*version 8.0 1883237198
u 109
I? 5
R? 17
@libraries
@analysis
@targets
@attributes
a SimDataSigDigits=3
@translators
a 0 u 13 0 0 0 hln 100 TANGO=PCB
a 0 u 13 0 0 0 hln 100 SCICARDS=PCB
a 0 u 13 0 0 0 hln 100 PROTEL=PCB
a 0 u 13 0 0 0 hln 100 PCBOARDS=PCB
a 0 u 13 0 0 0 hln 100 PCAD=PCB
a 0 u 13 0 0 0 hln 100 PADS=PCB
a 0 u 13 0 0 0 hln 100 ORCAD=PCB
a 0 u 13 0 0 0 hln 100 EDIF=PCB
a 0 u 13 0 0 0 hln 100 CADSTAR=PCB
a 0 u 13 0 0 0 hln 100 PSPICE=PSPICE
a 0 u 13 0 0 0 hln 100 XILINX=XILINX
@setup
unconnectedPins 0
connectViaLabel 0
connectViaLocalLabels 0
NoStim4ExtIFPortsWarnings 1
AutoGenStim4ExtIFPorts 1
@index
pageloc 1 0 9089 Equivalent Resistance
@status
n 0 100:01:22:12:04:51;951239091 e 
s 0 100:01:22:12:04:52;951239092 e 
c 100:01:23:15:24:41;951337481
*page 1 0 970 720 iA
@ports
port 11 gnd_analog 130 110 h
port 22 gnd_analog 400 100 h
port 28 gnd_analog 690 110 h
port 103 gnd_analog 80 500 h
@parts
part 2 idc 80 110 u
a 0 sp 11 0 0 50 hln 100 PART=idc
a 0 a 0:13 0 0 0 hln 100 PKGREF=I1
a 1 ap 9 0 20 10 hcn 100 REFDES=I1
a 1 u 13 0 -9 21 hcn 100 DC=1A
part 3 r 130 110 v
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R1
a 0 ap 9 0 21 4 hln 100 REFDES=R1
a 0 u 13 0 13 27 hln 100 VALUE=10
part 4 r 180 110 v
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R2
a 0 ap 9 0 15 0 hln 100 REFDES=R2
a 0 u 13 0 15 25 hln 100 VALUE=10
part 15 idc 330 100 u
a 0 sp 11 0 0 50 hln 100 PART=idc
a 1 u 13 0 -9 21 hcn 100 DC=1A
a 0 a 0:13 0 0 0 hln 100 PKGREF=I2
a 1 ap 9 0 20 10 hcn 100 REFDES=I2
part 14 r 460 100 v
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R4
a 0 ap 9 0 15 0 hln 100 REFDES=R4
a 0 u 13 0 17 47 hln 100 VALUE=1MEG
part 13 r 400 100 v
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R3
a 0 ap 9 0 15 0 hln 100 REFDES=R3
a 0 u 13 0 13 29 hln 100 VALUE=1
part 25 idc 620 110 u
a 0 sp 11 0 0 50 hln 100 PART=idc
a 1 u 13 0 -9 21 hcn 100 DC=1A
a 0 a 0:13 0 0 0 hln 100 PKGREF=I3
a 1 ap 9 0 20 10 hcn 100 REFDES=I3
part 26 r 750 110 v
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 u 13 0 17 47 hln 100 VALUE=1MEG
a 0 a 0:13 0 0 0 hln 100 PKGREF=R5
a 0 ap 9 0 15 0 hln 100 REFDES=R5
part 37 r 720 60 u
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R7
a 0 ap 9 0 15 0 hln 100 REFDES=R7
a 0 u 13 0 21 31 hln 100 VALUE=1
part 53 r 140 430 h
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R8
a 0 ap 9 0 15 0 hln 100 REFDES=R8
a 0 u 13 0 15 25 hln 100 VALUE=1
part 62 idc 80 480 u
a 0 sp 11 0 0 50 hln 100 PART=idc
a 0 a 0:13 0 0 0 hln 100 PKGREF=I4
a 1 ap 9 0 20 10 hcn 100 REFDES=I4
a 1 u 13 0 -9 21 hcn 100 DC=1A
part 54 r 220 430 h
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R9
a 0 ap 9 0 15 0 hln 100 REFDES=R9
a 0 u 13 0 15 25 hln 100 VALUE=2
part 55 r 300 430 h
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R10
a 0 ap 9 0 15 0 hln 100 REFDES=R10
a 0 u 13 0 15 25 hln 100 VALUE=3
part 59 r 200 480 v
