Version 4 SHEET 1 2188 680 WIRE 144 160 144 208 WIRE 144 288 144 336 WIRE 144 160 544 160 WIRE 544 160 544 208 WIRE 544 240 544 304 WIRE 576 208 544 208 WIRE 576 240 544 240 WIRE 704 224 752 224 WIRE 800 176 800 224 WIRE 752 160 752 224 WIRE 752 288 752 224 WIRE 752 112 720 112 WIRE 752 336 720 336 WIRE 800 224 832 224 WIRE 800 224 800 272 WIRE 800 96 800 64 WIRE 800 64 896 64 WIRE 800 352 800 384 WIRE 800 384 896 384 WIRE 1328 176 1328 208 WIRE 1328 320 1328 384 WIRE 1328 96 1328 64 WIRE 1136 176 1136 64 WIRE 1136 64 1024 64 WIRE 1136 64 1232 64 WIRE 1136 256 1136 384 WIRE 1136 384 1024 384 WIRE 1136 384 1232 384 WIRE 1232 176 1232 64 WIRE 1232 64 1328 64 WIRE 1232 240 1232 384 WIRE 1232 384 1328 384 WIRE 1536 128 1808 128 WIRE 1888 128 1952 128 WIRE 1952 128 1952 208 WIRE 1952 272 1952 336 WIRE 1952 128 2032 128 WIRE 1328 208 1376 208 WIRE 1328 208 1328 240 WIRE 1536 192 1536 128 WIRE 1536 272 1536 336 WIRE 896 64 960 64 WIRE 896 384 960 384 FLAG 144 336 0 FLAG 544 304 0 FLAG 720 112 0 FLAG 720 336 0 FLAG 832 224 0 FLAG 1952 336 0 FLAG 2032 128 demod IOPIN 2032 128 Out FLAG 1376 208 0 FLAG 1536 336 0 FLAG 896 64 1 FLAG 896 384 2 FLAG 1136 64 3 FLAG 1136 384 4 FLAG 144 160 mod SYMBOL voltage 144 192 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value SFFM(0 1m 455k 5 1k) SYMBOL D:\\WUTemp\\Fm_demod\\OTA2 608 224 R0 SYMATTR InstName A2 SYMATTR Value G=1e3 Vhigh=100 Vlow=-100 Iout=10m SYMATTR Value2 Rout=50 Cout=1p SYMBOL e 800 80 R0 SYMATTR InstName E1 SYMATTR Value -1 SYMBOL e 800 256 R0 SYMATTR InstName E2 SYMATTR Value 1 SYMBOL res 1312 80 R0 SYMATTR InstName R3 SYMATTR Value 3.6k SYMBOL res 1312 224 R0 SYMATTR InstName R4 SYMATTR Value 3.6k SYMBOL ind 1120 160 R0 SYMATTR InstName L1 SYMATTR Value {L1} SYMBOL cap 1216 176 R0 SYMATTR InstName C1 SYMATTR Value {C1} SYMBOL cap 960 80 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C2 SYMATTR Value {C2} SYMBOL cap 960 400 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C3 SYMATTR Value {C2} SYMBOL res 1792 144 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R5 SYMATTR Value 10k SYMBOL cap 1936 208 R0 SYMATTR InstName C4 SYMATTR Value 3.3n SYMBOL bv 1536 176 R0 SYMATTR InstName B1 SYMATTR Value V=V(1,2)*V(3,4) TEXT 88 -176 Left 0 !.tran 0 10m 0 10n TEXT 368 -224 Left 0 !.param F0=455e3\n.param C1=38.0p*10.7e6/F0\n.param L1=5.6u*10.7e6/F0\n.param C2=2.9p*10.7e6/F0 TEXT 88 -408 Left 0 ;FREQUENCY MODULATION RECEIVER/DEMODULATOR\nHelmut Sennewald 05/24/2004\nhttp://n.ethz.ch/student/rodonil/da/bericht/node53.html\nhttp://www.camuw.demon.co.uk/web_site/g3ynh/circuits/TBA120.html TEXT 256 -40 Left 0 ;ZF-Signal TEXT 104 32 Left 0 ;Selective Receiver\n Narrow Band FM\nIF=455kHz TEXT 128 -40 Left 0 ;Frontend TEXT 592 -40 Left 0 ;Limiting Amplifier TEXT 1040 -40 Left 0 ;90 Degree Phase Shifter TEXT 1520 48 Left 0 ;Gilbert Cell TEXT 1880 -56 Left 0 ;Lowpass TEXT 520 32 Left 0 ;Differential Output Amplifier\nGain: 60dB to 100dB TEXT 1512 -40 Left 0 ;Demodulator/Mixer TEXT 264 128 Left 0 ;From 1st Mixer RECTANGLE Normal 880 448 496 0 2 RECTANGLE Normal 1424 448 928 0 2 RECTANGLE Normal 1744 448 1472 0 2 RECTANGLE Normal 2144 448 1792 0 2 RECTANGLE Normal 448 448 80 0 2