* SPICE netlist
XU1 2.1V N010 6.6V 0 N007 LT1001 ;pnba In+)In-)V+)V-)OUT
XU2 2.5V N010 6.6V 0 N022 LT1001 ;pnba In+)In-)V+)V-)OUT
XU3 3.0V N010 6.6V 0 N020 LT1001 ;pnba In+)In-)V+)V-)OUT
XU4 4.0V N010 6.6V 0 N016 LT1001 ;pnba In+)In-)V+)V-)OUT
V1 2.1V 0 2.1V
V2 2.5V 0 2.5V
V3 3.0V 0 3.0V
V4 4.0V 0 4.0V
V5 6.6V 0 6.6V
V6 5.0V 0 5V
A7 N007 0 0 0 0 N008 0 0 BUF
A8 N022 0 0 0 0 N013 0 0 BUF
A9 N020 0 0 0 0 N014 0 0 BUF
A10 N016 0 0 0 0 N025 0 0 BUF
V7 12.0V 0 12V
A1 0 N008 N013 N014 N016 0 N012 0 AND
A2 0 N008 N013 N020 0 0 N018 0 AND
A3 0 N008 0 N022 0 0 N019 0 AND

* LTspice schematic (.asc)
Version 4
SHEET 1 2912 1552
WIRE 384 -776 352 -776
WIRE 144 -760 96 -760
WIRE -240 -744 -336 -744
WIRE 96 -744 96 -760
WIRE 96 -744 16 -744
WIRE 576 -744 352 -744
WIRE 144 -712 96 -712
WIRE 528 -712 352 -712
WIRE 96 -696 96 -712
WIRE -560 -680 -592 -680
WIRE -592 -648 -592 -680
WIRE 896 -472 608 -472
WIRE 896 -424 640 -424
WIRE -96 -392 -1088 -392
WIRE -416 -344 -864 -344
WIRE -304 -344 -416 -344
WIRE 400 -312 320 -312
WIRE -1456 -280 -1456 -376
WIRE -1248 -280 -1456 -280
WIRE -96 -280 -96 -392
WIRE 112 -280 -96 -280
WIRE 336 -280 320 -280
WIRE -1088 -264 -1088 -392
WIRE -1088 -264 -1184 -264
WIRE -1056 -264 -1088 -264
WIRE -864 -264 -864 -344
WIRE -864 -264 -992 -264
WIRE -512 -264 -864 -264
WIRE -144 -264 -448 -264
WIRE -512 -248 -576 -248
WIRE 112 -248 80 -248
WIRE -512 -232 -560 -232
WIRE 80 -232 80 -248
WIRE 1456 -232 960 -232
WIRE -512 -216 -544 -216
WIRE 640 -216 640 -424
WIRE 736 -216 640 -216
WIRE 608 -168 608 -472
WIRE 736 -168 608 -168
WIRE 1408 -168 960 -168
WIRE 1408 -152 1408 -168
WIRE 1456 -152 1456 -232
WIRE -416 -136 -416 -344
WIRE -400 -136 -416 -136
WIRE -112 -136 -336 -136
WIRE 400 -136 400 -312
WIRE 400 -136 320 -136
WIRE 512 -136 400 -136
WIRE 576 -136 576 -744
WIRE 736 -136 576 -136
WIRE -400 -120 -448 -120
WIRE 112 -120 -192 -120
WIRE -400 -104 -432 -104
WIRE 336 -104 320 -104
WIRE -1456 -72 -1456 -280
WIRE -1248 -72 -1456 -72
WIRE 112 -72 80 -72
WIRE -1104 -56 -1184 -56
WIRE -1056 -56 -1104 -56
WIRE -576 -56 -576 -248
WIRE -576 -56 -992 -56
WIRE -448 -56 -448 -120
WIRE -448 -56 -576 -56
WIRE 80 -56 80 -72
WIRE 400 24 400 -136
WIRE 400 24 320 24
WIRE -112 56 -112 -136
WIRE 112 56 -112 56
WIRE 336 56 320 56
WIRE -304 72 -304 -344
WIRE -288 72 -304 72
WIRE -192 72 -192 -120
WIRE -192 72 -224 72
WIRE 112 88 80 88
WIRE -1104 104 -1104 -56
WIRE -288 104 -1104 104
WIRE 80 104 80 88
WIRE -432 136 -432 -104
WIRE -432 136 -1104 136
WIRE -1456 168 -1456 -72
WIRE -1248 168 -1456 168
WIRE -1104 184 -1104 136
WIRE -1104 184 -1184 184
WIRE -1056 184 -1104 184
WIRE -560 184 -560 -232
WIRE -560 184 -992 184
WIRE 400 184 400 24
WIRE 400 184 320 184
WIRE -144 216 -144 -264
WIRE 112 216 -144 216
WIRE 336 216 320 216
