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FLAG -7408 2448 -15V FLAG -7264 2448 +15V FLAG -5872 1760 -15V FLAG -6064 1360 -15V FLAG -6064 1488 +15V FLAG -5872 1616 +15V FLAG -3776 -400 0 FLAG -3504 -576 0 FLAG -3648 -576 0 FLAG -240 -784 -15V FLAG -240 -704 +15V FLAG -128 -432 0 FLAG -368 -448 0 FLAG -5952 1984 0 FLAG -6272 1984 0 FLAG -6416 1984 0 FLAG -7552 1760 -15V FLAG -7744 1360 -15V FLAG -7744 1488 +15V FLAG -7552 1616 +15V FLAG -7632 1984 0 FLAG -7952 1984 0 FLAG -8096 1984 0 FLAG -1312 -480 0 FLAG -1136 -480 0 FLAG 560 -928 -15V FLAG 560 -1024 +15V FLAG 464 -608 0 FLAG -224 -1456 -15V FLAG -224 -1376 +15V FLAG -112 -1104 0 FLAG -352 -1120 0 FLAG -7104 2704 0 FLAG -6256 -128 -15V FLAG -6256 -32 +15V FLAG -6320 288 0 FLAG -5680 -16 -15V FLAG -5680 -112 +15V FLAG -5088 0 -15V FLAG -5088 -96 +15V FLAG -5776 144 0 FLAG -5184 160 0 FLAG 944 -976 Output FLAG 976 -832 0 SYMBOL voltage -7104 2496 R0 WINDOW 123 24 124 Left 2 WINDOW 39 24 152 Left 2 SYMATTR Value2 AC 1 SYMATTR InstName V1 SYMATTR Value PULSE(0 4 0.0005 0 0 0.00005) SYMBOL voltage -7408 2496 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value -15 SYMBOL voltage -7264 2496 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value +15 SYMBOL res -6752 2304 R0 SYMATTR InstName R17 SYMATTR Value 50 SYMBOL res -5936 1424 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R1 SYMATTR Value 29 SYMBOL res -5936 1536 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R2 SYMATTR Value 10k SYMBOL res -5936 1648 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL res -5936 1856 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R4 SYMATTR Value 100 SYMBOL cap -5936 1728 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C1 SYMATTR Value 10n SYMBOL voltage -3776 -560 R0 WINDOW 123 24 124 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V6 SYMATTR Value PULSE(0 5 0 1n 1n 0.00002 0.00005) SYMBOL sw -3536 -1104 R270 SYMATTR InstName S4 SYMATTR Value mSW1 SYMBOL sw -3680 -768 R270 SYMATTR InstName S5 SYMATTR Value mSW1 SYMBOL res -560 -784 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R15 SYMATTR Value 100k SYMBOL res -432 -784 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R16 SYMATTR Value 30k SYMBOL cap -352 -896 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 1n SYMBOL cap -352 -704 M0 SYMATTR InstName C12 SYMATTR Value 1n SYMBOL res -144 -720 R0 SYMATTR InstName R18 SYMATTR Value 1k SYMBOL res -144 -576 R0 SYMATTR InstName R19 SYMATTR Value 1k SYMBOL res -6288 1440 R0 SYMATTR InstName R20 SYMATTR Value 470 SYMBOL cap -6432 1408 R0 SYMATTR InstName C4 SYMATTR Value 80µ SYMBOL Opamps\\OP27 -5872 1632 R0 SYMATTR InstName U1 SYMBOL Opamps\\OP27 -6064 1488 R180 SYMATTR InstName U2 SYMBOL res -7616 1424 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R21 SYMATTR Value 29 SYMBOL res -7616 1536 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R22 SYMATTR Value 10k SYMBOL res -7616 1648 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R23 SYMATTR Value 10k SYMBOL res -7616 1856 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R25 SYMATTR Value 100 SYMBOL cap -7616 1728 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C10 SYMATTR Value 10n SYMBOL res -7968 1440 R0 SYMATTR InstName R28 SYMATTR Value 470 SYMBOL cap -8112 1408 R0 SYMATTR InstName C13 SYMATTR Value 80µ SYMBOL Opamps\\OP27 -7552 1632 R0 SYMATTR InstName U9 SYMBOL Opamps\\OP27 -7744 1488 R180 SYMATTR InstName U11 SYMBOL cap -7008 1248 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C16 SYMATTR Value 10µ SYMBOL diode -6720 1776 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL res -1328 -656 R0 SYMATTR InstName R5 SYMATTR Value 1k SYMBOL res -1152 -656 R0 SYMATTR InstName R6 SYMATTR Value 1k SYMBOL Opamps\\OP27 -240 -688 M180 SYMATTR InstName U3 SYMBOL Opamps\\OP27 560 -1040 R0 