Version 4 SHEET 1 1880 1252 WIRE 1408 -464 1392 -464 WIRE 1392 -384 1392 -464 WIRE 1472 -384 1472 -464 WIRE 1168 -368 1088 -368 WIRE 928 -288 912 -288 WIRE 1008 -288 928 -288 WIRE 1088 -288 1088 -368 WIRE 1152 -288 1088 -288 WIRE 1232 -288 1232 -368 WIRE 1312 -288 1232 -288 WIRE 1312 -272 1312 -288 WIRE 1360 -272 1312 -272 WIRE 1392 -272 1392 -384 WIRE 1472 -256 1472 -384 WIRE 1472 -256 1456 -256 WIRE 1360 -240 1360 -272 WIRE 1376 -240 1360 -240 WIRE 1392 -240 1376 -240 WIRE 416 -224 416 -336 WIRE 448 -224 416 -224 WIRE 464 -224 448 -224 WIRE 576 -208 576 -336 WIRE 576 -208 528 -208 WIRE 464 -192 416 -192 WIRE 832 -192 768 -192 WIRE 416 -176 416 -192 WIRE 720 -160 640 -160 WIRE 768 -160 768 -192 WIRE 432 -144 384 -144 WIRE 832 -128 832 -192 WIRE 944 -128 928 -128 WIRE 1088 -128 1088 -288 WIRE 1088 -128 1024 -128 WIRE 1120 -128 1088 -128 WIRE 1216 -128 1216 -160 WIRE 832 -112 832 -128 WIRE 928 -112 928 -128 WIRE 1360 -112 1312 -112 WIRE 1312 -96 1312 -112 WIRE 16 -80 0 -80 WIRE 112 -80 96 -80 WIRE 288 -80 288 -112 WIRE 0 -64 0 -80 WIRE 752 -64 720 -64 WIRE 768 -64 752 -64 WIRE 1376 -64 1376 -240 WIRE 1376 -64 1344 -64 WIRE 384 -48 384 -64 WIRE 752 -48 752 -64 WIRE 752 -32 752 -48 WIRE 448 -16 448 -224 WIRE 448 -16 416 -16 WIRE 576 0 576 -208 WIRE 896 0 576 0 WIRE 1072 0 976 0 WIRE 1120 0 1072 0 WIRE -256 32 -304 32 WIRE 912 32 752 32 WIRE 1216 32 1216 0 WIRE -32 48 -96 48 WIRE 144 48 48 48 WIRE 192 48 144 48 WIRE 1360 64 1360 -112 WIRE 1360 64 1344 64 WIRE 288 80 288 48 WIRE 912 80 912 32 WIRE 960 80 912 80 WIRE 960 112 960 80 WIRE 960 112 880 112 WIRE 432 128 432 -144 WIRE -256 144 -256 112 WIRE -256 144 -368 144 WIRE 640 144 640 -160 WIRE 816 144 816 112 WIRE 816 144 640 144 WIRE -256 160 -256 144 WIRE 656 160 656 -112 WIRE 800 160 656 160 WIRE 336 176 304 176 WIRE 368 176 336 176 WIRE 816 176 816 144 WIRE 864 176 816 176 WIRE 944 192 928 192 WIRE 960 192 960 112 WIRE 960 192 944 192 WIRE 1344 192 1344 144 WIRE 1344 192 1248 192 WIRE 800 208 800 160 WIRE 800 208 784 208 WIRE 864 208 848 208 WIRE -368 224 -368 144 WIRE -352 224 -368 224 WIRE -256 240 -288 240 WIRE 80 240 -256 240 WIRE 208 240 160 240 WIRE 336 240 336 176 WIRE 624 240 480 240 WIRE 848 240 848 208 WIRE -480 256 -720 256 WIRE -352 256 -400 256 WIRE 304 256 304 176 WIRE 304 256 272 256 WIRE 624 256 624 240 WIRE 720 256 720 208 WIRE 720 256 704 256 WIRE 800 256 800 208 WIRE 1248 256 1248 192 WIRE 208 272 192 272 WIRE 704 272 704 256 WIRE 704 272 656 272 WIRE 192 304 192 272 WIRE 480 304 480 240 WIRE 528 304 480 304 WIRE 1120 304 976 304 WIRE 1184 304 1120 304 WIRE 624 320 624 256 WIRE 624 320 592 320 WIRE -400 336 -400 256 WIRE 528 336 480 336 WIRE 656 336 656 272 WIRE 704 336 656 336 WIRE 160 352 160 240 WIRE 336 352 336 304 WIRE 336 352 160 352 WIRE 432 352 432 224 WIRE 432 352 336 352 WIRE 800 352 800 256 WIRE 800 352 768 352 WIRE 704 368 688 368 WIRE 976 368 976 304 WIRE 1024 368 976 368 WIRE 1120 384 1120 304 WIRE 1120 384 1088 384 WIRE 944 400 944 192 WIRE 1024 400 944 400 WIRE 1392 400 1344 400 WIRE 1504 400 1456 400 WIRE 688 416 688 368 WIRE -720 432 -720 256 WIRE -480 432 -720 432 WIRE 480 432 480 336 WIRE 480 432 464 432 WIRE 528 432 480 432 WIRE 1248 480 1248 352 WIRE 1248 480 976 480 WIRE 1344 480 1344 400 WIRE 1504 480 1504 400 WIRE 1504 480 1424 480 WIRE -720 496 -720 432 WIRE 608 512 608 432 WIRE 624 512 608 512 WIRE 1344 544 1344 480 WIRE 1200 560 1168 560 WIRE 1344 592 1344 544 WIRE 1392 592 1344 592 WIRE 944 608 944 400 WIRE 944 608 864 608 WIRE 1024 608 1024 560 WIRE 1056 608 1024 608 WIRE 1504 608 1504 480 WIRE 1504 608 1456 608 WIRE 