*version 9.1 4281955185
u 400
V? 3
C? 8
R? 9
U? 2
? 3
@libraries
@analysis
.AC 1 3 0
+0 1000
+1 300
+2 3k
.TRAN 1 1 0 0
+0 0ns
+1 2.5ms
+3 10us
@targets
@attributes
@translators
a 0 u 13 0 0 0 hln 100 PCBOARDS=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 6080 
@status
n 0 110:05:03:00:06:25;1275487585 e 
s 2833 110:05:03:00:09:27;1275487767 e 
c 110:05:03:00:05:24;1275487524
*page 1 0 970 720 iA
@ports
port 87 GND_ANALOG 630 370 h
@parts
part 27 r 470 190 D
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=Rs1
a 0 u 13 0 21 27 hln 100 VALUE=10k
a 0 xp 9 0 21 6 hln 100 REFDES=Rs1
part 28 r 470 310 D
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=Rs2
a 0 u 13 0 21 27 hln 100 VALUE=10k
a 0 xp 9 0 21 6 hln 100 REFDES=Rs2
part 33 VDC 630 260 h
a 0 sp 0 0 22 37 hln 100 PART=VDC
a 0 x 0:13 0 0 0 hln 100 PKGREF=Vdc
a 1 xp 9 0 18 7 hcn 100 REFDES=Vdc
a 1 u 13 0 17 38 hcn 100 DC=9V
part 34 r 590 290 D
a 0 u 13 0 23 25 hln 100 VALUE=1k
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=Rl
a 0 xp 9 0 23 4 hln 100 REFDES=Rl
part 26 LM324 480 280 U
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=DIP14
a 0 s 0:13 0 0 0 hln 100 GATE=A
a 0 x 0:13 0 0 0 hln 100 PKGREF=IC
a 0 sp 11 0 24 30 hcn 100 PART=LM324
a 0 xp 9 0 22 38 hcn 100 REFDES=ICA
part 2 VSIN 360 280 H
a 1 u 13 13 24 68 hcn 100 VAMPL=10mV
a 1 xp 9 0 28 -4 hcn 100 REFDES=Vin
a 1 u 13 13 30 58 hcn 100 VOFF=0V
a 0 x 0:13 0 0 0 hln 100 PKGREF=Vin
a 1 u 13 13 26 78 hcn 100 FREQ=1kHz
a 1 u 13 13 30 48 hcn 100 AC=1V
a 1 u 13 13 30 38 hcn 100 DC=0V
part 331 c 420 240 h
a 0 u 13 0 9 21 hln 100 VALUE=10n
a 0 x 0:13 0 0 0 hln 100 PKGREF=C2
a 0 xp 9 0 11 4 hln 100 REFDES=C2
a 0 sp 0 0 0 10 hlb 100 PART=c
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=CK05
a 0 s 0:13 0 0 0 hln 100 GATE=
part 330 c 420 200 h
a 0 u 13 0 9 21 hln 100 VALUE=10n
a 0 x 0:13 0 0 0 hln 100 PKGREF=C1
a 0 xp 9 0 11 4 hln 100 REFDES=C1
a 0 sp 0 0 0 10 hlb 100 PART=c
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=CK05
a 0 s 0:13 0 0 0 hln 100 GATE=
part 346 r 380 240 h
a 0 u 13 0 13 21 hln 100 VALUE=1.6k
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=R1A
a 0 xp 9 0 13 4 hln 100 REFDES=R1A
part 329 r 450 200 D
a 0 u 13 0 25 31 hln 100 VALUE=318k
a 0 x 0:13 0 0 0 hln 100 PKGREF=R2
a 0 xp 9 0 23 6 hln 100 REFDES=R2
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=
part 360 r 420 280 D
a 0 xp 9 0 21 6 hln 100 REFDES=R1B
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=R1B
a 0 u 13 0 21 29 hln 100 VALUE=1.6k
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
part 111 nodeMarker 590 260 h
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=Vo
a 0 s 0 0 0 0 hln 100 PROBEVAR=ICA:OUT
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 a 0 0 4 22 hlb 100 LABEL=2
part 110 nodeMarker 360 240 v
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=Vi
a 0 s 0 0 0 0 hln 100 PROBEVAR=Vi
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 a 0 0 4 22 hlb 100 LABEL=1
