*version 8.0 326605004
u 296
LOPASS? 2
E? 3
LAPLACE? 5
R? 9
V? 3
C? 5
@libraries
@analysis
.AC 1 1 0
+0 101
+1 0.1
+2 2
@targets
@attributes
@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 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 2570 
@status
c 80:00:01:06:44:40;315585880
n 0 80:00:03:08:57:14;315766634 e 
s 0 80:00:03:08:57:33;315766653 e 
*page 1 0 970 720 iA
@ports
port 98 AGND 140 230 h
port 278 AGND 520 230 h
@parts
part 4 LAPLACE 200 180 h
a 0 sp 0 0 14 48 hln 100 PART=LAPLACE
a 0 a 0:13 0 0 0 hln 100 PKGREF=LAPLACE1
a 0 ap 0 0 -12 -2 hln 100 REFDES=LAPLACE1
a 0 u 13 0 28 18 hlb 100 NUM=1
a 0 u 13 0 -34 34 hlb 100 DENOM=1+(s/6.283)*(s/6.283+0.618)
part 50 VAC 140 190 h
a 0 sp 0 0 0 50 hln 100 PART=VAC
a 0 x 0:13 0 0 0 hln 100 PKGREF=Vi
a 0 u 13 0 -7 35 hcn 100 ACMAG=1V
a 1 xp 9 0 -8 12 hcn 100 REFDES=Vi
part 140 LAPLACE 440 180 h
a 0 sp 0 0 14 48 hln 100 PART=LAPLACE
a 0 a 0:13 0 0 0 hln 100 PKGREF=LAPLACE4
a 0 ap 0 0 -12 -2 hln 100 REFDES=LAPLACE4
a 0 u 13 0 28 16 hlb 100 NUM=1
a 0 u 13 0 8 34 hlb 100 DENOM=1+s/6.283
part 73 LAPLACE 340 180 h
a 0 sp 0 0 14 48 hln 100 PART=LAPLACE
a 0 a 0:13 0 0 0 hln 100 PKGREF=LAPLACE2
a 0 ap 0 0 -12 -2 hln 100 REFDES=LAPLACE2
a 0 u 13 0 26 18 hlb 100 NUM=1
a 0 u 13 0 -32 34 hlb 100 DENOM=1+(s/6.283)*(s/6.283+1.618)
part 273 R 520 230 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 x 0:13 0 0 0 hln 100 PKGREF=R
a 0 xp 9 0 17 4 hln 100 REFDES=R
a 0 u 13 0 17 29 hln 100 VALUE=1k
part 1 titleblk 970 720 h
a 1 s 13 0 350 10 hcn 100 PAGESIZE=A
a 1 s 13 0 180 60 hcn 100 PAGETITLE=
a 1 s 13 0 340 95 hrn 100 PAGECOUNT=1
a 1 s 13 0 300 95 hrn 100 PAGENO=1
@conn
w 259
a 0 up 0:33 0 0 0 hln 100 V=
s 140 190 140 180 94
a 0 up 0:33 0 142 185 hlt 100 V=
s 140 180 200 180 263
w 254
a 0 up 0:33 0 0 0 hln 100 V=
s 340 180 260 180 269
a 0 up 33 0 300 179 hct 100 V=
w 128
a 0 up 0:33 0 0 0 hln 100 V=
s 440 180 400 180 289
a 0 up 33 0 465 179 hct 100 V=
w 253
a 0 sr 0:3 0 522 185 hln 100 LABEL=Vo
a 0 up 0:33 0 0 0 hln 100 V=
s 520 180 520 190 276
a 0 up 33 0 522 185 hlt 100 V=
a 0 sr 3 0 522 185 hln 100 LABEL=Vo
s 500 180 520 180 274
@junction
j 200 180
+ p 4 IN
+ w 259
j 140 230
+ s 98
+ p 50 -
j 140 190
+ p 50 +
+ w 259
j 340 180
+ p 73 IN
+ w 254
j 260 180
+ p 4 OUT
+ w 254
j 440 180
+ p 140 IN
+ w 128
j 400 180
+ p 73 OUT
+ w 128
j 500 180
+ p 140 OUT
+ w 253
j 520 190
+ p 273 2
+ w 253
j 520 230
+ s 278
+ p 273 1
@attributes
a 0 s 0:13 0 0 0 hln 100 PAGETITLE=
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 281 t 5 240 244 452 262 0 48
Plotting the function H(s) = H1(s)*H2(s)*H3(s)  
t 71 t 5 220 145 249 161 0 2
H1
t 75 t 5 360 144 389 162 0 2
H2
t 137 t 5 460 144 489 162 0 2
H3
t 282 t 5 270 264 432 282 0 34
(5th-Order Butterworth Low-Pass)  
t 295 t 5 270 285 427 301 0 33
Probe Trace:  DB(V(Vo)/V1(Vi))