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EENG 2910: Circuit Design and Analysis Using PSpice Class 5a: AC Circuit Analysis 5b: Op-Amp Circuit Analysis. Oluwayomi Adamo Department of Electrical Engineering College of Engineering, University of North Texas. 5a. New Parts Needed for AC Analysis. AC Sources VAC and IAC - PowerPoint PPT Presentation
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EENG 2910: Circuit Design and Analysis Using PSpiceClass 5a: AC Circuit Analysis 5b: Op-Amp Circuit Analysis
Oluwayomi Adamo
Department of Electrical Engineering
College of Engineering, University of North Texas
EENG 2910, Class 5 2
5a. New Parts Needed for AC Analysis AC Sources
VAC and IAC Both are form “source.olb” The ACMAG and ACPHASE properties can be configured in the Property Editor. For AC sources, you can also set DC value. But for AC analysis, you can set DC
value to zero. The frequency f of the AC source is configured in Simulation Profile Editor. The
frequency needs to be in the Hz unit. The simulation type for AC analysis is AC Sweep/Noise.
Printer Parts IPRINT is used to print current into the output file. VPRINT1 (with one lead) and VPRINT2 (with two lead) are used to print voltage
into the output file. Both IPRINT and VPRINT are from “special.olb” In Property Editor you can configure to select which property to print. For
example, REAL, IMAG, MAG, PHASE. Put “y” for a property, if you want to print that property.
If one of the fields does not appear in the property editor for some of the printers, add it by pressing the “New Column …” button in the property editor.
AAetfA j )2cos(
EENG 2910, Class 5 3
New Command Needed in PSpice AD To plot magnitude
V( ) or VM( ) and I() or IM( ) for peak value in linear scale VDB( ) and IDB in dB scale
To plot phase VP( ) and IP( ) for phase
To plot real part and imaginary part VR( ), VI( ), IR( ), II( )
EENG 2910, Class 5 4
Coupled Inductors
The symbol for mutual coupling is K. The mutual coupling part is the “K-Linear” from “analog.olb”. K-Linear can couple up to eight inductors.
The mutual coupling K couples two or more inductors with a coupling coefficient k. The coupling coefficient k:
PSpice assumes a dot on the first node of each inductor. Read the book, page 145, for more details.
21
,10LL
Mkk
M is mutual inductance
EENG 2910, Class 5 5
Example 5.2
9
V1ACMAG = 1VACPHASE = 0
R3
8VV
0
V
8
6
L3
50uH1 2
3
7
C310uF
L2
50uH1 2
C210uF
5R2
1
R1
2
L1
50uH1 21
C110uF
V3ACMAG = 1VACPHASE = 0
2
V2ACMAG = 1VACPHASE = 0
4
Figure 5.2.1
Figure 5.2.2
Frequency
100Hz 10KHz 100KHzVP(3) VP(6) VP(9)
-200d
-100d
0dVM(3)/VM(1) VM(6)/VM(1) VM(9)/VM(1)
0
1.0
2.0
3.0
SEL>>
EENG 2910, Class 5 6
Example 5.4
Time
0s 25ms 50ms-I(Ra) -I(Rb) -I(Rc) -I(Vx)
-40A
0A
40AAVG(V(1)*I(Ra))+AVG(V(2)*I(Rb))+AVG(V(3)*I(Rc))
0W
2.5KW
5.0KW
SEL>>
C1
150uF
12
Van
FREQ = 60
VAMPL = 169.7VOFF = 0
PHASE = 0
R3
10
b
0
2
6
5Ry
1
Rz
1
Load
I
3
Ra
0.5
n
4
cRc0.5
C
Vx
0Vdc
10
9
Transmission Line
L1
120mH
1 2
R1
5
R2
10
Vbn
FREQ = 60
VAMPL = 169.7VOFF = 0
PHASE = -120
Generator
I
I
11
A 71 a
B
Rx
1
Rb0.5
Vcn
FREQ = 60
VAMPL = 169.7VOFF = 0
PHASE = -240
8
I
The AC source is VSIN
Both of these vertical lines are dashed lines, not wires!
Figure 5.4.1
Figure 5.4.2
EENG 2910, Class 5 7
5b. Op Amps Circuit Example 10.2
Time
0s 2.0ms 4.0msV(OUT)
-4.0V
0V
4.0V
SEL>>
V(V1:+)-2.0V
0V
2.0V
Figure 10.2.1
(Your final drawing of circuit schematics)
Figure 10.2.2
Question: Please explain the relation between V(V1:+) and V(out).
EENG 2910, Class 5 8
Example 10.4
Frequency
10KHz 100MHz10Hzabs(VP(7))
0d
50d
100d
SEL>>
VM(7)0V
0.5V
1.0V
Figure 10.4.1
(Your final drawing of circuit schematics)
Figure 10.4.2
EENG 2910, Class 5 9
Assignment 5
Repeat and reproduce the results for Examples 5.2, and 5.4.
Repeat and reproduce the results for Examples 10.2, and 10.4,
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