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University Of Sharjah
Electrical and Electronic Engineering Department
Circuit Analysis I laboratory
0402203
Experiment # 2
Introduction to PSPICE – Part I (DC Analysis)
The word ‘PSPICE’ is an acronym for ‘PC based simulation program with integrated circuit emphasis’
PSpice for windows provides a fully integrated environment to capture analog/digital circuits directly on
the monitor, simulate the circuit action, and analyze the results in graphical form. It is easy to learn and
simple to use.
THE CIRCUIT ANALYSIS PROCESS:
Under The Design Center software package umbrella there are three major interactive programs:
Schematics, PSpice, and Probe. These programs are used to design, modify, or analyze a circuit. We call
on these programs during a four-step process: draw the circuit under Schematics, select the mode of
analysis under Schematics, simulate the circuit under Pspice, and display the results under Probe.
1. TO DRAW THE CIRCUIT UNDER SCHEMATICS:
Terminology:
CLICKL: Click using the left button of the mouse.
DCLICKL: Double click using the left button of the mouse.
First you have to select the part to draw by DCLICKL on the icon shown in Fig. 1 or choose ‘get new
part’ form ‘DRAW’ menu. To get a window as shown in Fig 2. To draw a part, you get it either by Part
Name or Description. Table 1 show the Part Names.
Figure 1
Elements
Resistor
Capacitor
Inductor
Ground
parts
name
R
C
L
AGND
Circuit Analysis I Lab Manual
Voltage Sources
Figure 2
parts
name
VDC
VAC
E
DC
AC
Voltage Controlled
Voltage Source (VCVS)
Current Controlled
H
Voltage Source (CCVS)
Table 1
Current Sources
DC
AC
Voltage Controlled
Current Source (VCCS)
Current Controlled
Current Source (CCCS)
parts
name
IDC
IAC
G
F
5
After you get the part you want, place it in the workspace. Repeat this till you get all what you need, as
shown in Fig 3., then CLICKL on Close.
After closing the window, place the components in an ordered way. CLICKL on the component, it will
be highlighted in red and then DRAG it to the location you want. Do the same for all parts. Some times
you need to rotate (and/or flip) a part by Ctrl+R or you need to flip a part by Ctrl+F. Also, these are
done by CLICKL on EDIT menu then CLICKL on ROTATE or FLIP (remember that the part to be
rotated/flipped is highlighted red and therefore already selected)
.
Figure 3
Figure 4
After you position every part in the desired place, connect it using wires by clicking on the icon shown
in Fig 4. Now you create the pencil cursor. Drag the pencil cursor to first point to be connected and
CLICKL to anchor the wire, drag the dotted wire to second point, CLICKL to turn wire segment solid.
Repeat this till you connect all points required to be connected.
To change an attribute that is presently displayed, DCLICKL on the
part's attribute (not the symbol) to bring up the Set Attribute Value
dialog box of Fig 5 . Because the value written is highlighted in
blue, any entry will automatically delete and overwrite the old
value.
Now you should choose the type of analysis needed.
Figure 5
2. To SIMULATE THE CIRCUIT:
You have to save the schematic file on disk before simulation. After saving go to ANALYSIS menu
then CLICKL on Simulate, or CLICKL directly on the icon shown in Fig 1. Circuit simulation starts,
and gives you a window indicating this. Press ‘V’ icon to see all node voltages and press ‘I’ icon to see
all currents in the circuit.
 Example 1:
It is required from you to draw the circuit shown in Fig 6 and to find all nodes voltages and all currents
in the circuit.
Figure 6
Circuit Analysis I Lab Manual
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 Example 2:
It is required from you to draw the circuit shown in Fig 7 and to find all nodes voltages and all currents
in the circuit. This circuit contains one voltage controlled voltage sources (VCVS) and one voltage
controlled current source (VCCS). Figure 8 shows the PSPICE diagrams of these dependent sources.
Each diagram is divided into a voltmeter at the left side and a source (voltage or current) at the right
side. The voltmeter must be connected in parallel to the required voltage that is to be measured, while
the sources side is connected according to the circuit. The PSPICE diagram for this circuit is shown in
Figure 9.
Figure 7
Figure 8
Figure 9
 Example 3:
It is required from you to draw the circuit shown in Fig 10 and to find all nodes voltages and all
currents in the circuit. This circuit contains one current controlled voltage sources (CCVS) and one
current controlled current source (CCCS). Figure 11 shows the PSPICE diagrams of these dependent
sources. Each diagram is divided into an ammeter at the left side and a source (voltage or current) at the
right side. The ammeter must be connected in series with the required current that is to be measured,
while the sources side is connected according to the circuit. The PSPICE diagram for this circuit is
shown in Figure 12.
Figure 10
Circuit Analysis I Lab Manual
Figure 11
7
Figure 12
ASSIGNMENT:
For the circuit shown below complete the following questions:
1. Use hand calculations to find i1 and ix.
2. Use PSPICE to find i1 and ix .
3. Compare the results.
For the circuit shown below complete the following questions:
4. Use hand calculations to find vA.
5. Use PSPICE to find vA.
6. Compare the results.
Circuit Analysis I Lab Manual
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