Version 4
SHEET 1 2100 680
WIRE -608 -160 -768 -160
WIRE 1472 -160 1312 -160
WIRE 1936 -160 1472 -160
WIRE 1984 -160 1936 -160
WIRE -192 -144 -352 -144
WIRE 272 -144 -192 -144
WIRE 320 -144 272 -144
WIRE 352 -144 320 -144
WIRE 496 -144 432 -144
WIRE 576 -144 496 -144
WIRE 752 -144 656 -144
WIRE 1056 -144 848 -144
WIRE 752 -112 720 -112
WIRE 880 -112 848 -112
WIRE 720 -64 720 -112
WIRE 800 -64 720 -64
WIRE 880 -64 880 -112
WIRE 880 -64 800 -64
WIRE 1312 -64 1312 -160
WIRE -352 -48 -352 -144
WIRE 496 -48 496 -144
WIRE 1168 -48 1168 -80
WIRE 1472 -48 1472 -160
WIRE -496 -32 -496 -64
WIRE -192 -32 -192 -144
WIRE 1744 16 1744 -16
WIRE 80 32 80 0
WIRE 1984 64 1984 -160
WIRE 1984 64 1936 64
WIRE 320 80 320 -144
WIRE 320 80 272 80
WIRE 496 96 496 32
WIRE 1056 112 1056 -144
WIRE 1168 112 1168 16
WIRE 1168 112 1136 112
WIRE 1312 112 1312 16
WIRE 1312 112 1168 112
WIRE 1344 112 1312 112
WIRE 1472 112 1472 16
WIRE 1472 112 1424 112
WIRE 1632 112 1472 112
WIRE -608 128 -608 -160
WIRE -496 128 -496 32
WIRE -496 128 -528 128
WIRE -352 128 -352 32
WIRE -352 128 -496 128
WIRE -320 128 -352 128
WIRE -192 128 -192 32
WIRE -192 128 -240 128
WIRE -32 128 -192 128
WIRE -768 144 -768 -160
WIRE 800 144 800 -64
WIRE 816 144 800 144
WIRE 1632 160 1616 160
WIRE -32 176 -48 176
WIRE 1168 208 1136 208
WIRE 1312 208 1168 208
WIRE 1344 208 1312 208
WIRE 1472 208 1424 208
WIRE 1632 208 1472 208
WIRE -496 224 -528 224
WIRE -352 224 -496 224
WIRE -320 224 -352 224
WIRE -192 224 -240 224
WIRE -32 224 -192 224
WIRE 496 224 496 160
WIRE 1984 256 1936 256
WIRE 320 272 272 272
WIRE 1168 288 1168 208
WIRE 1312 288 1312 208
WIRE 1472 288 1472 208
WIRE -496 304 -496 224
WIRE -352 304 -352 224
WIRE -192 304 -192 224
WIRE 1744 320 1744 304
WIRE 80 336 80 320
WIRE 800 384 800 144
WIRE 800 384 720 384
WIRE 864 384 800 384
WIRE 1168 384 1168 352
WIRE -496 400 -496 368
WIRE 720 432 720 384
WIRE 752 432 720 432
WIRE 864 432 864 384
WIRE 864 432 848 432
WIRE 1312 448 1312 368
WIRE 1472 448 1472 352
WIRE 1472 448 1312 448
WIRE 1936 448 1472 448
WIRE 1984 448 1984 256
WIRE 1984 448 1936 448
WIRE -352 464 -352 384
WIRE -192 464 -192 368
WIRE -192 464 -352 464
WIRE 272 464 -192 464
WIRE 320 464 320 272
WIRE 320 464 272 464
WIRE 352 464 320 464
WIRE 496 464 496 304
WIRE 496 464 432 464
WIRE 576 464 496 464
WIRE 752 464 656 464
WIRE 1056 464 1056 208
WIRE 1056 464 848 464
WIRE -768 496 -768 224
WIRE -608 496 -608 224
WIRE -608 496 -768 496
FLAG 80 336 0
FLAG 80 -80 0
FLAG -128 176 0
FLAG -496 400 0
FLAG -496 -64 0
FLAG 816 144 0
FLAG 272 464 P
FLAG 272 -144 N
FLAG 1744 320 0
FLAG 1744 -96 0
FLAG 1536 160 0
FLAG 1168 384 0
FLAG 1168 -80 0
FLAG 1936 -160 NO
FLAG 1936 448 PO
FLAG 848 -448 0
FLAG 848 -480 0
FLAG 752 -480 0
FLAG 752 -448 0
SYMBOL Opamps\\LTC6406 96 176 R0
SYMATTR InstName U1
SYMBOL voltage 80 16 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 3
SYMBOL voltage -32 176 R90
