Version 4 SHEET 1 2600 1360 WIRE -176 -352 -176 -368 WIRE 192 -352 -176 -352 WIRE -352 -320 -400 -320 WIRE -336 -320 -352 -320 WIRE 192 -320 192 -352 WIRE -912 -272 -960 -272 WIRE -816 -272 -832 -272 WIRE -720 -272 -752 -272 WIRE -672 -272 -720 -272 WIRE -624 -272 -672 -272 WIRE -448 -272 -544 -272 WIRE -448 -256 -448 -272 WIRE -352 -240 -352 -320 WIRE -720 -224 -720 -272 WIRE -672 -224 -672 -272 WIRE -400 -224 -400 -240 WIRE -384 -224 -400 -224 WIRE -176 -224 -176 -352 WIRE 64 -224 -64 -224 WIRE 624 -224 608 -224 WIRE -960 -208 -960 -272 WIRE -400 -208 -400 -224 WIRE 624 -144 608 -144 WIRE -352 -128 -352 -176 WIRE -352 -128 -400 -128 WIRE -336 -128 -352 -128 WIRE -64 -128 -64 -160 WIRE -176 -112 -176 -144 WIRE -176 -112 -240 -112 WIRE -960 -96 -960 -128 WIRE -720 -96 -720 -160 WIRE -720 -96 -960 -96 WIRE -672 -96 -672 -144 WIRE -672 -96 -720 -96 WIRE -448 -96 -448 -176 WIRE -448 -96 -672 -96 WIRE -384 -96 -384 -224 WIRE -448 -64 -448 -96 WIRE -240 -64 -240 -112 WIRE -384 0 -384 -16 WIRE 400 0 400 -16 WIRE 480 0 480 -16 WIRE -176 16 -176 -112 WIRE -64 16 -64 -48 WIRE -64 16 -176 16 WIRE 192 16 192 -16 WIRE 192 16 -64 16 WIRE -528 48 -560 48 WIRE -176 48 -176 16 WIRE -560 64 -560 48 WIRE 192 128 176 128 WIRE 192 144 192 128 WIRE -560 160 -560 144 WIRE -384 160 -384 96 WIRE -384 160 -560 160 WIRE -384 176 -384 160 WIRE 896 192 816 192 WIRE 992 192 976 192 WIRE 64 240 -48 240 WIRE 640 240 608 240 WIRE 672 240 640 240 WIRE 864 240 864 160 WIRE 672 256 672 240 WIRE 704 256 672 256 WIRE 816 256 816 192 WIRE 816 256 784 256 WIRE 832 256 816 256 WIRE -560 272 -576 272 WIRE -480 272 -560 272 WIRE -304 272 -432 272 WIRE 992 272 992 192 WIRE 992 272 896 272 WIRE 1024 272 1024 256 WIRE 1024 272 992 272 WIRE -560 288 -560 272 WIRE -480 288 -480 272 WIRE -432 288 -432 272 WIRE 704 288 672 288 WIRE 816 288 784 288 WIRE 832 288 816 288 WIRE 640 320 640 304 WIRE 640 320 608 320 WIRE 672 320 672 288 WIRE 672 320 640 320 WIRE -48 336 -48 304 WIRE 816 336 816 288 WIRE -560 384 -560 352 WIRE -560 384 -576 384 WIRE -480 384 -480 368 WIRE -480 384 -560 384 WIRE -432 384 -432 368 WIRE -304 384 -432 384 WIRE 816 432 816 416 WIRE 400 464 400 448 WIRE 480 464 480 448 WIRE -48 480 -48 416 WIRE 192 480 192 448 WIRE 192 480 -48 480 WIRE 192 528 192 480 WIRE 816 528 816 512 WIRE 864 528 864 304 WIRE 864 528 816 528 WIRE 864 560 864 528 FLAG -176 -368 Vdd IOPIN -176 -368 Out FLAG -176 48 GND IOPIN -176 48 Out FLAG -240 -64 0 FLAG -576 272 OUTb IOPIN -576 272 In FLAG -576 384 OUTa IOPIN -576 384 In FLAG 624 -224 OUTb IOPIN 624 -224 Out FLAG 624 -144 OUTa IOPIN 624 -144 Out FLAG 400 0 INa IOPIN 400 0 In FLAG 480 0 INb IOPIN 480 0 In FLAG -304 272 INc IOPIN -304 272 Out FLAG 176 128 Vdd IOPIN 176 128 In FLAG 192 528 GND IOPIN 192 528 In FLAG 400 464 INc IOPIN 400 464 In FLAG 480 464 INd IOPIN 480 464 In FLAG -304 384 INd IOPIN -304 384 Out FLAG 864 160 Vdd IOPIN 864 160 In FLAG 864 560 GND IOPIN 864 560 In FLAG 1024 256 Audio_Out IOPIN 1024 256 Out FLAG -384 176 0 FLAG -448 -64 0 FLAG -336 -320 INa IOPIN -336 -320 In FLAG -336 -128 INb IOPIN -336 -128 In SYMBOL voltage -176 -240 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 3 37 51 Left 0 SYMATTR Value 5V SYMATTR