Version 4 SHEET 1 2592 1136 WIRE 32 -448 -128 -448 WIRE 192 -448 32 -448 WIRE 336 -448 192 -448 WIRE 544 -448 336 -448 WIRE 576 -448 544 -448 WIRE 816 -448 656 -448 WIRE 912 -448 816 -448 WIRE 1136 -448 912 -448 WIRE 1488 -448 1136 -448 WIRE 32 -432 32 -448 WIRE 336 -432 336 -448 WIRE 544 -416 544 -448 WIRE 32 -304 32 -352 WIRE 128 -304 32 -304 WIRE 448 -304 128 -304 WIRE 1488 -304 1488 -448 WIRE 32 -272 32 -304 WIRE 544 -256 544 -336 WIRE 544 -256 512 -256 WIRE 128 -176 128 -304 WIRE 816 -176 816 -448 WIRE 336 -128 336 -368 WIRE 336 -128 304 -128 WIRE 352 -128 336 -128 WIRE 448 -128 448 -208 WIRE 448 -128 416 -128 WIRE 528 -128 448 -128 WIRE 624 -128 528 -128 WIRE 720 -128 624 -128 WIRE 752 -128 720 -128 WIRE 448 -112 448 -128 WIRE 912 -112 912 -448 WIRE 816 -64 816 -80 WIRE 848 -64 816 -64 WIRE 1136 -48 1136 -448 WIRE 336 -16 336 -128 WIRE 448 -16 448 -32 WIRE 448 -16 336 -16 WIRE 32 0 32 -192 WIRE 128 0 128 -112 WIRE 128 0 32 0 WIRE 912 0 912 -16 WIRE 992 0 912 0 WIRE 624 16 624 -128 WIRE 32 48 32 0 WIRE 192 48 192 -448 WIRE -128 64 -128 -448 WIRE -512 80 -544 80 WIRE -400 80 -432 80 WIRE -384 80 -400 80 WIRE -288 80 -304 80 WIRE -192 80 -288 80 WIRE -160 80 -192 80 WIRE 1136 80 1136 48 WIRE -32 96 -96 96 WIRE 112 96 -32 96 WIRE 128 96 112 96 WIRE -160 112 -224 112 WIRE -288 128 -288 80 WIRE -400 176 -400 80 WIRE -192 176 -192 80 WIRE 224 176 -192 176 WIRE 272 176 224 176 WIRE 416 176 352 176 WIRE 1136 176 1136 160 WIRE 1136 176 416 176 WIRE 1232 176 1136 176 WIRE 1344 176 1344 160 WIRE 1344 176 1312 176 WIRE 1376 176 1344 176 WIRE 1488 176 1488 -224 WIRE 1488 176 1456 176 WIRE 1520 176 1488 176 WIRE -544 192 -544 80 WIRE 1136 192 1136 176 WIRE -288 208 -288 192 WIRE 528 224 528 -128 WIRE 720 224 720 -128 WIRE 816 240 816 -64 WIRE 912 240 912 0 WIRE 224 256 224 176 WIRE 240 256 224 256 WIRE 336 256 320 256 WIRE 416 256 416 176 WIRE 416 256 400 256 WIRE 624 272 624 96 WIRE 624 272 592 272 WIRE 1136 288 1136 272 WIRE 912 336 912 320 WIRE 992 336 912 336 WIRE 448 352 448 -16 WIRE 624 352 624 272 WIRE 912 352 912 336 WIRE -544 368 -544 272 WIRE -400 368 -400 240 WIRE -400 368 -544 368 WIRE -288 368 -288 288 WIRE -288 368 -400 368 WIRE -224 368 -224 112 WIRE -224 368 -288 368 WIRE -208 368 -224 368 WIRE -128 368 -128 128 WIRE -128 368 -144 368 WIRE -400 384 -400 368 WIRE 816 400 816 320 WIRE 848 400 816 400 WIRE 192 416 192 144 WIRE 272 416 192 416 WIRE 816 416 816 400 WIRE 272 448 272 416 WIRE 448 464 448 432 WIRE 448 464 416 464 WIRE 528 464 528 320 WIRE 528 464 448 464 WIRE 624 464 624 432 WIRE 624 464 528 464 WIRE 720 464 720 288 WIRE 720 464 624 464 WIRE 752 464 720 464 WIRE 1488 512 1488 176 WIRE 192 528 192 416 WIRE 448 544 448 464 WIRE 544 592 512 592 WIRE 192 640 192 608 WIRE 272 640 272 512 WIRE 272 640 192 640 WIRE 416 640 272 640 WIRE 448 640 416 640 WIRE 192 672 192 640 WIRE 544 672 544 592 WIRE -128 768 -128 368 WIRE 32 768 32 144 WIRE 32 768 -128 768 WIRE 192 768 192 752 WIRE 192 768 32 768 WIRE 544 768 544 752 WIRE 544 768 192 768 WIRE 624 768 