1392 624 1376 624 WIRE 416 640 416 528 WIRE 448 640 416 640 WIRE 464 640 448 640 WIRE 1104 640 1104 560 WIRE 1120 640 1104 640 WIRE 1200 640 1200 560 WIRE 1376 640 1376 624 WIRE 1376 640 1200 640 WIRE 576 656 576 528 WIRE 576 656 528 656 WIRE 1056 656 1056 608 WIRE 1056 656 1024 656 WIRE -352 672 -368 672 WIRE -256 672 -272 672 WIRE 464 672 416 672 WIRE 1360 672 1312 672 WIRE 416 688 416 672 WIRE 1056 704 1056 656 WIRE 432 720 384 720 WIRE 944 736 928 736 WIRE 1104 736 1104 640 WIRE 1104 736 1024 736 WIRE 1120 736 1104 736 WIRE 1216 736 1216 704 WIRE -480 752 -480 432 WIRE -384 752 -400 752 WIRE 928 752 928 736 WIRE 1312 768 1312 752 WIRE 16 784 0 784 WIRE 112 784 96 784 WIRE 288 784 288 752 WIRE -384 800 -384 752 WIRE -368 800 -368 672 WIRE -368 800 -384 800 WIRE -352 800 -368 800 WIRE 0 800 0 784 WIRE 1376 800 1376 640 WIRE 1376 800 1344 800 WIRE -256 816 -256 672 WIRE -256 816 -288 816 WIRE -208 816 -256 816 WIRE 384 816 384 800 WIRE -368 832 -400 832 WIRE -352 832 -368 832 WIRE 448 848 448 640 WIRE 448 848 416 848 WIRE 576 864 576 656 WIRE 896 864 576 864 WIRE 1072 864 976 864 WIRE 1120 864 1072 864 WIRE -368 880 -368 832 WIRE 1216 896 1216 864 WIRE -32 912 -96 912 WIRE 144 912 48 912 WIRE 192 912 144 912 WIRE 1360 928 1360 672 WIRE 1456 928 1360 928 WIRE 288 944 288 912 WIRE 1360 944 1360 928 WIRE 432 992 432 720 WIRE 1296 992 1232 992 WIRE 1232 1008 1232 992 WIRE 1232 1008 1088 1008 WIRE 336 1040 304 1040 WIRE 368 1040 336 1040 WIRE 864 1040 864 608 WIRE 992 1040 864 1040 WIRE 1088 1056 1088 1008 WIRE 1136 1056 1088 1056 WIRE 1232 1072 1232 1008 WIRE 1232 1072 1200 1072 WIRE 992 1088 992 1040 WIRE 1136 1088 992 1088 WIRE -208 1104 -208 816 WIRE 80 1104 -208 1104 WIRE 208 1104 160 1104 WIRE 336 1104 336 1040 WIRE 304 1120 304 1040 WIRE 304 1120 272 1120 WIRE 208 1136 192 1136 WIRE 192 1168 192 1136 WIRE 1360 1168 1360 1040 WIRE 160 1216 160 1104 WIRE 336 1216 336 1168 WIRE 336 1216 160 1216 WIRE 432 1216 432 1088 WIRE 432 1216 336 1216 FLAG -112 -368 0 FLAG -112 -448 +12V FLAG -224 -448 -12V FLAG -224 -368 0 FLAG 0 800 0 FLAG 112 848 +12V FLAG 288 752 +12V FLAG 496 624 +12V FLAG 240 1088 +12V FLAG 288 944 -12V FLAG 496 688 -12V FLAG 240 1152 -12V FLAG -96 992 0 FLAG 144 992 0 FLAG 192 1168 0 FLAG 416 688 0 FLAG 0 -64 0 FLAG 112 -16 +12V FLAG 288 -112 +12V FLAG 496 -240 +12V FLAG 240 224 +12V FLAG 288 80 -12V FLAG 496 -176 -12V FLAG 240 288 -12V FLAG -96 128 0 FLAG 144 128 0 FLAG 192 304 0 FLAG -720 576 0 FLAG 416 -176 0 FLAG -320 208 +12V FLAG -320 272 -12V FLAG -304 32 0 FLAG -224 -96 0 FLAG -224 -176 5V FLAG -480 336 5V FLAG -320 784 +12V FLAG -320 848 -12V FLAG -368 960 0 FLAG -480 832 5V FLAG 928 752 0 FLAG 1216 704 +12V FLAG 1424 576 +12V FLAG 1168 1040 +12V FLAG 1216 896 -12V FLAG 1424 640 -12V FLAG 1168 1104 -12V FLAG 1072 944 0 FLAG 928 -112 0 FLAG 1216 -160 +12V FLAG 1056 352 +12V FLAG 1216 32 -12V FLAG 1424 -224 -12V FLAG 1056 416 -12V FLAG 1072 80 0 FLAG 624 592 0 FLAG 1168 192 -12V FLAG 560 288 +12V FLAG 560 352 -12V FLAG 736 320 +12V FLAG 736 384 -12V FLAG 896 160 +12V FLAG 896 224 -12V FLAG 832 -128 0 FLAG 720 -240 +12V FLAG 848 240 0 FLAG 688 416 0 FLAG 976 480 0 FLAG 1424 -288 +12V FLAG 1312 -384 0 FLAG 832 -288 +12V FLAG 384 432 +12V FLAG 928 -208 -12V FLAG 1360 1168 0 FLAG 1536 928 -12V FLAG 1264 544 0 FLAG 944 656 +12V FLAG 1056 784 -12V SYMBOL voltage -112 -464 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL voltage -224 -464 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value -12 SYMBOL LM13700 256 768 R0 SYMATTR InstName U4 SYMBOL res 208 768 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 -16 15 VTop 2 SYMATTR InstName R10 SYMATTR Value 22 SYMBOL res 112 768 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R11 SYMATTR Value 470 SYMBOL res 208 832 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R12 SYMATTR Value 12k SYMBOL voltage -96 896 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V5 SYMATTR Value SINE(0 5 400) SYMBOL res 64 896 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R13 SYMATTR Value 21k SYMBOL res 160 1008 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R14 SYMATTR Value 510 SYMBOL TL072 496 592 R0 SYMATTR InstName U5 SYMBOL TL072 240 1056 R0 SYMATTR InstName U6 SYMBOL res 176 1088 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R15 SYMATTR Value 6k8 SYMBOL res 592 512 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R16 SYMATTR Value 560 SYMBOL res 512 512 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R17 SYMATTR Value 15k SYMBOL res 368 704 R0 WINDOW 0 42 52 Left 2 SYMATTR InstName R18 SYMATTR Value 7k2 SYMBOL pnp 368 992 R0 SYMATTR InstName Q2 SYMATTR Value 2N3906 SYMBOL diode 320 1104 R0 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMBOL LM13700 256 -96 R0 SYMATTR InstName U1 SYMBOL res 208 -96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 -19 21 VTop 2 SYMATTR InstName R1 SYMATTR Value 22 SYMBOL res 112 -96 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 470 SYMBOL res 208 -32 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 12k SYMBOL voltage -96 32 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V3 SYMATTR Value SINE(0 5 200) SYMBOL res 64 32 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 21k SYMBOL res 160 144 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R5 SYMATTR Value 510 SYMBOL TL072 496 -272 R0 SYMATTR InstName U2 SYMBOL TL072 240 192 R0 SYMATTR InstName U3 SYMBOL res 176 224 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 6k8 SYMBOL res 592 -352 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 560 SYMBOL res 512 -352 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R8 SYMATTR Value 15k SYMBOL res 368 -160 R0 WINDOW 0 42 52 Left 2 SYMATTR InstName R9 SYMATTR Value 7k2 SYMBOL pnp 368 128 R0 SYMATTR InstName Q1 SYMATTR Value 2N3906 SYMBOL diode 320 240 R0 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL voltage -720 480 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V4 SYMATTR Value PULSE(-5 5 0 .5 .5 0 1) SYMBOL TL072 -320 176 R0 SYMATTR InstName U7 SYMBOL res -384 240 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R19 SYMATTR Value 100k SYMBOL res -384 320 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R20 SYMATTR Value 100k SYMBOL res -272 144 R0 SYMATTR InstName R21 SYMATTR Value 200k SYMBOL res -272 16 R0 SYMATTR InstName R22 SYMATTR Value 200k SYMBOL voltage -224 -192 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V6 SYMATTR Value 5V SYMBOL TL072 -320 752 R0 SYMATTR InstName U8 SYMBOL res -384 736 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R23 SYMATTR Value 100k SYMBOL res -384 816 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R24 SYMATTR Value 100k SYMBOL res -256 656 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R25 SYMATTR Value 100k SYMBOL res -384 864 R0 SYMATTR InstName R26 SYMATTR Value 100k SYMBOL LM13700 1184 720 R0 SYMATTR InstName U9 SYMBOL res 1216 624 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 -16 15 VTop 2 SYMATTR InstName R27 SYMATTR Value 47k SYMBOL res 1040 720 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R28 SYMATTR Value 680 SYMBOL res 992 848 