Download Computer Simulation HW-A 2013

California University of Pennsylvania
Department of Applied Engineering & Technology
Electrical Engineering Technology
EET 215: Intro. To Instrumentation
Computer Simulation Homework – Part -A
Group Work
Due Date: (see web page)
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Signature:
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1-
Answer all questions completely and clearly
2-
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 IL
AD4
+ Vo
1N4001G
R2
200Ω
IL
V2
12 V
-
BD4
+ Vo
1N4001G
V2
12 V
IL
R2
200Ω
-
Problem No. 2. Diode I-V Characteristics.
Simulate the circuit shown to plot the I-V diode characteristics.
100Ω
Ext T rig
+
1N4001G
_
B
A
+
_
+
_
1Ω
Where:
The input and scope setting are shown here:
1- Neatly sketch the waveform as seen on the scope
2- From the plot, if a tangential line to the vertical curve is drawn, it will cross the horizontal (VD) axis at
what value? ---------------Volts-
Problem No. 3. Clipper
Simulate the following circuits and answer all questions
A-
The first circuit is:
Ext T rig
+
_
470Ω
B
A
+
_
1N4001G
The Scope and input signal setting are:
Neatly sketch the waveform as seen on the scope.
This circuit is called --------------------?
The maximum positive output value is: -----------The minimum output value is: -----------------
+
_
B- Repeat the problem above after reversing the diode’s direction.
Neatly sketch the waveform as seen on the scope
This circuit is called --------------------?
The maximum positive output value is: -----------The minimum output value is: ----------------C-
Simulate the circuit shown and explain the results.
Ext T rig
+
_
B
A
+
_
+
470Ω
1N4001G
1N4001G
Neatly sketch the waveform as seen on the scope
This circuit is called --------------------?
The maximum positive output value is: -----------The minimum output value is: -----------------
_
Problem No. 4 (the transformer as was done in lab today – the one without C.T )
Half-Wave Rectifiers (HWR)
Simulate the circuit shown and answer the questions:
Note, the transformer chosen is a generic transformer.
This transformer will be used in rest of circuits.
Make sure to note that, unlike typical labeling, the 10:1 ration is reflecting the voltage leg-to- center tap
in this software. Thus, the secondary leg-to-center tap is 100V/10 = 10V, and leg-to-leg = 20V
XSC1
Ext T rig
+
_
1
D1
V1
3
100 Vpk
60 Hz
0°
B
A
+
_
1N4001G
4
T1
R1
100Ω
TS_POWER_10_TO_1
2
0
From the simulation results:
1-
Neatly sketch the waveform as seen on the scope
2-
What is the output period and frequency ? --------------- ms, ----------Hz
3-
What is the peak output voltage? --------------- Volts (use cursor on the scope screen.)
+
_
4-
What would be the theoretical peak output voltage? --------------- ?
5-
What is the expected DC content of the output waveform?
a- Calculations:
b- using the simulated result, place a DMM across the output and measure the DC value
Vo(dc) = ----------------- Volts
6What is the expected output waveform and output DC content if the diode’s direction is
revered?
Place answer here :
Problem No. 5. Full-Wave Rectifier (FWR)
For the circuit shown:
A-
Calculations – no simulation yet.
1-
What is the secondary peak voltage leg-to C.T ? ---------Volts
2-
What is the expected output peak voltage?
3-
What is the expected output period and frequency? T = ------------ ms, f = --- Hz.
4-
What is the expected output DC content? Show calculations
XSC1
Ext T rig
+
_
1
D1
4
V1
1N4001G
3
100 Vpk
60 Hz
0°
T1
6
R1
D2
TS_POWER_10_TO_1
2
B-
2-
100Ω
0
1N4001G
Simulate the circuit and, sign measurements, answer the following:
1- Neatly sketch the waveform as seen on the scope
Vo(pk) = ------------- ?
3- Output frequency is : ----------------- ?
4- Output DC value = -----------------? (use DMM)
B
A
+
_
+
_
Problem No. 6. Revers the diodes in Problem No. 5 and repeat the question
Problem No. 7. Full-Wave Bridge. (You may have to sue the 3N257 FWB in place of the diodes shown)
A- Calculations (no simulation)
1-
Neatly sketch the expected waveform.
2-
What is the output period and frequency? T = ----------, f= ------------------
3-
What is the calculated output peak voltage? Show calculations
4-
What is the DC content of the output waveform?
XSC1
3
Ext T rig
+
_
1
4
V1
1
100 Vpk
60 Hz
0°
T1
4
D1
3
R1
2
1B4B42
200Ω
TS_POWER_10_TO_1
2
6
0
B- Simulation
1-
Neatly sketch the expected waveform as seen on the scope.
2-
What is the output period and frequency? T = ----------, f= ------------------
3-
What is the output peak voltage?
4-
What is the DC content of the output waveform (use DMM)?
B
A
+
_
+
_
Problem No. 7 Clampers
A- For the negative clamper circuit shown, Vin is 5V peak triangular waveform at 100Hz.
Calculations:
1- Sketch, neatly, the expected output waveform. Label all critical points.
2- What is the maximum positive value? ------------ Volts
3- What is maximum negative value ? (the lowest peak value ) -----------------?
4- Does the waveform distort or does it merely shift (dc offset )? ------------Simulation
1- From the simulation result, sketch the output waveform
2- Use the cursor on the scope to determine Vo(pk) up and down ----------------, --------------3- What is Vo(pk-pk) ? ---------------, Is Vout(pk-pk) equal to Vin (pk – pk )?
XSC1
XFG1
Ext T rig
+
C1
_
B
A
+
1µF
2
1
R1
D1
100kΩ
1N4001G
0
Scope and function generator settings are shown below
_
+
_
B- Repeat for a negative clamper (this is achieved by reversing the diode and the cap (the cap since it
is polarized)
XSC1
XFG1
Ext T rig
+
C1
1
2
_
1µF
R1
D1
1N4001G
0
1- Sketch the simulated output waveform
B
A
+
100kΩ
_
+
_
2- What are the maximum up and down swings ? ----------------------, ----------------
3- What is Vo(pk-pk) ? ---------------, Is Vout(pk-pk) equal to Vin (pk – pk )?