Version 4
SHEET 1 2876 952
WIRE 1312 -80 1168 -80
WIRE 1376 -80 1312 -80
WIRE 1520 -80 1456 -80
WIRE 1584 -80 1520 -80
WIRE 1728 -80 1664 -80
WIRE 1840 -80 1728 -80
WIRE 1312 -32 1312 -80
WIRE 1520 -32 1520 -80
WIRE 1728 -32 1728 -80
WIRE 704 -16 608 -16
WIRE 944 -16 704 -16
WIRE 608 0 608 -16
WIRE 944 48 944 -16
WIRE 704 80 704 -16
WIRE 816 80 704 80
WIRE 1312 80 1312 32
WIRE 1312 80 1216 80
WIRE 1376 80 1312 80
WIRE 1520 80 1520 32
WIRE 1520 80 1456 80
WIRE 1600 80 1520 80
WIRE 1728 80 1728 32
WIRE 1728 80 1680 80
WIRE 1808 80 1728 80
WIRE 608 96 608 80
WIRE 1120 112 1216 80
WIRE 1120 112 1072 112
WIRE 816 128 336 128
WIRE 336 144 336 128
WIRE 1168 144 1168 -80
WIRE 1168 144 1072 144
WIRE 2384 144 2128 144
WIRE 2464 144 2384 144
WIRE 2464 160 2464 144
WIRE 816 176 752 176
WIRE 2128 192 2128 144
WIRE 752 208 752 176
WIRE 752 208 496 208
WIRE 816 208 752 208
WIRE 336 224 336 208
WIRE 2384 224 2384 144
WIRE 2384 224 2256 224
WIRE 1216 256 1072 256
WIRE 1280 256 1216 256
WIRE 1424 256 1360 256
WIRE 1488 256 1424 256
WIRE 1632 256 1568 256
WIRE 1888 256 1632 256
WIRE 2000 256 1952 256
WIRE 2464 256 2464 240
WIRE 816 272 592 272
WIRE 2592 272 2256 272
WIRE 1152 288 1072 288
WIRE 1888 288 1952 256
WIRE 1888 288 1728 288
WIRE 1952 288 1888 256
WIRE 2000 288 1952 288
WIRE 2592 288 2592 272
WIRE 1216 304 1216 256
WIRE 1424 304 1424 256
WIRE 1632 304 1632 256
WIRE 704 320 704 80
WIRE 816 320 704 320
WIRE 2432 320 2256 320
WIRE 2432 352 2432 320
WIRE 2432 352 2256 352
WIRE 592 368 592 272
WIRE 2592 384 2592 352
WIRE 944 400 944 368
WIRE 1840 400 1840 -80
WIRE 2000 400 1840 400
WIRE 1152 416 1152 288
WIRE 1216 416 1216 368
WIRE 1216 416 1152 416
WIRE 1280 416 1216 416
WIRE 1424 416 1424 368
WIRE 1424 416 1360 416
WIRE 1488 416 1424 416
WIRE 1632 416 1632 368
WIRE 1632 416 1568 416
WIRE 1728 416 1728 288
WIRE 1728 416 1632 416
WIRE 2336 416 2256 416
WIRE 2432 416 2432 352
WIRE 1808 432 1808 80
WIRE 2000 432 1808 432
WIRE 2384 464 2384 224
WIRE 2384 464 2256 464
WIRE 496 480 496 208
WIRE 592 496 592 448
WIRE 2336 528 2336 416
WIRE 2432 544 2432 496
WIRE 1472 560 1424 560
WIRE 1600 560 1552 560
WIRE 2128 560 2128 512
WIRE 496 576 496 560
WIRE 2336 640 2336 608
FLAG 944 400 0
FLAG 608 96 0
FLAG 336 224 0
FLAG 592 496 0
FLAG 2464 256 COM
FLAG 2592 384 COM
FLAG 2128 560 COM
FLAG 1424 560 0
FLAG 496 576 0
FLAG 1600 560 COM
FLAG 2432 544 COM
FLAG 2336 640 COM
SYMBOL voltage 608 -16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 3.3
SYMBOL cap 320 144 R0
WINDOW 123 22 65 Left 2
WINDOW 3 37 35 Left 2
SYMATTR Value2 Rpar=1Meg
SYMATTR InstName C1
SYMATTR Value 5p
SYMBOL LTC2865 944 208 R0
SYMATTR InstName U1
SYMBOL LTC2865 2128 352 M0
SYMATTR InstName U2
SYMBOL voltage 2464 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 3.3
