Version 4
SHEET 1 1460 820
WIRE 176 112 48 112
WIRE 288 112 176 112
WIRE 624 112 288 112
WIRE 288 160 288 112
WIRE 624 160 624 112
WIRE 48 256 48 112
WIRE 288 288 288 240
WIRE 320 288 288 288
WIRE 624 288 624 240
WIRE 624 288 592 288
WIRE 1056 304 864 304
WIRE 1184 304 1136 304
WIRE 1216 304 1184 304
WIRE 288 336 288 288
WIRE 624 336 624 288
WIRE 864 352 864 304
WIRE 1184 352 1184 304
WIRE 48 464 48 336
WIRE 288 464 288 416
WIRE 624 464 624 416
WIRE 864 464 864 432
WIRE 1184 464 1184 416
WIRE 48 560 48 528
WIRE 48 688 48 640
FLAG 48 464 0
FLAG 624 464 0
FLAG 48 688 0
FLAG 320 288 Ud1
FLAG 592 288 Ud2
FLAG 176 112 U1
FLAG 1184 464 0
FLAG 48 528 1
FLAG 288 464 0
FLAG 864 464 0
FLAG 1216 304 out
IOPIN 1216 304 Out
FLAG 864 304 mix
SYMBOL voltage 48 240 M0
WINDOW 123 24 44 Left 2
WINDOW 39 24 124 Left 2
WINDOW 3 -195 106 Left 2
WINDOW 0 -64 26 Left 2
SYMATTR Value SINE(0 4 5k)
SYMATTR InstName V1
SYMBOL res 608 144 R0
SYMATTR InstName R1
SYMATTR Value 24000
SYMBOL res 608 320 R0
SYMATTR InstName R2
SYMATTR Value 24000
SYMBOL res 272 144 R0
SYMATTR InstName R3
SYMATTR Value 500k
SYMBOL res 272 320 R0
WINDOW 3 25 100 Left 2
SYMATTR InstName R4
SYMATTR Value R=500k*(1+0.1*V(1))
SYMBOL voltage 48 544 R0
WINDOW 3 26 106 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value SINE(0 1 10)
SYMATTR InstName V2
SYMBOL cap 1168 352 R0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL res 1152 288 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 1e5
SYMBOL bv 864 336 R0
SYMATTR InstName B1
SYMATTR Value V=V(Ud1,Ud2)*V(U1)
TEXT 328 576 Left 2 !.tran 0 1 0 5u
TEXT 792 232 Left 2 ;Demodulator
TEXT 1048 232 Left 2 ;Tiefpass
TEXT 328 616 Left 2 !.options plotwinsize=0