WIRE 112 248 80 248
WIRE 80 264 80 248
WIRE -544 360 -544 -216
WIRE -544 360 -1104 360
WIRE 384 392 336 392
WIRE -1456 408 -1456 168
WIRE -1232 408 -1456 408
WIRE 336 408 336 392
WIRE 336 408 320 408
WIRE 384 408 384 392
WIRE -1104 424 -1104 360
WIRE -1104 424 -1168 424
WIRE -1056 424 -1104 424
WIRE 16 424 -992 424
WIRE 16 440 16 424
WIRE 112 440 16 440
WIRE 528 440 528 -712
WIRE 528 440 320 440
WIRE 112 472 80 472
WIRE 512 472 512 -136
WIRE 512 472 320 472
WIRE 80 488 80 472
FLAG -1216 -232 0
FLAG -1216 -24 0
FLAG -1216 216 0
FLAG -1200 456 0
FLAG -1280 776 0
FLAG -1136 776 0
FLAG -976 776 0
FLAG -832 776 0
FLAG -1280 696 2.1V
IOPIN 112 1120 BiDir
FLAG -1248 -248 2.1V
IOPIN 144 176 BiDir
FLAG -1136 696 2.5V
IOPIN 256 1120 BiDir
FLAG -1248 -40 2.5V
IOPIN 144 384 BiDir
FLAG -976 696 3.0V
IOPIN 416 1120 BiDir
FLAG -1248 200 3.0V
IOPIN 144 624 BiDir
FLAG -832 696 4.0V
IOPIN 560 1120 BiDir
FLAG -1232 440 4.0V
IOPIN 160 864 BiDir
FLAG -1440 696 6.6V
IOPIN -48 1120 BiDir
FLAG -1216 -296 6.6V
IOPIN 176 128 BiDir
FLAG -1216 -88 6.6V
IOPIN 176 336 BiDir
FLAG -1216 152 6.6V
IOPIN 176 576 BiDir
FLAG -1200 392 6.6V
IOPIN 192 816 BiDir
FLAG -672 776 0
FLAG -672 696 5.0V
IOPIN 720 1120 BiDir
FLAG 80 -232 0
FLAG 80 488 0
FLAG 384 408 0
FLAG 96 -696 0
FLAG -512 776 0
FLAG -512 696 12.0V
IOPIN 880 1120 BiDir
FLAG -592 -648 0
FLAG -560 -776 5.0V
IOPIN 832 -352 In
FLAG 112 -328 5.0V
IOPIN 1504 96 In
FLAG 80 -56 0
FLAG 112 -152 5.0V
IOPIN 1504 272 In
FLAG 80 104 0
FLAG 112 8 5.0V
IOPIN 1504 432 In
FLAG 80 264 0
FLAG 112 168 5.0V
IOPIN 1504 592 In
FLAG 112 392 5.0V
IOPIN 1504 816 In
FLAG 736 -248 12.0V
IOPIN 2128 176 In
FLAG 736 -24 5.0V
IOPIN 2128 400 In
FLAG -1440 776 0
FLAG 384 -776 0
SYMBOL OpAmps\\OP07 -1216 -328 R0
SYMATTR InstName U1
SYMBOL OpAmps\\OP07 -1216 -120 R0
SYMATTR InstName U2
SYMBOL OpAmps\\OP07 -1216 120 R0
SYMATTR InstName U3
SYMBOL OpAmps\\OP07 -1200 360 R0
SYMATTR InstName U4
SYMBOL voltage -1280 680 R0
SYMATTR InstName V1
SYMATTR Value 2.1V
SYMBOL voltage -1136 680 R0
SYMATTR InstName V2
SYMATTR Value 2.5V
SYMBOL voltage -976 680 R0
SYMATTR InstName V3
SYMATTR Value 3.0V
SYMBOL voltage -832 680 R0
SYMATTR InstName V4
SYMATTR Value 4.0V
SYMBOL voltage -1440 680 R0
SYMATTR InstName V5
SYMATTR Value 6.6V
SYMBOL voltage -672 680 R0
SYMATTR InstName V6
SYMATTR Value 5V
SYMBOL Digital\\inv -1056 -328 R0
SYMATTR InstName A7
SYMBOL Digital\\inv -1056 -120 R0
SYMATTR InstName A8
SYMBOL Digital\\inv -1056 120 R0
SYMATTR InstName A9
SYMBOL Digital\\inv -1056 360 R0
SYMATTR InstName A10
SYMBOL voltage -512 680 R0
SYMATTR InstName V7
SYMATTR Value 12V
SYMBOL Digital\\and -480 -312 R0
SYMATTR InstName A1
SYMBOL Digital\\and -368 -184 R0
SYMATTR InstName A2
SYMBOL Digital\\and -256 24 R0
SYMATTR InstName A3