Version 4 SHEET 1 2956 688 WIRE 144 -912 144 -960 WIRE 688 -912 688 -960 WIRE 1248 -912 1248 -960 WIRE -128 -896 -128 -960 WIRE 512 -896 512 -960 WIRE 1088 -896 1088 -960 WIRE -160 -880 -192 -880 WIRE 480 -880 464 -880 WIRE 1056 -880 1008 -880 WIRE 80 -864 -96 -864 WIRE 624 -864 544 -864 WIRE 1184 -864 1120 -864 WIRE -160 -848 -224 -848 WIRE 480 -848 432 -848 WIRE 1056 -848 976 -848 WIRE 512 -800 512 -832 WIRE 144 -784 144 -816 WIRE 144 -784 16 -784 WIRE 208 -784 144 -784 WIRE 336 -784 272 -784 WIRE 688 -784 688 -816 WIRE 688 -784 608 -784 WIRE 752 -784 688 -784 WIRE 880 -784 816 -784 WIRE 1088 -784 1088 -832 WIRE 1248 -784 1248 -816 WIRE 1248 -784 1168 -784 WIRE 1328 -784 1248 -784 WIRE 1440 -784 1392 -784 WIRE -128 -768 -128 -832 WIRE 880 -768 880 -784 WIRE 144 -752 144 -784 WIRE 336 -752 336 -784 WIRE 688 -752 688 -784 WIRE 1248 -752 1248 -784 WIRE 1440 -752 1440 -784 WIRE -192 -704 -192 -880 WIRE 16 -704 16 -784 WIRE 16 -704 -192 -704 WIRE 464 -704 464 -880 WIRE 608 -704 608 -784 WIRE 608 -704 464 -704 WIRE 1008 -704 1008 -880 WIRE 1168 -704 1168 -784 WIRE 1168 -704 1008 -704 WIRE 880 -656 880 -688 WIRE 144 -640 144 -672 WIRE 336 -640 336 -672 WIRE 688 -640 688 -672 WIRE 1248 -640 1248 -672 WIRE 1440 -640 1440 -672 WIRE 336 -576 208 -576 WIRE 432 -576 432 -848 WIRE 432 -576 400 -576 WIRE 592 -576 432 -576 WIRE -224 -560 -224 -848 WIRE 0 -560 -224 -560 WIRE 864 -560 736 -560 WIRE 976 -560 976 -848 WIRE 976 -560 944 -560 WIRE 1120 -560 976 -560 WIRE -1088 -496 -1088 -944 WIRE -432 -496 -768 -496 WIRE -144 -448 -144 -480 WIRE -176 -432 -224 -432 WIRE 432 -432 432 -480 WIRE 0 -416 0 -560 WIRE 0 -416 -112 -416 WIRE 96 -416 0 -416 WIRE 208 -416 208 -576 WIRE 208 -416 176 -416 WIRE 224 -416 208 -416 WIRE 336 -416 304 -416 WIRE 400 -416 368 -416 WIRE 960 -416 960 -480 WIRE -768 -400 -768 -496 WIRE -720 -400 -768 -400 WIRE -576 -400 -640 -400 WIRE -432 -400 -432 -496 WIRE -432 -400 -496 -400 WIRE -384 -400 -432 -400 WIRE -176 -400 -384 -400 WIRE 592 -400 592 -576 WIRE 592 -400 464 -400 WIRE 624 -400 592 -400 WIRE 736 -400 736 -560 WIRE 736 -400 688 -400 WIRE 768 -400 736 -400 WIRE 864 -400 832 -400 WIRE 928 -400 896 -400 WIRE 0 -384 0 -416 WIRE 96 -384 0 -384 WIRE 336 -384 336 -416 WIRE 400 -384 336 -384 WIRE 1120 -384 1120 -560 WIRE 1120 -384 992 -384 WIRE 864 -368 864 -400 WIRE 928 -368 864 -368 WIRE 0 -352 0 -384 WIRE -1088 -336 -1088 -496 WIRE -144 -336 -144 -384 WIRE 96 -320 96 -384 WIRE 336 -304 336 -384 WIRE 432 -304 432 -368 WIRE 864 -304 864 -368 WIRE 960 -288 960 -352 WIRE -384 -272 -384 -400 WIRE 0 -256 0 -272 WIRE 96 -256 0 -256 WIRE -224 -224 -224 -432 WIRE 0 -224 0 -256 WIRE 0 -224 -224 -224 WIRE 368 -224 368 -416 WIRE 592 -224 592 -400 WIRE 592 -224 368 -224 WIRE -1088 -208 -1088 -256 WIRE -1088 -208 -1216 -208 WIRE 896 -208 896 -400 WIRE 1120 -208 1120 -384 WIRE 1120 -208 896 -208 WIRE -1216 -192 -1216 -208 WIRE 0 -192 0 -224 WIRE -1088 -128 -1088 -208 WIRE -384 -128 -384 -208 WIRE 336 -64 336 -240 WIRE 864 -64 864 -224 WIRE -768 80 -768 -400 WIRE -1088 128 -1088 -48 WIRE 0 176 0 -112 WIRE -768 208 -768 160 FLAG -768 208 0 FLAG 336 -64 0 FLAG 336 -640 0 FLAG 880 -656 0 FLAG 1440 -640 0 FLAG -1216 -192 0 FLAG -1088 -496 +10V FLAG -128 -960 +10V FLAG 144 -960 +10V FLAG 512 -960 +10V FLAG 688 -960 +10V FLAG 1088 -960 +10V FLAG 1248 -960 +10V FLAG 960 -480 +10V FLAG 432 -480 +10V