Version 4 SHEET 1 1380 1172 WIRE 1056 32 1056 0 WIRE -96 48 -144 48 WIRE 32 48 -16 48 WIRE 400 48 320 48 WIRE 528 48 480 48 WIRE 912 144 912 112 WIRE 1056 144 1056 112 WIRE 1056 144 912 144 WIRE -48 176 -48 144 WIRE -544 192 -640 192 WIRE -368 192 -432 192 WIRE -272 192 -368 192 WIRE -144 192 -144 48 WIRE -144 192 -192 192 WIRE -80 192 -144 192 WIRE 384 192 384 160 WIRE -640 208 -640 192 WIRE 32 208 32 48 WIRE 32 208 -16 208 WIRE 80 208 32 208 WIRE 192 208 144 208 WIRE 320 208 320 48 WIRE 320 208 272 208 WIRE 352 208 320 208 WIRE -80 224 -144 224 WIRE 528 224 528 48 WIRE 528 224 416 224 WIRE 544 224 528 224 WIRE 576 224 544 224 WIRE 656 224 640 224 WIRE 352 240 320 240 WIRE 1056 240 1056 144 WIRE -368 272 -368 256 WIRE -368 272 -432 272 WIRE -192 272 -368 272 WIRE -144 272 -144 224 WIRE -144 272 -192 272 WIRE -48 272 -48 240 WIRE 384 288 384 256 WIRE -640 304 -640 288 WIRE -544 304 -544 272 WIRE 320 320 320 240 WIRE 320 320 272 320 WIRE -192 336 -192 272 WIRE 832 352 816 352 WIRE 384 400 208 400 WIRE 544 400 544 224 WIRE 544 400 448 400 WIRE 832 416 832 352 WIRE 944 416 832 416 WIRE 1056 416 1056 320 WIRE 1056 416 944 416 WIRE 496 480 336 480 WIRE 656 480 656 224 WIRE 720 480 656 480 WIRE 832 480 832 416 WIRE 832 480 800 480 WIRE 944 480 944 416 WIRE 1056 496 1056 416 WIRE -96 560 -272 560 WIRE 432 592 432 544 WIRE 96 608 96 576 WIRE 208 608 208 400 WIRE 208 608 96 608 WIRE 496 608 496 480 WIRE 496 608 464 608 WIRE 336 624 336 480 WIRE 400 624 336 624 WIRE 944 624 944 544 WIRE 1056 624 1056 576 WIRE 656 640 656 480 WIRE 656 640 464 640 WIRE -160 688 -160 656 WIRE 208 688 208 608 WIRE 432 688 432 656 WIRE -96 704 -96 560 WIRE -96 704 -128 704 WIRE -416 720 -416 672 WIRE -336 720 -416 720 WIRE -272 720 -272 560 WIRE -192 720 -272 720 WIRE 336 720 336 624 WIRE -96 736 -128 736 WIRE 64 736 -96 736 WIRE 160 736 128 736 WIRE -416 752 -416 720 WIRE -160 784 -160 752 WIRE 208 800 208 768 WIRE -96 816 -96 736 WIRE 336 816 336 784 WIRE 448 816 336 816 WIRE 608 816 608 768 WIRE 608 816 512 816 WIRE 336 848 336 816 WIRE 608 848 608 816 WIRE -416 880 -416 832 WIRE -96 944 -96 896 WIRE 336 960 336 928 WIRE 608 960 608 928 FLAG 1056 0 0 FLAG -640 304 0 FLAG -48 144 V+ FLAG 912 112 V+ FLAG 1056 624 0 FLAG -544 304 0 FLAG 384 160 V+ FLAG 384 288 0 FLAG -48 272 0 FLAG -192 336 V/2 IOPIN -192 336 Out FLAG 272 320 V/2 IOPIN 272 320 Out FLAG -160 656 V+ FLAG -416 880 0 FLAG -160 784 0 FLAG -96 944 V/2 IOPIN -96 944 Out FLAG 432 544 V+ FLAG 432 688 0 FLAG 208 800 0 FLAG 336 960 0 FLAG 608 960 0 FLAG 816 352 V/2 IOPIN 816 352 Out FLAG 944 624 0 FLAG -416 672 Vheadphone FLAG 608 768 Vmeter FLAG 96 576 Vgain SYMBOL voltage 1056 128 M180 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 40 35 Left 0 WINDOW 3 40 75 Left 0 SYMATTR InstName V1 SYMATTR Value 9 SYMBOL res -176 176 