* SPICE netlist
V2 VSP 0 5V
V3 0 VSN 5V
V1 N003 N012 PULSE(0 1m 1m 5n 5n 50m 100m)
R12 N012 0 10k
XU1 N003 N001 VSP VSN N002 level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
XU2 N012 N010 VSP VSN N011 level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R1 N001 N010 330
R2 N002 N001 12k
R3 N011 N010 12k
R4 N004 N002 10k
R5 N005 N004 10k
R6 N009 N011 10k
R7 0 N009 10k
R8 N007 N005 36k
XU3 N009 N004 VSP VSN N005 level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R9 N008 N007 36k
C1 N007 Vout 100n
C2 N008 0 100n
XU4 N008 N006 VSP VSN Vout level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R11 Vout N006 10k
R10 N006 0 20k
.tran 200m

* LTspice schematic (.asc)
Version 4
SHEET 1 2032 672
WIRE -168 -320 -216 -320
WIRE -56 -304 -104 -304
WIRE -168 -288 -456 -288
WIRE -56 -256 -56 -304
WIRE 56 -256 -56 -256
WIRE 168 -256 136 -256
WIRE 184 -256 168 -256
WIRE 424 -256 264 -256
WIRE 760 -208 728 -208
WIRE 856 -208 840 -208
WIRE 872 -208 856 -208
WIRE 984 -208 952 -208
WIRE 728 -192 728 -208
WIRE -856 -176 -952 -176
WIRE -952 -144 -952 -176
WIRE -216 -112 -216 -320
WIRE -56 -112 -56 -256
WIRE -56 -112 -136 -112
WIRE 856 -80 856 -208
WIRE 888 -80 856 -80
WIRE -456 -64 -456 -288
WIRE -216 -64 -216 -112
WIRE 168 -64 168 -256
WIRE 312 -64 168 -64
WIRE 984 -64 984 -208
WIRE 984 -64 952 -64
WIRE 1016 -64 984 -64
WIRE 424 -48 424 -256
WIRE 424 -48 376 -48
WIRE 552 -48 424 -48
WIRE 680 -48 632 -48
WIRE 712 -48 680 -48
WIRE 824 -48 792 -48
WIRE 888 -48 824 -48
WIRE -952 -32 -952 -64
WIRE -952 -32 -1016 -32
WIRE 312 -32 168 -32
WIRE -1016 -16 -1016 -32
WIRE -952 0 -952 -32
WIRE 680 48 680 -48
WIRE 824 48 824 -48
WIRE -216 80 -216 16
WIRE -56 80 -136 80
WIRE -952 112 -952 80
WIRE -856 112 -952 112
WIRE 824 128 824 112
WIRE -56 160 -56 80
WIRE 56 160 -56 160
WIRE 168 160 168 -32
WIRE 168 160 136 160
WIRE 184 160 168 160
WIRE 296 160 264 160
WIRE 680 176 680 112
WIRE 984 176 984 -64
WIRE 984 176 680 176
WIRE -216 192 -216 80
WIRE -168 192 -216 192
WIRE 296 192 296 160
WIRE -56 208 -56 160
WIRE -56 208 -104 208
WIRE -456 224 -456 16
WIRE -168 224 -456 224
WIRE -456 240 -456 224
WIRE -456 336 -456 320
FLAG -1016 -16 0
FLAG -856 -176 VSP
FLAG -856 112 VSN
FLAG -456 336 0
FLAG -136 -336 VSP
FLAG -136 176 VSP
FLAG -136 -272 VSN
FLAG -136 240 VSN
FLAG 296 192 0
FLAG 344 -80 VSP
FLAG 344 -16 VSN
FLAG 824 128 0
FLAG 728 -192 0
FLAG 920 -96 VSP
FLAG 920 -32 VSN
FLAG 1016 -64 Vout
SYMBOL voltage -952 -160 R0
SYMATTR InstName V2
SYMATTR Value 5V
SYMBOL voltage -952 -16 R0
SYMATTR InstName V3
SYMATTR Value 5V
SYMBOL voltage -456 -80 R0
SYMATTR InstName V1
SYMATTR Value PULSE(0 1m 1m 5n 5n 50m 100m)
SYMBOL res -472 224 R0
SYMATTR InstName R12
SYMATTR Value 10k
SYMBOL OpAmps\\UniversalOpAmp2 -136 -304 R0
SYMATTR InstName U1
SYMBOL OpAmps\\UniversalOpAmp2 -136 208 R0
SYMATTR InstName U2
SYMBOL res -232 -80 R0
SYMATTR InstName R1
SYMATTR Value 330
SYMBOL res -120 -128 R90
SYMATTR InstName R2
SYMATTR Value 12k
SYMBOL res -120 64 R90
SYMATTR InstName R3
SYMATTR Value 12k
SYMBOL res 152 -272 R90
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 280 -272 R90
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res 152 144 R90
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res 280 144 R90
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL res 648 -64 R90
SYMATTR InstName R8
SYMATTR Value 36k
SYMBOL OpAmps\\UniversalOpAmp2 344 -48 R0
SYMATTR InstName U3
SYMBOL res 808 -64 R90
SYMATTR InstName R9
SYMATTR Value 36k
SYMBOL cap 664 48 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 808 48 R0
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL OpAmps\\UniversalOpAmp2 920 -64 R0
SYMATTR InstName U4
SYMBOL res 968 -224 R90
SYMATTR InstName R11
SYMATTR Value 10k
SYMBOL res 856 -224 R90
SYMATTR InstName R10
SYMATTR Value 20k