* SPICE netlist
R1 N011 N015 3.3k tol=0.1
R2 N011 N016 3.3k tol=0.1
R3 N016 0 82 tol=0.1
V1 N011 0 5V
XU1 N017 N012 N001 N010 N013 LT1001 ;pnba In+)In-)V+)V-)OUT
R5 N013 N012 140k tol=0.1
R6 N017 0 140k tol=0.1
R7 N012 N016 8.2k tol=0.1
R8 N017 N004 8.2k tol=0.1
V2 N001 0 5V
V3 0 N010 5V
D1 0 N013 D
D2 N013 N014 D
V4 N014 0 3.3
R4 N009 N005 103.9 tol=0.1
R9 N015 N009 1.1
R10 N005 0 1.1
XU2 N009 N007 N001 N010 N007 LT1001 ;pnba In+)In-)V+)V-)OUT
XU3 N005 N002 N001 N010 N002 LT1001 ;pnba In+)In-)V+)V-)OUT
XU4 N008 N003 N001 N010 N004 LT1001 ;pnba In+)In-)V+)V-)OUT
R11 N003 N002 8.2k
R12 N004 N003 8.2k
R13 N008 N007 8.2k
R14 N008 0 8.2k
.tran 1

* LTspice schematic (.asc)
Version 4
SHEET 1 1728 1024
WIRE -128 -512 -416 -512
WIRE 736 -512 -128 -512
WIRE -416 -464 -416 -512
WIRE -416 -464 -512 -464
WIRE -272 -448 -480 -448
WIRE -160 -448 -176 -448
WIRE -48 -448 -80 -448
WIRE -416 -432 -416 -464
WIRE -480 -416 -480 -448
WIRE -448 -416 -480 -416
WIRE -272 -400 -272 -448
WIRE -272 -400 -384 -400
WIRE -448 -384 -784 -384
WIRE -128 -384 -128 -512
WIRE -512 -368 -512 -464
WIRE -272 -368 -272 -400
WIRE -224 -368 -224 -400
WIRE -176 -368 -176 -448
WIRE -176 -368 -192 -368
WIRE -160 -368 -176 -368
WIRE -544 -352 -592 -352
WIRE -48 -352 -48 -448
WIRE -48 -352 -96 -352
WIRE -352 -336 -480 -336
WIRE -336 -336 -352 -336
WIRE -192 -336 -256 -336
WIRE -160 -336 -192 -336
WIRE -544 -320 -704 -320
WIRE -192 -320 -192 -336
WIRE -592 -272 -592 -352
WIRE -352 -272 -352 -336
WIRE -352 -272 -592 -272
WIRE -512 -208 -512 -304
WIRE -416 -208 -416 -368
WIRE -416 -208 -512 -208
WIRE -128 -208 -128 -320
WIRE -128 -208 -416 -208
WIRE -656 -144 -864 -144
WIRE -512 -144 -576 -144
WIRE -192 -96 -192 -240
WIRE 736 -48 736 -512
WIRE 736 -48 320 -48
WIRE 352 64 240 64
WIRE 464 64 432 64
WIRE 544 64 544 48
WIRE -864 80 -864 -144
WIRE -784 80 -784 -384
WIRE -704 80 -704 -320
WIRE -592 80 -624 80
WIRE -512 80 -512 -144
WIRE 544 80 544 64
WIRE 96 144 -304 144
WIRE 320 144 320 -48
WIRE 96 160 96 144
WIRE 240 160 240 64
WIRE 240 160 176 160
WIRE 288 160 240 160
WIRE 464 176 464 64
WIRE 464 176 352 176
WIRE 544 176 544 144
WIRE 544 176 464 176
WIRE 624 176 544 176
WIRE 736 176 736 32
WIRE 864 176 736 176
WIRE 288 192 240 192
WIRE 544 208 544 176
WIRE -304 224 -304 144
WIRE -304 224 -608 224
WIRE -48 240 -48 -352
WIRE 96 240 -48 240
WIRE 240 240 240 192
WIRE 240 240 176 240
WIRE 240 272 240 240
WIRE 736 272 736 176
WIRE -864 288 -864 80
WIRE -704 288 -864 288
WIRE -608 288 -608 224
WIRE -608 288 -624 288
WIRE -592 288 -608 288
WIRE -512 288 -512 80
WIRE 320 352 320 208
WIRE 736 352 320 352
WIRE -416 512 -416 -208
WIRE 736 512 736 352
WIRE 736 512 -416 512
FLAG 240 352 0
FLAG 864 176 0
FLAG 544 -16 0
FLAG 544 272 0
FLAG -192 -96 0
FLAG -864 -144 0
DATAFLAG 400 -512 ""
SYMBOL res -496 64 R90
SYMATTR InstName R1
SYMATTR Value 3.3k
SYMATTR SpiceLine tol=0.1
SYMBOL res -496 272 R90
SYMATTR InstName R2
SYMATTR Value 3.3k
SYMATTR SpiceLine tol=0.1
SYMBOL res -608 272 R90
SYMATTR InstName R3
SYMATTR Value 82
SYMATTR SpiceLine tol=0.1
SYMBOL voltage -560 -144 R90
SYMATTR InstName V1
SYMATTR Value 5V
SYMBOL OpAmps\\OP07 320 112 R0
SYMATTR InstName U1
SYMBOL res 448 48 R90
SYMATTR InstName R5
SYMATTR Value 140k
SYMATTR SpiceLine tol=0.1
SYMBOL res 224 256 R0
SYMATTR InstName R6
SYMATTR Value 140k
SYMATTR SpiceLine tol=0.1
SYMBOL res 192 144 R90
SYMATTR InstName R7
SYMATTR Value 8.2k
SYMATTR SpiceLine tol=0.1
SYMBOL res 192 224 R90
SYMATTR InstName R8
SYMATTR Value 8.2k
SYMATTR SpiceLine tol=0.1
SYMBOL voltage 736 -64 R0
SYMATTR InstName V2
SYMATTR Value 5V
SYMBOL voltage 736 256 R0
SYMATTR InstName V3
SYMATTR Value 5V
SYMBOL diode 560 272 R180
SYMATTR InstName D1
SYMBOL diode 560 144 R180
SYMATTR InstName D2
SYMBOL voltage 544 80 R180
SYMATTR InstName V4
SYMATTR Value 3.3
SYMBOL res -688 64 R90
SYMATTR InstName R4
SYMATTR Value 103.9
SYMATTR SpiceLine tol=0.1
SYMBOL res -608 64 R90
SYMATTR InstName R9
SYMATTR Value 1.1
SYMBOL res -768 64 R90
SYMATTR InstName R10
SYMATTR Value 1.1
SYMBOL OpAmps\\OP07 -512 -400 R0
SYMATTR InstName U2
SYMBOL OpAmps\\OP07 -416 -464 R0
SYMATTR InstName U3
SYMBOL OpAmps\\OP07 -128 -416 R0
SYMATTR InstName U4
SYMBOL res -176 -384 R90
SYMATTR InstName R11
SYMATTR Value 8.2k
SYMBOL res -64 -464 R90
SYMATTR InstName R12
SYMATTR Value 8.2k
SYMBOL res -240 -352 R90
SYMATTR InstName R13
SYMATTR Value 8.2k
SYMBOL res -208 -336 R0
SYMATTR InstName R14
SYMATTR Value 8.2k