Version 4
SHEET 1 1880 680
WIRE 160 -160 112 -160
WIRE 272 -160 240 -160
WIRE 560 -160 528 -160
WIRE 688 -160 640 -160
WIRE -112 -112 -112 -128
WIRE -112 -112 -256 -112
WIRE -112 -64 -112 -112
WIRE 112 -64 112 -160
WIRE 160 -64 112 -64
WIRE 272 -64 272 -160
WIRE 272 -64 224 -64
WIRE 528 -48 528 -160
WIRE 576 -48 528 -48
WIRE 688 -48 688 -160
WIRE 688 -48 640 -48
WIRE -256 -16 -256 -32
WIRE -256 -16 -320 -16
WIRE -112 32 -112 16
WIRE -112 32 -192 32
WIRE -112 48 -112 32
WIRE -192 64 -192 32
WIRE -192 64 -256 64
WIRE 208 80 208 48
WIRE -16 96 -64 96
WIRE 112 96 112 -64
WIRE 112 96 64 96
WIRE 176 96 112 96
WIRE 624 96 624 64
WIRE 272 112 272 -64
WIRE 272 112 240 112
WIRE 304 112 304 64
WIRE 304 112 272 112
WIRE 336 112 304 112
WIRE 528 112 528 -48
WIRE 528 112 480 112
WIRE 592 112 528 112
WIRE -64 128 -64 96
WIRE 176 128 128 128
WIRE 688 128 688 -48
WIRE 688 128 656 128
WIRE 720 128 720 80
WIRE 720 128 688 128
WIRE 752 128 720 128
WIRE 592 144 544 144
WIRE 208 160 208 144
WIRE 624 176 624 160
WIRE -64 224 -64 208
WIRE 816 256 816 128
WIRE 816 256 -16 256
WIRE 160 304 112 304
WIRE 272 304 240 304
WIRE 592 320 544 320
WIRE 704 320 672 320
WIRE 112 400 112 304
WIRE 160 400 112 400
WIRE 272 400 272 304
WIRE 272 400 224 400
WIRE 544 416 544 320
WIRE 592 416 544 416
WIRE 704 416 704 320
WIRE 704 416 656 416
WIRE 208 544 208 512
WIRE -16 560 -16 256
WIRE 112 560 112 400
WIRE 112 560 64 560
WIRE 176 560 112 560
WIRE 640 560 640 528
WIRE 272 576 272 400
WIRE 272 576 240 576
WIRE 304 576 304 512
WIRE 304 576 272 576
WIRE 336 576 304 576
WIRE 416 576 400 576
WIRE 544 576 544 416
WIRE 544 576 496 576
WIRE 608 576 544 576
WIRE 176 592 128 592
WIRE 704 592 704 416
WIRE 704 592 672 592
WIRE 736 592 736 512
WIRE 736 592 704 592
WIRE 768 592 736 592
WIRE 608 608 560 608
WIRE 208 624 208 608
WIRE 640 640 640 624
FLAG -112 48 0
FLAG -112 -128 +12V
FLAG -320 -16 vm
FLAG 208 160 0
FLAG 208 48 +12V
FLAG 128 128 vm
FLAG 624 176 0
FLAG 624 64 +12V
FLAG 544 144 vm
FLAG 208 624 0
FLAG 208 512 +12V
FLAG 128 592 vm
FLAG 640 640 0
FLAG 640 528 +12V
FLAG 560 608 vm
FLAG -64 224 0
FLAG 304 64 int1
FLAG 720 80 int2
FLAG 304 512 int3
FLAG 736 512 int4
SYMBOL voltage -64 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 12 1u 10n 10n 1m 2m)
SYMBOL Opamps\\LTC6241 208 112 R0
SYMATTR InstName U1
SYMBOL voltage -112 -80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL res -272 -128 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res -272 -32 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res 80 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 47k
SYMBOL cap 224 -80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 20n
SYMBOL Opamps\\LTC6241 624 128 R0
SYMATTR InstName U2
SYMBOL res 496 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 20k
SYMBOL cap 640 -64 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 20n
SYMBOL cap 400 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 1u
SYMBOL Opamps\\LTC6241 208 576 R0
SYMATTR InstName U3
SYMBOL res 80 544 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 20k
SYMBOL cap 224 384 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 20n
SYMBOL cap 816 112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C6
SYMATTR Value 1u
SYMBOL Opamps\\LTC6241 640 592 R0
SYMATTR InstName U4
SYMBOL res 512 560 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 20k
SYMBOL cap 656 400 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C7
SYMATTR Value 20n
SYMBOL cap 400 560 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C8
SYMATTR Value 1u
SYMBOL res 256 -176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 200k
SYMBOL res 656 -176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 200k
SYMBOL res 256 288 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 200k
SYMBOL res 688 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 200k
TEXT -280 136 Left 2 !.tran 500m