SYMBOL voltage 592 352 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value PULSE(0 3.3 .1u 4n 4n 42n 100n 10)
SYMBOL voltage 1568 560 R90
WINDOW 123 74 56 VTop 2
WINDOW 39 53 56 VTop 2
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName V5
SYMATTR Value SINE(0 20 1Meg)
SYMBOL ind 1376 240 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 53 56 VTop 2
SYMATTR InstName L1
SYMATTR Value 50n
SYMATTR Value2 Rser=10
SYMBOL cap 1200 304 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL cap 1408 304 R0
SYMATTR InstName C3
SYMATTR Value 100p
SYMBOL cap 1616 304 R0
SYMATTR InstName C5
SYMATTR Value 100p
SYMBOL ind 1584 240 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 53 56 VTop 2
SYMATTR InstName L2
SYMATTR Value 50n
SYMATTR Value2 Rser=10
SYMBOL ind 1376 432 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
WINDOW 123 -16 56 VBottom 2
SYMATTR InstName L3
SYMATTR Value 50n
SYMATTR Value2 Rser=10
SYMBOL ind 1584 432 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
WINDOW 123 -16 56 VBottom 2
SYMATTR InstName L4
SYMATTR Value 50n
SYMATTR Value2 Rser=10
SYMBOL ind 1472 -96 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 53 56 VTop 2
SYMATTR InstName L5
SYMATTR Value 50n
SYMATTR Value2 Rser=10
SYMBOL cap 1296 -32 R0
SYMATTR InstName C6
SYMATTR Value 100p
SYMBOL cap 1504 -32 R0
SYMATTR InstName C7
SYMATTR Value 100p
SYMBOL cap 1712 -32 R0
SYMATTR InstName C8
SYMATTR Value 100p
SYMBOL ind 1680 -96 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 53 56 VTop 2
SYMATTR InstName L6
SYMATTR Value 50n
SYMATTR Value2 Rser=10
SYMBOL ind 1472 96 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
WINDOW 123 -16 56 VBottom 2
SYMATTR InstName L7
SYMATTR Value 50n
SYMATTR Value2 Rser=10
SYMBOL ind 1696 96 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
WINDOW 123 -16 56 VBottom 2
SYMATTR InstName L8
SYMATTR Value 50n
SYMATTR Value2 Rser=10
SYMBOL voltage 496 464 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V6
SYMATTR Value PWL(0 3.3 1.2u 3.3 +10n 0)
SYMBOL voltage 2432 400 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V7
SYMATTR Value PWL(0 0 1.2u 0 +10n 3.3)
SYMBOL voltage 2336 512 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V8
SYMATTR Value PULSE(0 3.3 1.5u 4n 4n 42n 100n 10)
SYMBOL cap 2576 288 R0
WINDOW 123 20 60 Left 2
WINDOW 3 43 35 Left 2
SYMATTR Value2 Rpar=1Meg
SYMATTR InstName C2
SYMATTR Value 5p
TEXT 2520 704 Left 2 !.tran 3u
TEXT 1456 -144 Left 2 ;Twisted pair
TEXT 1368 200 Left 2 ;Twisted pair
TEXT 1440 -192 Bottom 2 ;Forward transmission from DIF to ROF  followed by\nreverse transmission from DIR to ROR
RECTANGLE Normal 1792 144 1264 -176 2
RECTANGLE Normal 1712 496 1184 176 2