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R14
a 0 ap 9 0 15 0 hln 100 REFDES=R14
a 0 u 13 0 15 25 hln 100 VALUE=4
part 60 r 280 480 v
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R15
a 0 ap 9 0 15 0 hln 100 REFDES=R15
a 0 u 13 0 15 25 hln 100 VALUE=5
part 61 r 360 480 v
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R16
a 0 ap 9 0 15 0 hln 100 REFDES=R16
a 0 u 13 0 15 25 hln 100 VALUE=6
part 56 r 140 500 h
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R11
a 0 ap 9 0 15 0 hln 100 REFDES=R11
a 0 u 13 0 15 25 hln 100 VALUE=7
part 57 r 220 500 h
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R12
a 0 ap 9 0 15 0 hln 100 REFDES=R12
a 0 u 13 0 15 25 hln 100 VALUE=8
part 58 r 300 500 h
a 0 sp 0 0 0 10 hlb 100 PART=r
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=R13
a 0 ap 9 0 15 0 hln 100 REFDES=R13
a 0 u 13 0 15 25 hln 100 VALUE=9
part 1 titleblk 970 720 h
a 1 s 13 0 350 10 hcn 100 PAGESIZE=A
a 1 u 13 0 10 10 hln 100 CompanyName=Calvin College
a 1 u 13 0 10 20 hln 100 Line1=ENGR204
a 1 u 13 0 10 40 hln 100 Line3=
a 1 u 13 0 150 95 hln 100 Date=February 22, 2000
a 1 u 13 0 10 30 hln 100 Line2=S. VanderLeest
a 1 x 13 0 180 60 hcn 100 PAGETITLE=Equivalent Resistance
a 1 s 13 0 340 95 hrn 100 PAGECOUNT=1
a 1 s 13 0 300 95 hrn 100 PAGENO=1
@conn
w 6
a 0 up 0:33 0 0 0 hln 100 V=
s 130 70 80 70 7
a 0 up 33 0 135 51 hct 100 V=
s 180 70 130 70 5
w 9
a 0 up 0:33 0 0 0 hln 100 V=
s 130 110 80 110 10
a 0 up 33 0 105 109 hct 100 V=
s 180 110 130 110 8
w 17
a 0 up 0:33 0 0 0 hln 100 V=
s 400 60 460 60 18
s 330 60 400 60 16
a 0 up 33 0 401 43 hct 100 V=
w 20
a 0 up 0:33 0 0 0 hln 100 V=
s 400 100 330 100 21
a 0 up 33 0 365 99 hct 100 V=
s 460 100 400 100 19
w 39
a 0 up 0:33 0 0 0 hln 100 V=
s 620 60 620 70 40
s 680 60 620 60 38
a 0 up 33 0 652 45 hct 100 V=
w 43
a 0 up 0:33 0 0 0 hln 100 V=
s 750 60 750 70 44
s 720 60 750 60 42
a 0 up 33 0 753 45 hct 100 V=
w 30
a 0 up 0:33 0 0 0 hln 100 V=
s 690 110 620 110 31
a 0 up 33 0 655 109 hct 100 V=
s 750 110 690 110 29
w 68
a 0 up 0:33 0 0 0 hln 100 V=
s 80 480 80 500 67
s 80 500 140 500 104
a 0 up 33 0 110 499 hct 100 V=
w 64
a 0 up 0:33 0 0 0 hln 100 V=
s 140 430 80 430 63
a 0 up 33 0 110 411 hct 100 V=
s 80 430 80 440 65
w 98
a 0 up 0:33 0 0 0 hln 100 V=
s 220 430 200 430 97
s 200 430 200 440 99
s 200 430 180 430 101
a 0 up 0:33 0 198 409 hct 100 V=
w 92
a 0 up 0:33 0 0 0 hln 100 V=
s 300 430 280 430 91
s 280 430 280 440 93
s 280 430 260 430 95
a 0 up 0:33 0 270 429 hct 100 V=
w 88
a 0 up 0:33 0 0 0 hln 100 V=
s 360 440 360 430 87
s 360 430 340 430 89
a 0 up 0:33 0 350 429 hct 100 V=
w 84
a 0 up 0:33 0 0 0 hln 100 V=
s 340 500 360 500 83
s 360 500 360 480 85
a 0 up 0:33 0 362 490 hlt 100 V=
w 78
a 0 up 0:33 0 0 0 hln 100 V=
s 260 500 280 500 77
s 280 500 280 480 79
s 280 500 300 500 81
a 0 up 0:33 0 290 499 hct 100 V=
w 72
a 0 up 0:33 0 0 0 hln 100 V=
s 180 500 200 500 71
s 200 500 200 480 73
