edit
3.
Click on PSpice model. You should see the following:
4.
5.
In the right window, replace the parameters that need to be changed. To change IS to 1P,
select the value of IS after the equal sign and type in the new value. You may use E
notation such as 1E-12 or prefix for units of measurement 1P.
When you are finished, close the windows (the red X in the graphic above). When it asks
for a library name, just take the default.
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