* SPICE netlist
XU1 0 N002 +V -V N008 level1 Avol=1Meg GBW=10Meg Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R1 N003 N002 1K
R2 N002 N001 1K
R4 N003 N008 50
C1 N008 N002 100p
XU2 0 N006 +V -V N007 level1 Avol=1Meg GBW=10Meg Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R5 N007 N006 1K
R6 N006 N001 1K
T3 N005 0 A 0 Td=100n Z0=50
XU3 0 N004 +V -V N005 level1 Avol=1Meg GBW=10Meg Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
V7 -V 0 -10
V8 +V 0 10
R8 N005 N004 1K
R9 N004 N001 1K
V9 N001 0 PWL(0 0 100n 0 101n 1)
R10 A 0 500
R11 N009 N007 50
T1 N009 0 B 0 Td=100n Z0=50
R3 B 0 500
T2 N003 0 C 0 Td=100n Z0=50
R7 C 0 500
.tran 5u

* LTspice schematic (.asc)
Version 4
SHEET 1 1872 560
WIRE 456 -40 440 -40
WIRE 440 -40 440 -168
WIRE 440 -264 456 -264
WIRE 536 -264 664 -264
WIRE 664 -264 664 -24
WIRE 664 -24 648 -24
WIRE 440 -264 408 -264
WIRE 328 -264 -376 -264
WIRE 440 -8 456 -8
WIRE 568 -24 552 -24
WIRE 440 -168 456 -168
WIRE 520 -168 552 -168
WIRE 440 -168 440 -264
WIRE 552 -168 552 -24
WIRE 552 -24 520 -24
WIRE -232 -40 -248 -40
WIRE -248 -40 -248 -184
WIRE -248 -184 -232 -184
WIRE -152 -184 -120 -184
WIRE -120 -184 -120 -24
WIRE -248 -184 -280 -184
WIRE -360 -184 -376 -184
WIRE -248 -8 -232 -8
WIRE -120 -24 -168 -24
WIRE -632 40 -632 8
WIRE -632 8 -584 8
WIRE -488 8 -440 8
WIRE -440 8 -440 40
WIRE -392 -24 -488 -24
WIRE -584 -24 -648 -24
WIRE -152 280 -152 264
WIRE -744 -72 -744 -56
WIRE -744 8 -744 24
WIRE -24 264 -24 280
WIRE -776 -40 -792 -40
WIRE -792 -40 -792 -200
WIRE -824 -200 -792 -200
WIRE -696 -200 -648 -200
WIRE -648 -200 -648 -24
WIRE -648 -24 -712 -24
WIRE -904 -200 -936 -200
WIRE -936 -200 -936 88
WIRE -792 -8 -776 -8
WIRE -936 168 -936 200
WIRE -392 -24 -392 -8
WIRE -392 72 -392 88
WIRE -792 -200 -776 -200
WIRE -88 -24 -120 -24
WIRE -936 -200 -936 -264
WIRE -936 -264 -376 -264
WIRE -376 -184 -376 -264
WIRE 24 40 24 8
WIRE 24 8 72 8
WIRE 168 8 216 8
WIRE 216 8 216 40
WIRE 264 -24 168 -24
WIRE 72 -24 -8 -24
WIRE 264 -24 264 -8
WIRE 264 72 264 88
WIRE 696 40 696 8
WIRE 696 8 744 8
WIRE 840 8 888 8
WIRE 888 8 888 40
WIRE 936 -24 840 -24
WIRE 744 -24 664 -24
WIRE 936 -24 936 -8
WIRE 936 72 936 88
WIRE -200 -72 -200 -56
WIRE 488 -72 488 -56
WIRE -152 168 -152 184
WIRE -200 8 -200 24
WIRE 488 8 488 24
WIRE -24 184 -24 168
FLAG 440 -8 0
FLAG -248 -8 0
FLAG -440 40 0
FLAG -632 40 0
FLAG -24 280 0
FLAG -152 280 0
FLAG -936 200 0
FLAG -792 -8 0
FLAG -392 88 0
FLAG 216 40 0
FLAG 24 40 0
FLAG 264 88 0
FLAG 888 40 0
FLAG 696 40 0
FLAG 936 88 0
FLAG -392 -24 A
FLAG 264 -24 B
FLAG 936 -24 C
FLAG -744 -72 +V
FLAG -200 -72 +V
FLAG 488 -72 +V
FLAG -152 168 +V
FLAG -744 24 -V
FLAG -200 24 -V
FLAG 488 24 -V
FLAG -24 168 -V
SYMBOL opamps\\UniversalOpamp 488 -24 R0
SYMATTR InstName U1
SYMBOL res 552 -280 R90
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL res 424 -280 R90
SYMATTR InstName R2
SYMATTR Value 1K
SYMBOL res 664 -40 R90
SYMATTR InstName R4
SYMATTR Value 50
SYMBOL cap 520 -184 R90
SYMATTR InstName C1
SYMATTR Value 100p
SYMBOL opamps\\UniversalOpamp -200 -24 R0
SYMATTR InstName U2
SYMBOL res -136 -200 R90
SYMATTR InstName R5
SYMATTR Value 1K
SYMBOL res -264 -200 R90
SYMATTR InstName R6
SYMATTR Value 1K
SYMBOL tline -536 -8 R0
SYMATTR Value Td=100n Z0=50
SYMATTR InstName T3
SYMBOL opamps\\UniversalOpamp -744 -24 R0
SYMATTR InstName U3
SYMBOL voltage -24 168 R0
SYMATTR InstName V7
SYMATTR Value -10
SYMBOL voltage -152 168 R0
SYMATTR InstName V8
SYMATTR Value 10
SYMBOL res -680 -216 R90
SYMATTR InstName R8
SYMATTR Value 1K
SYMBOL res -808 -216 R90
SYMATTR InstName R9
SYMATTR Value 1K
SYMBOL voltage -936 72 R0
SYMATTR InstName V9
SYMATTR Value PWL(0 0 100n 0 101n 1)
SYMBOL res -408 -24 R0
SYMATTR InstName R10
SYMATTR Value 500
SYMBOL res 8 -40 R90
SYMATTR InstName R11
SYMATTR Value 50
SYMBOL tline 120 -8 R0
SYMATTR Value Td=100n Z0=50
SYMATTR InstName T1
SYMBOL res 248 -24 R0
SYMATTR InstName R3
SYMATTR Value 500
SYMBOL tline 792 -8 R0
SYMATTR Value Td=100n Z0=50
SYMATTR InstName T2
SYMBOL res 920 -24 R0
SYMATTR InstName R7
SYMATTR Value 500