Version 4
SHEET 1 1304 680
WIRE 752 -512 368 -512
WIRE 752 -448 752 -512
WIRE 752 -336 752 -368
WIRE 672 -224 -304 -224
WIRE -304 -96 -304 -224
WIRE -240 -96 -304 -96
WIRE 416 -80 320 -80
WIRE 528 -80 496 -80
WIRE 672 -80 672 -224
WIRE 672 -80 592 -80
WIRE 16 -64 -96 -64
WIRE 48 -64 16 -64
WIRE 848 -16 768 -16
WIRE 1008 -16 928 -16
WIRE 1024 -16 1008 -16
WIRE 320 16 320 -80
WIRE 480 16 320 16
WIRE 672 16 672 -80
WIRE 672 16 560 16
WIRE 48 48 48 -64
WIRE 112 48 48 48
WIRE 368 48 368 -512
WIRE 224 64 176 64
WIRE 320 64 320 16
WIRE 320 64 304 64
WIRE 336 64 320 64
WIRE 672 80 672 16
WIRE 672 80 400 80
WIRE 336 96 240 96
WIRE 112 112 -480 112
WIRE 768 112 768 -16
WIRE 672 128 672 80
WIRE 720 128 672 128
WIRE 1024 128 1024 -16
WIRE -480 144 -480 112
WIRE 720 176 672 176
WIRE 368 192 368 112
WIRE 240 208 240 96
WIRE 672 272 672 176
WIRE 768 272 768 192
WIRE 768 272 672 272
WIRE -480 304 -480 224
WIRE 768 320 768 272
WIRE 1024 320 1024 192
WIRE 240 336 240 288
FLAG 16 -64 OUT
FLAG -480 304 0
FLAG 752 -336 0
FLAG 768 320 0
FLAG 1024 320 0
FLAG 368 192 0
FLAG 240 336 0
FLAG 1008 -16 out1
FLAG 0 0 out1
SYMBOL SpecialFunctions\\modulate -240 -96 R0
WINDOW 3 0 0 Invisible 2
SYMATTR Value mark=3.3K space=2.7K
SYMATTR InstName A1
SYMBOL voltage -480 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 24 44 Left 2
SYMATTR Value wavefile ="D:\3khfs75BL.wav" chan=0
SYMATTR InstName V1
SYMBOL Digital\\xor 160 16 R0
WINDOW 3 0 0 Invisible 2
SYMATTR Value Ref=0
SYMATTR InstName A2
SYMBOL res 320 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 512 -96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 200R
SYMBOL cap 592 -96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1µF
SYMBOL e 768 96 R0
SYMATTR InstName E1
SYMATTR Value 1
SYMBOL res 944 -32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL cap 1008 128 R0
SYMATTR InstName C2
SYMATTR Value 470n
SYMBOL Opamps\\OP727 368 16 R0
SYMATTR InstName U1
SYMBOL res 576 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL voltage 752 -464 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 24 44 Left 2
SYMATTR Value 3V
SYMATTR InstName V2
SYMBOL voltage 240 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 24 44 Left 2
SYMATTR Value 0.5V
SYMATTR InstName V3
TEXT -256 368 Left 2 !.tran 10s
TEXT 872 -128 Left 2 !.wave "d:/demod.wav" 16 44100 out1