544 768 WIRE 816 768 816 512 WIRE 816 768 704 768 WIRE 912 768 912 448 WIRE 912 768 816 768 WIRE 1136 768 1136 384 WIRE 1136 768 912 768 WIRE 1488 768 1488 592 WIRE 1488 768 1136 768 FLAG 1520 176 0 FLAG -400 384 0 FLAG 304 -128 0 FLAG 1344 160 2 IOPIN 1344 160 Out FLAG 112 96 1 FLAG 416 464 3 FLAG 416 640 4 SYMBOL npn 128 48 R0 WINDOW 0 78 9 Left 2 WINDOW 3 32 47 Left 2 SYMATTR InstName VT1 SYMATTR Value 2N5089_Cordell SYMBOL npn 512 544 M0 WINDOW 0 76 14 Left 2 WINDOW 3 34 49 Left 2 SYMATTR InstName VT3 SYMATTR Value 2N5089_Cordell SYMBOL npn 752 -176 R0 WINDOW 0 79 -17 Left 2 WINDOW 3 69 18 Left 2 SYMATTR InstName VT5 SYMATTR Value 2N2369 SYMBOL npn 848 -112 R0 WINDOW 0 82 16 Left 2 WINDOW 3 61 50 Left 2 SYMATTR InstName VT7 SYMATTR Value 2N2222 SYMBOL res 176 512 R0 WINDOW 3 42 76 Left 2 WINDOW 0 46 40 Left 2 SYMATTR Value 910 SYMATTR InstName R8 SYMBOL res 800 224 R0 WINDOW 0 44 37 Left 2 WINDOW 3 44 76 Left 2 SYMATTR InstName R15 SYMATTR Value 220 SYMBOL res 896 224 R0 WINDOW 0 46 38 Left 2 WINDOW 3 51 76 Left 2 SYMATTR InstName R16 SYMATTR Value 82 SYMBOL pnp 512 -208 R180 WINDOW 0 66 77 Left 2 WINDOW 3 28 45 Left 2 SYMATTR InstName VT2 SYMATTR Value 2N5087_Cordell SYMBOL res 16 -448 R0 WINDOW 0 -38 38 Left 2 WINDOW 3 -40 74 Left 2 SYMATTR InstName R9 SYMATTR Value 120 SYMBOL res 368 160 R90 WINDOW 0 -2 87 VBottom 2 WINDOW 3 -32 37 VTop 2 SYMATTR InstName R6 SYMATTR Value 33k SYMBOL voltage -544 176 R0 WINDOW 3 -235 47 Left 2 WINDOW 123 -124 9 Left 2 WINDOW 39 -170 86 Left 2 WINDOW 0 15 10 Left 2 SYMATTR Value SINE(0 1.25 20k) SYMATTR Value2 AC 1 1 SYMATTR InstName V1 SYMBOL voltage 1488 -320 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 0 47 81 Left 2 WINDOW 3 47 123 Left 2 WINDOW -1 49 81 Left 2 WINDOW 1 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 15 SYMATTR Type "" SYMATTR Prefix "" SYMATTR Description "" SYMBOL voltage 1488 496 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 0 45 27 Left 2 WINDOW 3 50 64 Left 2 SYMATTR InstName V3 SYMATTR Value 15 SYMBOL cap 288 448 M0 WINDOW 0 47 1 Left 2 WINDOW 3 48 38 Left 2 SYMATTR InstName C8 SYMATTR Value 47p SYMBOL cap 416 -144 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C12 SYMATTR Value 56p SYMBOL cap 400 240 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value 47p SYMBOL res 336 240 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 31 53 VTop 2 SYMATTR InstName R7 SYMATTR Value 270 SYMBOL npn 1072 -48 R0 WINDOW 0 80 14 Left 2 WINDOW 3 54 48 Left 2 SYMATTR InstName VT9 SYMATTR Value BD139_Cordell SYMBOL pnp 752 512 M180 WINDOW 0 77 36 Left 2 WINDOW 3 69 -1 Left 2 SYMATTR InstName VT6 SYMATTR Value 2N5771 SYMBOL pnp 848 448 M180 WINDOW 0 78 76 Left 2 WINDOW 3 61 46 Left 2 SYMATTR InstName VT8 SYMATTR Value 2N2907 SYMBOL pnp 1072 384 M180 WINDOW 0 74 84 Left 2 WINDOW 3 53 48 Left 2 SYMATTR InstName VT10 SYMATTR Value BD140_Cordell SYMBOL res 1152 64 M0 WINDOW 0 48 40 Left 2 WINDOW 3 51 76 Left 2 SYMATTR InstName R21 SYMATTR Value 1 SYMBOL res 1152 176 M0 WINDOW 0 46 