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName Rs SYMATTR Value 628.3 SYMBOL voltage -640 192 R0 WINDOW 3 -5 -95 Left 0 WINDOW 123 -8 -53 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 -72 57 Left 0 SYMATTR Value SINE(0 10m 10k) SYMATTR Value2 AC 1 0 SYMATTR InstName V3 SYMBOL res 0 32 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R1 SYMATTR Value 470k SYMBOL opamp2 -48 144 R0 WINDOW 0 -36 114 Left 0 WINDOW 3 -39 167 Left 0 SYMATTR InstName U1 SYMATTR Value TL072 SYMBOL ind2 -560 176 R0 WINDOW 0 0 -7 Left 0 WINDOW 3 42 58 Left 0 SYMATTR InstName L1 SYMATTR Value 1m SYMATTR Type ind SYMATTR SpiceLine Rser=0.1 SYMBOL ind2 -416 288 R180 WINDOW 0 0 124 Left 0 WINDOW 3 -8 -7 Left 0 SYMATTR InstName L2 SYMATTR Value 1m SYMATTR Type ind SYMATTR SpiceLine Rser=7 SYMBOL opamp2 384 160 R0 WINDOW 0 -37 113 Left 0 WINDOW 3 -31 167 Left 0 SYMATTR InstName U2 SYMATTR Value TL072 SYMBOL cap 928 544 M180 WINDOW 0 24 64 Left 0 WINDOW 3 24 8 Left 0 SYMATTR InstName C3 SYMATTR Value 10µ SYMBOL res 496 32 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R6 SYMATTR Value 47k SYMBOL res 176 224 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R7 SYMATTR Value 10k SYMBOL cap 144 192 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C5 SYMATTR Value 1µ SYMBOL cap -384 192 R0 SYMATTR InstName C6 SYMATTR Value 2p SYMBOL opamp2 -160 656 M0 SYMATTR InstName U4 SYMATTR Value TL072 SYMBOL cap -336 704 M90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C4 SYMATTR Value 220µ SYMBOL res -400 736 M0 SYMATTR InstName R11 SYMATTR Value 32 SYMBOL cap 640 208 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C1 SYMATTR Value 10µ SYMBOL opamp2 432 560 M0 SYMATTR InstName U3 SYMATTR Value TL072 SYMBOL cap 320 720 R0 SYMATTR InstName C2 SYMATTR Value 220µ SYMBOL res 320 832 R0 SYMATTR InstName R4 SYMATTR Value 4.7k SYMBOL potentiometer 224 672 M0 WINDOW 3 -42 183 Left 0 SYMATTR Value Rtot=10K wiper=0.5 SYMATTR InstName U5 SYMBOL cap 128 720 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C7 SYMATTR Value 2.2µ SYMBOL res 592 832 R0 SYMATTR InstName R8 SYMATTR Value 1k SYMBOL res 704 464 M90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R9 SYMATTR Value 10k SYMBOL cap 448 384 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C8 SYMATTR Value 10µ SYMBOL diode 448 832 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL res 1072 224 M0 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL res -80 800 M0 SYMATTR InstName R14 SYMATTR Value 10k SYMBOL res 1040 480 R0 SYMATTR InstName R5 SYMATTR Value 10k TEXT 856 760 Left 0 !;tran 300u TEXT 856 904 Left 0 !.include TL072.301 TEXT -552 376 Left 0 !K L1 L2 0.9 TEXT 856 824 Left 0 !.ac oct 100 1 1Meg TEXT 680 896 Left 0 ;Meter TEXT -608 808 Left 0 ;Headphone TEXT -16 928 Left 0 !.include potentiometer.sub TEXT -264 128 Left 0 ;Rseries