FLAG -144 -480 +10V FLAG -1088 128 -10V FLAG -144 -336 -10V FLAG 432 -304 -10V FLAG 960 -288 -10V FLAG 864 -64 0 FLAG 0 176 0 FLAG -128 -768 -10V FLAG 512 -800 -10V FLAG 1088 -784 -10V FLAG 1248 -640 -10V FLAG 688 -640 -10V FLAG 144 -640 -10V FLAG -384 -128 0 SYMBOL voltage -768 64 R0 WINDOW 123 24 44 Left 2 WINDOW 3 24 100 Left 2 SYMATTR Value2 AC 0.00001V 0 SYMATTR Value SINE(0 0.1V 30000) SYMATTR SpiceLine Rser=0 SYMATTR InstName V4 SYMBOL res -16 -208 R0 SYMATTR InstName R3 SYMATTR Value 1k SYMBOL res -16 -368 R0 SYMATTR InstName R1 SYMATTR Value 80k SYMBOL res 192 -432 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 16k SYMBOL res 320 -432 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 16k SYMBOL cap 400 -592 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value 100p SYMBOL cap 352 -240 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C3 SYMATTR Value 100p SYMBOL res 960 -576 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 16k SYMBOL res 880 -208 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R7 SYMATTR Value 16k SYMBOL cap 688 -416 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value 1n SYMBOL cap 832 -416 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 1n SYMBOL npn 80 -912 R0 SYMATTR InstName Q1 SYMATTR Value BC847C SYMBOL npn 624 -912 R0 SYMATTR InstName Q2 SYMATTR Value BC847C SYMBOL npn 1184 -912 R0 SYMATTR InstName Q3 SYMATTR Value BC847C SYMBOL res 128 -768 R0 SYMATTR InstName R2 SYMATTR Value 100R SYMBOL res 672 -768 R0 SYMATTR InstName R10 SYMATTR Value 100R SYMBOL res 1232 -768 R0 SYMATTR InstName R11 SYMATTR Value 100R SYMBOL cap 272 -800 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 100µ SYMBOL cap 816 -800 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value 100µ SYMBOL cap 1392 -800 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C7 SYMATTR Value 100µ SYMBOL res 320 -768 R0 SYMATTR InstName R12 SYMATTR Value 50R SYMBOL res 864 -784 R0 SYMATTR InstName R13 SYMATTR Value 50R SYMBOL res 1424 -768 R0 SYMATTR InstName R14 SYMATTR Value 50R SYMBOL voltage -1088 -352 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 10V SYMBOL Opamps\\opamp2 -144 -480 R0 SYMATTR InstName U1 SYMATTR Value op37 SYMBOL Opamps\\opamp2 432 -464 R0 SYMATTR InstName U2 SYMATTR Value op37 SYMBOL Opamps\\opamp2 960 -448 R0 SYMATTR InstName U3 SYMATTR Value op37 SYMBOL Opamps\\opamp2 -128 -928 R0 SYMATTR InstName U4 SYMATTR Value op37 SYMBOL Opamps\\opamp2 512 -928 R0 SYMATTR InstName U5 SYMATTR Value op37 SYMBOL Opamps\\opamp2 1088 -928 R0 SYMATTR InstName U6 SYMATTR Value op37 SYMBOL voltage -1088 -144 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value 10V SYMBOL res -624 -416 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R8 SYMATTR Value 11R SYMBOL ind -480 -416 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName L1 SYMATTR Value 3.3µ SYMBOL cap -400 -272 R0 SYMATTR InstName C8 SYMATTR Value 100n SYMBOL cap 80 -320 R0 SYMATTR InstName C9 SYMATTR Value 10p TEXT 1144 368 Left 2 !;noise V(AinDiff) V4 dec 100 1 1Meg TEXT 1144 336 Left 2 !;tran 0 1s 0 0.01 startup TEXT 1144 296 Left 2 !.ac dec 501 1000Hz 3000k TEXT 1152 416 Left 2 !.include op37.lib TEXT 1128 56 Left 2 !.options cshunt=1e-15 TEXT 1136 104 Left 2 !.options reltol=0.003 TEXT 1152 168 Left 2 !.options abstol=1e-10 TEXT 1144 224 Left 2 !.options gmin=1e-10