s 200 500 220 500 75
a 0 up 0:33 0 210 499 hct 100 V=
@junction
j 130 110
+ p 3 1
+ s 11
j 80 70
+ p 2 -
+ w 6
j 130 70
+ p 3 2
+ w 6
j 180 70
+ p 4 2
+ w 6
j 80 110
+ p 2 +
+ w 9
j 130 110
+ p 3 1
+ w 9
j 130 110
+ s 11
+ w 9
j 180 110
+ p 4 1
+ w 9
j 400 100
+ p 13 1
+ s 22
j 460 60
+ p 14 2
+ w 17
j 400 60
+ p 13 2
+ w 17
j 330 60
+ p 15 -
+ w 17
j 330 100
+ p 15 +
+ w 20
j 400 100
+ p 13 1
+ w 20
j 400 100
+ s 22
+ w 20
j 460 100
+ p 14 1
+ w 20
j 620 70
+ p 25 -
+ w 39
j 680 60
+ p 37 2
+ w 39
j 750 70
+ p 26 2
+ w 43
j 720 60
+ p 37 1
+ w 43
j 620 110
+ p 25 +
+ w 30
j 690 110
+ s 28
+ w 30
j 750 110
+ p 26 1
+ w 30
j 140 430
+ p 53 1
+ w 64
j 80 440
+ p 62 -
+ w 64
j 80 480
+ p 62 +
+ w 68
j 140 500
+ p 56 1
+ w 68
j 180 500
+ p 56 2
+ w 72
j 200 480
+ p 59 1
+ w 72
j 220 500
+ p 57 1
+ w 72
j 200 500
+ w 72
+ w 72
j 260 500
+ p 57 2
+ w 78
j 280 480
+ p 60 1
+ w 78
j 300 500
+ p 58 1
+ w 78
j 280 500
+ w 78
+ w 78
j 340 500
+ p 58 2
+ w 84
j 360 480
+ p 61 1
+ w 84
j 360 440
+ p 61 2
+ w 88
j 340 430
+ p 55 2
+ w 88
j 300 430
+ p 55 1
+ w 92
j 280 440
+ p 60 2
+ w 92
j 260 430
+ p 54 2
+ w 92
j 280 430
+ w 92
+ w 92
j 220 430
+ p 54 1
+ w 98
j 200 440
+ p 59 2
+ w 98
j 180 430
+ p 53 2
+ w 98
j 200 430
+ w 98
+ w 98
j 80 500
+ s 103
+ w 68
@attributes
a 0 s 0:13 0 0 0 hln 100 PAGETITLE=Equivalent Resistance
a 0 s 0:13 0 0 0 hln 100 PAGENO=1
a 0 s 0:13 0 0 0 hln 100 PAGESIZE=A
a 0 s 0:13 0 0 0 hln 100 PAGECOUNT=1
@graphics
t 24 t 6 810 220 580 140 0 227
For two resistors in series, Req = R7 + R5.  If R5 >> R7, then Req will be very close to just R5 (the larger one).  Pspice verifies that the 1 ohm in series with the 1MEG is seen by the source as Req = V/I = 1 MV / 1A = 1 Mohm.
t 107 t 6 60 540 420 710 0 589
The equivalent resistance, as seen by the source:

Req = 1  + ({2  + [(3+6+9) || 5] + 8} || 4) + 7 
        = 8 + ({10 + [18||5]} || 4)
        = 8 + ({10 + [3.9]} || 4)
        = 8 + (13.9 || 4)
        = 8 + 3.1
        = 11.1 ohm.

This is verified by Pspice, since Req = V/I = 11.1V / 1A = 11.1 ohms.

Note that the 1 and the 2 are NOT in series (because the 4 is connected in between).  Note that the 4 and the 5 are NOT in parallel because the 2 and the 8 are in between.  Only the 3, 6, and 9 can be combined in series at first.  Then other combinations become available.
t 12 t 6 280 140 10 260 0 184
Two equal resistors in parallel can be simplified as Req = R || R = R^2/(2R) = R/2.  Pspice verifies that the resistance seen by the source is V/I = 5V/1A = 5 ohms.  Thus 10 || 10 = 5.
t 108 t 5 210 50 30 10 0 72
Note: Use Analysis->Display Results
->Enable to see simulation answers.
t 23 t 6 290 130 560 250 0 249
For two resistors in parallel, Req = R3 || R4 = (R3*R4)/(R3+R4).  If R4 >> R3, then Req will be very close to just R3 (the smaller one!).  Pspice verifies that the 1 ohm in parallel with the 1MEG is seen by the source as Req = V/I = 1V / 1A = 1 ohm.