40 Left 2 WINDOW 3 46 74 Left 2 SYMATTR InstName R22 SYMATTR Value 1 SYMBOL npn 592 224 M0 WINDOW 0 65 22 Left 2 WINDOW 3 26 50 Left 2 SYMATTR InstName VT4 SYMATTR Value 2N5089 SYMBOL res 608 0 R0 SYMATTR InstName R12 SYMATTR Value 4.7k SYMBOL res 608 336 R0 WINDOW 0 30 1 Left 2 SYMATTR InstName R1011 SYMATTR Value 895 SYMBOL cap 704 224 R0 SYMATTR InstName C14 SYMATTR Value 1µ SYMBOL res 1472 160 R90 WINDOW 0 -47 68 VBottom 2 WINDOW 3 -48 64 VTop 2 SYMATTR InstName Rload SYMATTR Value 32 SYMBOL res -304 304 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R4 SYMATTR Value 220 SYMBOL cap -304 192 M180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C3 SYMATTR Value 56p SYMBOL res -288 64 R90 WINDOW 0 -8 54 VBottom 2 WINDOW 3 31 54 VTop 2 SYMATTR InstName R3 SYMATTR Value 9.1k SYMBOL res 1088 -16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R17 SYMATTR Value 5 SYMBOL res 1088 320 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R18 SYMATTR Value 5 SYMBOL voltage 544 -432 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 0 40 53 Left 2 WINDOW 3 38 87 Left 2 SYMATTR InstName V4 SYMATTR Value 3.3 SYMBOL voltage 544 656 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 0 48 49 Left 2 WINDOW 3 47 79 Left 2 SYMATTR InstName V5 SYMATTR Value 3.3 SYMBOL res -416 64 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 1k SYMBOL cap -416 176 R0 WINDOW 0 45 10 Left 2 WINDOW 3 41 56 Left 2 SYMATTR InstName C10 SYMATTR Value 2.2n SYMBOL res 672 -464 R90 WINDOW 0 -4 66 VBottom 2 WINDOW 3 38 60 VTop 2 SYMATTR InstName R19 SYMATTR Value 43 SYMBOL res 720 752 R90 WINDOW 0 -6 67 VBottom 2 WINDOW 3 32 61 VTop 2 SYMATTR InstName R20 SYMATTR Value 43 SYMBOL cap 320 -432 R0 WINDOW 0 42 21 Left 2 WINDOW 3 39 44 Left 2 SYMATTR InstName C15 SYMATTR Value 1000µ SYMBOL cap -144 352 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C16 SYMATTR Value 1000µ SYMBOL res 1328 160 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R23 SYMATTR Value 2.7 SYMBOL Opamps\\LT1122 -128 32 R0 WINDOW 0 11 -89 Left 2 WINDOW 3 6 -50 Left 2 SYMATTR InstName DA1 SYMBOL res 176 656 R0 SYMATTR InstName R13 SYMATTR Value 120 SYMBOL pnp -32 144 M180 WINDOW 0 66 67 Left 2 WINDOW 3 57 25 Left 2 SYMATTR InstName VT11 SYMATTR Value 2N5087_Cordell SYMBOL res 16 -288 R0 WINDOW 3 42 76 Left 2 WINDOW 0 46 40 Left 2 SYMATTR Value 910 SYMATTR InstName R1 SYMBOL cap 144 -176 M0 WINDOW 0 47 1 Left 2 WINDOW 3 48 38 Left 2 SYMATTR InstName C1 SYMATTR Value 47p SYMBOL res 432 -128 R0 SYMATTR InstName R5 SYMATTR Value 560k SYMBOL res 432 336 R0 SYMATTR InstName R10 SYMATTR Value 560k TEXT -560 576 Left 2 !.four 20kHz 20 v(2) TEXT -568 744 Left 2 !.OPTIONS numdgt=7 TEXT -560 432 Left 2 !;ac dec 50 1 500meg TEXT -560 808 Left 2 !;op TEXT -568 704 Left 2 !.OPTIONS plotwinsize=0 TEXT -560 472 Left 2 !.tran 0 32ms 6ms 100ns TEXT -560 536 Left 2 !.four 20kHz 20 v(1) TEXT -560 616 Left 2 !.four 20kHz 20 v(3) TEXT -560 656 Left 2 !.four 20kHz 20 v(4) TEXT -552 776 Left 2 !;noise v(2) V1 dec 50 20 20k