*version 8.0 1096046590
u 225
E? 3
R? 4
V? 3
@libraries
@analysis
.DC 1 0 0 0 1 1
+ 0 0 vI
+ 0 4 -300uV
+ 0 5 300uV
+ 0 6 1uV
.TRAN 0 0 0 0
+0 100u
+1 2m
+2 0
+3 100u
@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
a 0 u 13 0 0 0 hln 100 PCBOARDS=PCB
@setup
unconnectedPins 0
connectViaLabel 0
connectViaLocalLabels 0
NoStim4ExtIFPortsWarnings 1
AutoGenStim4ExtIFPorts 1
@index
pageloc 1 0 2011 
@status
n 0 80:00:01:06:43:23;315585803 e 
s 2832 80:00:01:06:43:24;315585804 e 
c 100:00:01:00:04:10;946713850
*page 1 0 970 720 iA
@ports
port 12 agnd 390 250 h
@parts
part 70 vdc 340 210 h
a 0 sp 0 0 22 37 hln 100 PART=vdc
a 1 u 13 0 -11 34 hcn 100 DC=0V
a 0 x 0:13 0 0 0 hln 100 PKGREF=vI
a 1 xp 9 0 -12 15 hcn 100 REFDES=vI
part 3 EVALUE 370 210 h
a 0 x 0:13 0 0 0 hln 100 PKGREF=E1
a 1 xp 9 0 18 2 hln 100 REFDES=E1
a 0 sp 11 0 -76 -12 hln 100 PART=EVALUE
a 0 u 13 0 -30 -12 hln 100 EXPR={10*((exp(2e4*v(2,1))-1)/(exp(2e4*v(2,1))+1))}
part 5 r 450 250 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 19 6 hln 100 REFDES=R
a 0 u 13 0 19 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 169
a 0 sr 0 0 0 0 hln 100 LABEL=2
a 0 up 0:33 0 0 0 hln 100 V=
s 340 210 370 210 173
a 0 sr 3 0 368 206 hcn 100 LABEL=2
a 0 up 33 0 368 207 hct 100 V=
w 72
a 0 sr 0 0 0 0 hln 100 LABEL=vO
a 0 up 0:33 0 0 0 hln 100 V=
s 450 210 420 210 101
a 0 up 33 0 445 209 hct 100 V=
a 0 sr 3 0 435 208 hcn 100 LABEL=vO
w 222
a 0 sr 0:3 0 372 237 hln 100 LABEL=1
a 0 up 0:33 0 0 0 hln 100 V=
s 370 220 370 250 170
a 0 sr 3 0 372 237 hln 100 LABEL=1
s 370 250 340 250 188
s 420 250 390 250 186
s 420 220 420 250 23
a 0 up 33 0 422 240 hlt 100 V=
s 420 250 450 250 75
s 390 250 370 250 217
@junction
j 420 210
+ p 3 OUT+
+ w 72
j 370 220
+ p 3 IN-
+ w 222
j 370 210
+ p 3 IN+
+ w 169
j 340 210
+ p 70 +
+ w 169
j 340 250
+ p 70 -
+ w 222
j 450 210
+ p 5 2
+ w 72
j 420 250
+ w 222
+ w 222
j 390 250
+ s 12
+ w 222
j 420 220
+ p 3 OUT-
+ w 222
j 450 250
+ p 5 1
+ w 222
j 370 250
+ w 222
+ w 222
@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 118 t 5 330 275 455 291 0 29
Circuit to Plot Fig. 1.23a.  
t 224 t 5 300 295 508 311 0 43
Top Trace: V(vO);  Bottom Trace: D(V(vO))