@conn
w 343
a 0 up 0:33 0 0 0 hln 100 V=
s 420 320 420 370 365
s 420 370 470 370 372
s 360 320 360 370 77
s 360 370 420 370 318
s 470 350 470 370 314
s 590 370 590 330 41
s 590 370 630 370 345
s 630 370 630 300 183
a 0 up 33 0 632 335 hlt 100 V=
s 470 370 510 370 328
s 520 230 510 230 278
s 510 370 590 370 386
s 510 230 510 370 280
a 0 up 33 0 512 300 hlt 100 V=
w 333
a 0 up 0:33 0 0 0 hln 100 V=
s 420 240 420 280 361
s 420 200 420 240 332
a 0 up 33 0 422 220 hlt 100 V=
w 357
a 0 sr 0 0 0 0 hln 100 LABEL=Vi
a 0 up 0:33 0 0 0 hln 100 V=
s 380 240 360 240 352
a 0 sr 3 0 370 238 hcn 100 LABEL=Vi
s 360 280 360 240 21
a 0 up 33 0 362 260 hlt 100 V=
w 342
a 0 sr 0 0 0 0 hln 100 LABEL=Vo
a 0 up 0:33 0 0 0 hln 100 V=
s 560 260 590 260 296
a 0 sr 3 0 579 258 hcn 100 LABEL=Vo
s 590 260 590 290 37
s 450 200 560 200 336
a 0 up 33 0 505 199 hct 100 V=
s 560 200 560 260 338
w 340
a 0 up 0:33 0 0 0 hln 100 V=
s 630 190 630 260 50
s 470 190 530 190 277
a 0 up 33 0 580 189 hct 100 V=
s 520 290 530 290 273
s 530 190 630 190 396
s 530 290 530 190 275
w 335
a 0 up 0:33 0 0 0 hln 100 V=
s 450 240 480 240 334
a 0 up 33 0 465 239 hct 100 V=
w 228
a 0 up 0:33 0 0 0 hln 100 V=
s 470 310 470 280 267
a 0 up 33 0 472 255 hlt 100 V=
s 470 280 470 230 399
s 470 280 480 280 311
@junction
j 420 240
+ p 331 1
+ p 346 2
j 450 240
+ p 331 2
+ p 329 2
j 450 200
+ p 330 2
+ p 329 1
j 420 320
+ p 360 2
+ w 343
j 360 320
+ p 2 -
+ w 343
j 420 370
+ w 343
+ w 343
j 590 370
+ w 343
+ w 343
j 470 350
+ p 28 2
+ w 343
j 590 330
+ p 34 2
+ w 343
j 630 370
+ s 87
+ w 343
j 630 300
+ p 33 -
+ w 343
j 470 370
+ w 343
+ w 343
j 520 230
+ p 26 V-
+ w 343
j 510 370
+ w 343
+ w 343
j 420 240
+ p 331 1
+ w 333
j 420 240
+ p 346 2
+ w 333
j 420 280
+ p 360 1
+ w 333
j 420 200
+ p 330 1
+ w 333
j 360 280
+ p 2 +
+ w 357
j 360 240
+ p 110 pin1
+ w 357
j 380 240
+ p 346 1
+ w 357
j 590 290
+ p 34 1
+ w 342
j 590 260
+ p 111 pin1
+ w 342
j 450 200
+ p 330 2
+ w 342
j 450 200
+ p 329 1
+ w 342
j 560 260
+ p 26 OUT
+ w 342
j 630 260
+ p 33 +
+ w 340
j 470 190
+ p 27 1
+ w 340
j 520 290
+ p 26 V+
+ w 340
j 530 190
+ w 340
+ w 340
j 480 240
+ p 26 -
+ w 335
j 450 240
+ p 331 2
+ w 335
j 450 240
+ p 329 2
+ w 335
j 470 310
+ p 28 1
+ w 228
j 470 230
+ p 27 2
+ w 228
j 480 280
+ p 26 +
+ w 228
j 470 280
+ w 228
+ w 228
@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
r 43 r 0 570 250 610 380
r 81 r 0 320 230 380 380
t 213 t 5 400 376 540 440 0 152
C1=C2           R1=1/(2*pi*f0*Q*C1)
Q=f0/fBW      R2=2*Q/(2*pi*f0*C1)
R1A||R1B=R1
R1A/(R1A+R1B)=Abp/(2Q^2)
R1A=Q/(Abp*w0*C)
R1B=R1A/(2*(Q^2)/Abp-1)
t 359 t 5 370 436 610 520 0 290
Check for oscillation by determining system poles:
H(s) = -s*R2*C2/(1+(s^2)*R1*R2*C1*C2+s*R1*(C1+C2))
        = s*Abp/(w0*Q)/(1+(s^2)/(w0^2)+s/(w0*Q))

where: s=jw     w0=1/sqrt(R1*R2*C1*C2)

Abp = -R2/R1/(1+C1/C2)   Q=sqrt(R2/R1)/(sqrt(C1/C2)+sqrt(C2/C1))
if C1=C2 then Abp=-2*(Q^2)