California University of Pennsylvania
Department of Applied Engineering & Technology
Electrical Engineering Technology
Name:
Name:
Name:
EET 215: Intro. To Instrumentation
Computer Simulation Homework – Part -A
Group Work
Due Date:
Signature:
Signature:
Signature:
Date:
Date:
Date:

1-
2-
Answer all questions completely and clearly
Investigate the simulation results to maximize the benefit.
For each problem, submit the circuit diagram, simulation results, and answers to the questions.
Assume all diodes are Silicon and that the diode drop in forward bias is 0.7V.
Problem No. 1. Silicon Diode Basics (No Simulation – Just Calculations)
For the circuits shown, determine Vo and I
L
A-
D4
1N4001G
V2
12 V
IL
+ Vo
R2
200Ω
-
B-
V2
12 V
D4
1N4001G
IL
+ Vo
R2
200Ω
-

Problem No. 2. Diode I-V Characteristics.
Simulate the circuit shown to plot the I-V diode characteristics.
100Ω
1N4001G
1Ω
Where:
The input and scope setting are shown here:
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A
_
+
B
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Ext T rig
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From the plot, if a tangential line to the vertical curve is drawn, it will cross the horizontal (VD) axis at what value? -------------------
Problem No. 3. Clipper
Simulate the following circuits and answer all questions
A- The first circuit is:

470Ω
1N4001G
The Scope and input signal setting are:
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A
_
+
B
_
Ext T rig
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_
This circuit is called --------------------?
Explain the resulting waveform (Why does it have the shape and values shown)?
B- Repeat the problem above after reversing the diode’s direction.

C- Simulate the circuit shown and explain the results.
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A
_
+
B
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Ext T rig
+
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470Ω
1N4001G
1N4001G
Problem No. 4
Half-Wave Rectifiers (HWR)
Simulate the circuit shown and answer the questions:
Note, the transformer chosen is a generic transformer. Double click on it and ensure that the primary to secondary turn ratio is set to 1
Generic Transformer
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A
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+
B
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Ext T rig
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1N4004G
70.7 Vrms
60 Hz
0°
100Ω

From the simulation results:
1- What is the output frequency?
2-
3-
4-
What is the peak output voltage?
What would be the theoretical peak output voltage?
What is the expected DC content of the output waveform? Show calculation
5- What is the expected output waveform and output DC content if the diode’s direction is revered?
Problem No. 5. Full-Wave Rectifier (FWR)
For the circuit shown:
A- Calculations – no simulation yet.
1- What is the primary peak voltage?
2- just a note here : This is a 25:1 C.T transformer. However, the way it is labeled in this software is such that the secondary voltage to C.T is refelcted in this transformer’s ratio. Typically, when the turn ratio of a C.T transformer is given, the peak voltage at the secondary to C.T would be half the total leg to leg voltge.
But here, it is leg to C.T. (100 Votls at primary, and thus the secondary to C.T would be 100V/25 = 4
Volts for this transformer.)
3- What is the expected output peak voltage?

4-
5-
What is the expected output frequency?
What is the expected output DC content?
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A
_
+
B
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Ext T rig
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70.7 Vrms
60 Hz
0°
TS_MISC_25_TO_1
1N4004G
1kΩ
1N4004G
B- Simulate the circuit and explain results.
Problem No. 6. Full-Wave Bridge.
Simulate the circuit and :
1-
2-
Explain the results
What is the output Frequency?
3-
4-
What is the calculated output peak voltage? Show calculations
What is the DC content of the output waveform?

70.7 Vrms
60 Hz
0°
TS_MISC_25_TO_1
1B4B42 1kΩ
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A
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+
B
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Ext T rig
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