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R30 SYMATTR Value 100k SYMBOL res 1088 960 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R31 SYMATTR Value 680 SYMBOL TL072 1424 544 R0 SYMATTR InstName U10 SYMBOL TL072 1168 1008 R0 SYMATTR InstName U11 SYMBOL res 1360 528 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R33 SYMATTR Value 68k SYMBOL res 1440 464 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R34 SYMATTR Value 100k SYMBOL res 1296 656 R0 WINDOW 0 42 52 Left 2 SYMATTR InstName R35 SYMATTR Value 15k SYMBOL pnp 1296 944 R0 SYMATTR InstName Q3 SYMATTR Value 2N3906 SYMBOL cap 1456 384 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value 22p SYMBOL LM13700 1184 -144 R0 SYMATTR InstName U12 SYMBOL res 1040 -144 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R37 SYMATTR Value 680 SYMBOL res 992 -16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R39 SYMATTR Value 100k SYMBOL res 1088 96 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R40 SYMATTR Value 680 SYMBOL TL072 1424 -320 R0 SYMATTR InstName U13 SYMBOL TL072 1056 320 R0 SYMATTR InstName U14 SYMBOL pnp 1184 256 R0 SYMATTR InstName Q4 SYMATTR Value 2N3906 SYMBOL voltage 624 496 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V8 SYMATTR Value PULSE(0 10 0 .25 .25 0 .5) SYMBOL res 1264 176 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R38 SYMATTR Value 680k SYMBOL res 1328 48 R0 SYMATTR InstName R41 SYMATTR Value 15k SYMBOL TL072 560 256 R0 SYMATTR InstName U15 SYMBOL TL072 736 288 R0 SYMATTR InstName U16 SYMBOL TL072 896 128 R0 SYMATTR InstName U17 SYMBOL res 720 240 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R42 SYMATTR Value 1Meg SYMBOL res 816 240 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R43 SYMATTR Value 10k SYMBOL cap 784 192 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 100p SYMBOL npn 656 -160 R0 SYMATTR InstName Q5 SYMATTR Value BC847C SYMBOL npn 832 -160 M0 SYMATTR InstName Q6 SYMATTR Value BC847C SYMBOL res 704 -256 R0 SYMATTR InstName R44 SYMATTR Value 10Meg SYMBOL res 736 -64 R0 SYMATTR InstName R45 SYMATTR Value 1k5 SYMBOL cap 880 96 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value 100p SYMBOL res 1488 -400 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R46 SYMATTR Value 100k SYMBOL res 1408 -400 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R47 SYMATTR Value 68k SYMBOL res 1104 -304 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R36 SYMATTR Value 1Meg SYMBOL res 928 -304 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R48 SYMATTR Value 50k SYMBOL res 1248 -304 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R49 SYMATTR Value 47k SYMBOL cap 1232 -384 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value 100p SYMBOL res 624 416 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R50 SYMATTR Value 1k SYMBOL res 480 416 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R51 SYMATTR Value 1Meg SYMBOL res 912 -304 R0 SYMATTR InstName R52 SYMATTR Value 50k SYMBOL cap 1472 -480 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 22p SYMBOL res 1552 912 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R32 SYMATTR Value 680k SYMBOL cap 1168 544 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value 100p SYMBOL res 1040 640 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R29 SYMATTR Value 50k SYMBOL res 1040 688 R0 SYMATTR InstName R53 SYMATTR Value 50k SYMBOL res 1120 544 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R54 SYMATTR Value 1Meg TEXT -146 -584 Left 2 !.tran 1 TEXT -576 -504 Left 2 !.include lm13700.sub