* SPICE netlist
XU1 N006 N007 N005 0 N003 LTC6752 ;pnba +In)-In)VCC)VEE)Q
I1 N001 0 PULSE(0 2m 0.2u 5n 100n 0 1)
XU2 0 N001 N005 0 N004 ADA4891-1 ;pnba In+)In-)V+)V-)OUT
C1 N004 N001 50p
R1 N002 N001 10k
V1 N005 0 5
V2 N007 0 50m
R3 N004 N002 2k
XU3 N004 N006 N005 0 N006 ADA4891-4 ;pnba In+)In-)V+)V-)OUT
XU4 N003 N002 N005 0 N002 ADA4891-4 ;pnba In+)In-)V+)V-)OUT
XU5 N012 N013 N011 0 N009 LTC6752 ;pnba +In)-In)VCC)VEE)Q
I2 N008 0 PULSE(0 2m 0.2u 5n 100n 0 1)
XU6 0 N008 N011 0 N010 ADA4891-1 ;pnba In+)In-)V+)V-)OUT
C2 N010 N008 50p
R2 N009 N008 10k
V3 N011 0 5
V4 N013 0 50m
R4 N010 N009 2k
XU7 N010 N012 N011 0 N012 ADA4891-4 ;pnba In+)In-)V+)V-)OUT
.tran 5u

* LTspice schematic (.asc)
Version 4
SHEET 1 1072 1008
WIRE 360 -504 -56 -504
WIRE -56 -472 -56 -504
WIRE -360 -456 -536 -456
WIRE -200 -456 -280 -456
WIRE -136 -456 -200 -456
WIRE -88 -456 -136 -456
WIRE 296 -456 -24 -456
WIRE -200 -440 -200 -456
WIRE -88 -440 -88 -456
WIRE 24 -424 -24 -424
WIRE -136 -392 -136 -456
WIRE 24 -392 24 -424
WIRE 24 -392 -136 -392
WIRE -536 -344 -536 -456
WIRE -360 -344 -536 -344
WIRE -200 -344 -200 -360
WIRE -200 -344 -296 -344
WIRE -56 -328 -56 -408
WIRE -56 -328 -264 -328
WIRE -40 -328 -56 -328
WIRE 184 -328 -40 -328
WIRE 40 -296 -120 -296
WIRE -40 -280 -40 -328
WIRE 184 -280 184 -328
WIRE -264 -264 -264 -328
WIRE -264 -264 -328 -264
WIRE -120 -264 -120 -296
WIRE -72 -264 -120 -264
WIRE 152 -264 88 -264
WIRE -536 -248 -536 -344
WIRE -360 -248 -536 -248
WIRE 296 -248 296 -456
WIRE 296 -248 216 -248
WIRE -200 -232 -200 -344
WIRE -200 -232 -296 -232
WIRE -72 -232 -200 -232
WIRE -8 -232 -8 -248
WIRE 40 -232 40 -296
WIRE 40 -232 -8 -232
WIRE 152 -232 40 -232
WIRE -360 -216 -392 -216
WIRE -536 -184 -536 -248
WIRE -264 -168 -264 -264
WIRE 88 -168 88 -264
WIRE -536 -56 -536 -104
WIRE -392 -56 -392 -216
WIRE -392 -56 -536 -56
WIRE -328 -56 -328 -200
WIRE -328 -56 -392 -56
WIRE -264 -56 -264 -88
WIRE -264 -56 -328 -56
WIRE -40 -56 -40 -216
WIRE -40 -56 -264 -56
WIRE 88 -56 88 -88
WIRE 88 -56 -40 -56
WIRE 184 -56 184 -216
WIRE 184 -56 88 -56
WIRE 360 -56 360 -504
WIRE 360 -56 184 -56
WIRE 376 -56 360 -56
WIRE 184 -40 184 -56
WIRE -200 88 -376 88
WIRE -40 88 -120 88
WIRE 456 88 -40 88
WIRE -40 104 -40 88
WIRE -376 200 -376 88
WIRE -200 200 -376 200
WIRE -40 200 -40 184
WIRE -40 200 -136 200
WIRE 120 216 -104 216
WIRE 344 216 120 216
WIRE 200 248 40 248
WIRE 120 264 120 216
WIRE 344 264 344 216
WIRE -104 280 -104 216
WIRE -104 280 -168 280
WIRE 40 280 40 248
WIRE 88 280 40 280
WIRE 312 280 248 280
WIRE -376 296 -376 200
WIRE -200 296 -376 296
WIRE 456 296 456 88
WIRE 456 296 376 296
WIRE -40 312 -40 200
WIRE -40 312 -136 312
WIRE 88 312 -40 312
WIRE 152 312 152 296
WIRE 200 312 200 248
WIRE 200 312 152 312
WIRE 312 312 200 312
WIRE -200 328 -232 328
WIRE -376 360 -376 296
WIRE -104 376 -104 280
WIRE 248 376 248 280
WIRE -376 488 -376 440
WIRE -232 488 -232 328
WIRE -232 488 -376 488
WIRE -168 488 -168 344
WIRE -168 488 -232 488
WIRE -104 488 -104 456
WIRE -104 488 -168 488
WIRE 120 488 120 328
WIRE 120 488 -104 488
WIRE 248 488 248 456
WIRE 248 488 120 488
WIRE 344 488 344 328
WIRE 344 488 248 488
WIRE 536 488 344 488
WIRE 344 504 344 488
FLAG 184 -40 0
FLAG 344 504 0
SYMBOL Comparators\\LTC6752 184 -312 R0
SYMATTR InstName U1
SYMBOL current -536 -184 R0
SYMATTR Value PULSE(0 2m 0.2u 5n 100n 0 1)
SYMATTR InstName I1
SYMBOL OpAmps\\ADA4891 -328 -296 R0
SYMATTR InstName U2
SYMBOL cap -296 -360 R90
SYMATTR InstName C1
SYMATTR Value 50p
SYMBOL res -264 -472 R90
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL voltage -264 -184 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage 88 -184 R0
SYMATTR InstName V2
SYMATTR Value 50m
SYMBOL res -184 -344 R180
SYMATTR InstName R3
SYMATTR Value 2k
SYMBOL OpAmps\\ADA4891-4 -40 -312 R0
SYMATTR InstName U3
SYMBOL OpAmps\\ADA4891-4 -56 -376 R180
SYMATTR InstName U4
SYMBOL Comparators\\LTC6752 344 232 R0
SYMATTR InstName U5
SYMBOL current -376 360 R0
SYMATTR Value PULSE(0 2m 0.2u 5n 100n 0 1)
SYMATTR InstName I2
SYMBOL OpAmps\\ADA4891 -168 248 R0
SYMATTR InstName U6
SYMBOL cap -136 184 R90
SYMATTR InstName C2
SYMATTR Value 50p
SYMBOL res -104 72 R90
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL voltage -104 360 R0
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL voltage 248 360 R0
SYMATTR InstName V4
SYMATTR Value 50m
SYMBOL res -24 200 R180
SYMATTR InstName R4
SYMATTR Value 2k
SYMBOL OpAmps\\ADA4891-4 120 232 R0
SYMATTR InstName U7