SYMATTR InstName U4 SYMBOL res 448 -928 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R8 SYMATTR Value 10k SYMBOL res 448 -1056 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R9 SYMATTR Value 10k SYMBOL res 720 -1168 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R10 SYMATTR Value 10k SYMBOL res 480 -704 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R11 SYMATTR Value 10k SYMBOL res -544 -1456 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R12 SYMATTR Value 100k SYMBOL res -416 -1456 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R13 SYMATTR Value 30k SYMBOL cap -336 -1568 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C7 SYMATTR Value 1n SYMBOL cap -336 -1376 M0 SYMATTR InstName C9 SYMATTR Value 1n SYMBOL res -128 -1392 R0 SYMATTR InstName R14 SYMATTR Value 1k SYMBOL res -128 -1248 R0 SYMATTR InstName R27 SYMATTR Value 1k SYMBOL Opamps\\OP27 -224 -1360 M180 SYMATTR InstName U5 SYMBOL voltage -7104 2720 R180 WINDOW 0 24 96 Left 2 WINDOW 3 24 16 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 24 -12 Left 2 SYMATTR InstName V7 SYMATTR Value 2 SYMATTR SpiceLine Rser=0 SYMBOL res -6160 64 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R32 SYMATTR Value 100k SYMBOL res -6336 144 R0 SYMATTR InstName R33 SYMATTR Value 10k SYMBOL Opamps\\OP27 -6256 -16 M180 SYMATTR InstName U6 SYMBOL Opamps\\OP27 -5680 -128 R0 SYMATTR InstName U7 SYMBOL res -5584 -208 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R34 SYMATTR Value 10k SYMBOL Opamps\\OP27 -5088 -112 R0 SYMATTR InstName U10 SYMBOL res -4992 -192 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R35 SYMATTR Value 10k SYMBOL res -5840 -96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R38 SYMATTR Value 10k SYMBOL res -5232 -80 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R43 SYMATTR Value 10k SYMBOL cap -7008 1088 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value 3µ SYMBOL cap -7008 912 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C8 SYMATTR Value 1µ SYMBOL Misc\\jumper -6944 848 R0 WINDOW 0 3 35 Bottom 2 SYMATTR InstName X2 SYMBOL Misc\\jumper -6944 1024 R0 SYMATTR InstName X3 SYMBOL Misc\\jumper -6944 1168 R0 WINDOW 0 6 7 Bottom 2 SYMATTR InstName X4 SYMBOL voltage -5776 48 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V4 SYMATTR Value 1 SYMBOL voltage -5184 64 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V5 SYMATTR Value 2 SYMBOL res 960 -960 R0 SYMATTR InstName R7 SYMATTR Value 100k SYMBOL cap 48 -1424 R0 SYMATTR InstName C2 SYMATTR Value 10n SYMBOL cap 48 -752 R0 SYMATTR InstName C6 SYMATTR Value 10n TEXT -7504 16 Left 2 !;.ac oct 1000 10 100000 TEXT -3744 -392 Left 2 !.model mSW1 SW(Ron=1 Roff=1Meg Vt=4.9 Vh=-.1) TEXT -672 -1736 Left 2 ;The cut-off frequency of second order low pass filter is fc = 1 / 2À"(C1C2R3R4)\n \nThe gain of the above circuit is Amax = 1 + (R2/R1) TEXT -7512 -80 Left 7 ;Control: TEXT -7280 744 Left 7 ;Coupling TEXT -3848 -296 Left 5 ;Beam chopping TEXT -5584 96 Left 6 ;Offset TEXT -7496 80 Left 2 !.tran 25m TEXT -5680 184 Left 2 ;1 Volt left side and 2Volt right side TEXT -5656 216 Left 2 ;produce a symmetric output!!! LINE Normal -192 -1664 -192 -1664 2 LINE Normal -96 -1264 -192 -1664 2 LINE Normal -96 -1264 -96 -1264 2 LINE Normal 80 -1712 80 -1712 2 LINE Normal -416 -1488 80 -1712 2 LINE Normal -416 -1488 -416 -1488 2 LINE Normal -7536 -160 -7536 -160 2 LINE Normal -7536 -160 -7536 -160 2 RECTANGLE Normal -672 -1600 -672 -1600 2 RECTANGLE Normal -320 -1296 -672 -1600 2 RECTANGLE Normal -16 -1120 -160 -1392 2 RECTANGLE Normal 224 -1072 -720 -1776 2 RECTANGLE Normal -6992 144 -7536 -160 2 RECTANGLE Normal -7392 2288 -8192 1136 2 RECTANGLE Normal -5680 2288 -6480 1136 2 RECTANGLE Normal -6576 1376 -7360 640 2 RECTANGLE Normal -2960 -208 -3936 -1280 2 RECTANGLE Normal 1296 3024 -8496 -2288