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 1.5
SYMBOL res -336 48 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R1
SYMATTR Value 300
SYMBOL res -512 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 300
SYMBOL res -512 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 300
SYMBOL res -336 400 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R4
SYMATTR Value 300
SYMBOL res -336 144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 300
SYMBOL res -336 240 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 300
SYMBOL cap -208 -32 R0
SYMATTR InstName C1
SYMATTR Value 6.8p
SYMBOL cap -208 304 R0
SYMATTR InstName C2
SYMATTR Value 6.8p
SYMBOL cap -512 304 R0
SYMATTR InstName C3
SYMATTR Value 30p
SYMBOL cap -512 -32 R0
SYMATTR InstName C4
SYMATTR Value 30p
SYMBOL voltage -768 128 R0
WINDOW 3 24 152 Left 2
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 0
SYMATTR Value2 AC 1m
SYMBOL res 448 -160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value {x}
SYMBOL res 448 448 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value {x}
SYMBOL res 480 -64 R0
SYMATTR InstName R9
SYMATTR Value 2.2
SYMBOL cap 480 96 R0
SYMATTR InstName C5
SYMATTR Value 20p
SYMBOL ind 480 208 R0
SYMATTR InstName L1
SYMATTR Value 100n
SYMBOL ltline 800 -464 M180
SYMATTR InstName O1
SYMATTR Value ltl
SYMBOL ltline 800 448 R0
SYMATTR InstName O2
SYMATTR Value ltl
SYMBOL res 672 -160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 1µ
SYMBOL res 672 448 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 1µ
SYMBOL Opamps\\LTC6406 1760 160 R0
SYMATTR InstName U2
SYMBOL voltage 1744 0 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 3
SYMBOL voltage 1632 160 R90
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V5
SYMATTR Value 1.5
SYMBOL res 1328 32 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R12
SYMATTR Value {50+x}
SYMBOL res 1152 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R13
SYMATTR Value 50
SYMBOL res 1152 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R14
SYMATTR Value 50
SYMBOL res 1328 384 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R15
SYMATTR Value {50+x}
SYMBOL res 1328 128 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R16
SYMATTR Value {50+x}
SYMBOL res 1328 224 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R17
SYMATTR Value {50+x}
SYMBOL cap 1456 -48 R0
SYMATTR InstName C6
SYMATTR Value 6.8p
SYMBOL cap 1456 288 R0
SYMATTR InstName C7
SYMATTR Value 6.8p
SYMBOL cap 1152 288 R0
SYMATTR InstName C8
SYMATTR Value 6p
SYMBOL cap 1152 -48 R0
SYMATTR InstName C9
SYMATTR Value 6p
SYMBOL ltline 800 -128 R0
SYMATTR InstName O3
SYMATTR Value ltl
TEXT -8 -344 Left 2 !.model ltl LTRA(len={length} R=100m L=250n C=100p)
TEXT -2 -174 Left 2 ;.ac dec 1k 1e6 3e9
TEXT -8 -256 Left 2 !.step param x list 33 50 250
TEXT -8 -224 Left 2 !.param length=1
TEXT -4 -194 Left 2 !.tran 10u