InstName V3 SYMBOL ind2 -496 272 R0 WINDOW 0 -22 45 Left 0 WINDOW 3 -49 71 Left 0 SYMATTR InstName L3 SYMATTR Value 2.5µh SYMATTR Type ind SYMBOL ind2 -416 272 M0 WINDOW 0 -38 48 Left 0 WINDOW 3 -53 75 Left 0 SYMATTR InstName L4 SYMATTR Value 2.5µh SYMATTR Type ind SYMBOL cap -576 288 R0 WINDOW 3 -90 57 Left 0 WINDOW 0 -66 28 Left 0 SYMATTR Value 788e-12 SYMATTR InstName C3 SYMBOL sa612 304 -176 R0 SYMATTR InstName X1 SYMBOL voltage -64 -144 R0 WINDOW 123 -106 105 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 48 22 Left 0 WINDOW 3 -103 133 Left 0 SYMATTR Value2 AC 1e-6 SYMATTR InstName V1 SYMATTR Value SINE(0 .3 10.42e6) SYMBOL cap -80 -224 R0 WINDOW 0 46 14 Left 0 WINDOW 3 42 42 Left 0 SYMATTR InstName C1 SYMATTR Value .001e-6 SYMBOL sa612 304 288 R0 SYMATTR InstName X2 SYMBOL voltage -48 320 R0 WINDOW 123 -112 85 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 -90 49 Left 0 WINDOW 3 -114 114 Left 0 SYMATTR Value2 AC 1e-6 SYMATTR InstName V4 SYMATTR Value SINE(0 .3 3.6e6) SYMBOL cap -64 240 R0 WINDOW 0 -51 23 Left 0 WINDOW 3 -64 57 Left 0 SYMATTR InstName C6 SYMATTR Value .001e-6 SYMBOL Opamps\\UniversalOpamp 864 272 R0 WINDOW 0 -26 -1 Left 0 SYMATTR InstName U1 SYMBOL res 992 176 R90 WINDOW 0 -32 61 VBottom 0 WINDOW 3 -29 61 VTop 0 SYMATTR InstName R2 SYMATTR Value 1000k SYMBOL res 800 240 R90 WINDOW 0 -36 63 VBottom 0 WINDOW 3 -33 61 VTop 0 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL res 800 272 R90 WINDOW 0 58 57 VBottom 0 WINDOW 3 64 54 VTop 0 SYMATTR InstName R5 SYMATTR Value 10k SYMBOL res 832 432 R180 WINDOW 0 -42 64 Left 0 WINDOW 3 -64 35 Left 0 SYMATTR InstName R6 SYMATTR Value 1000k SYMBOL voltage 816 416 R0 WINDOW 0 -76 16 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 3 -81 48 Left 0 SYMATTR InstName V6 SYMATTR Value 2.5V SYMBOL cap 624 240 R0 WINDOW 0 -34 17 Left 0 WINDOW 3 -51 57 Left 0 SYMATTR InstName C5 SYMATTR Value .001e-6 SYMBOL voltage -960 -224 R0 WINDOW 123 -149 31 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 -33 105 Left 0 WINDOW 3 -231 68 Left 0 SYMATTR Value2 AC 1 SYMATTR InstName V2 SYMATTR Value SINE(0 1uv 14e6) SYMBOL ind2 -464 -272 R0 WINDOW 0 -43 59 Left 0 WINDOW 3 -65 90 Left 0 SYMATTR InstName L1 SYMATTR Value .05µh SYMATTR Type ind SYMBOL ind2 -384 -336 M0 WINDOW 0 -67 33 Left 0 WINDOW 3 -90 61 Left 0 SYMATTR InstName L2 SYMATTR Value .625µh SYMATTR Type ind SYMBOL res -816 -288 R90 WINDOW 0 -31 61 VBottom 0 WINDOW 3 -24 62 VTop 0 SYMATTR InstName R1 SYMATTR Value 50 SYMBOL cap -368 -240 R0 WINDOW 3 42 31 Left 0 WINDOW 0 46 8 Left 0 SYMATTR Value 50p SYMATTR InstName C2 SYMBOL ind2 -384 -224 M0 WINDOW 0 -64 71 Left 0 WINDOW 3 -90 48 Left 0 SYMATTR InstName L5 SYMATTR Value .625µh SYMATTR Type ind SYMBOL res -400 -112 R0 SYMATTR InstName R4 SYMATTR Value 500 SYMBOL voltage -560 48 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 28 35 Left 0 WINDOW 3 36 61 Left 0 SYMATTR InstName V5 SYMATTR Value 0V SYMBOL npn -448 0 R0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL res -432 32 R90 WINDOW 0 -31 56 VBottom 0 WINDOW 3 -28 57 VTop 0 SYMATTR InstName R7 SYMATTR Value 200k SYMBOL ind -688 -240 R0 SYMATTR InstName L6 SYMATTR Value 1µh SYMATTR SpiceLine Rser=.01 SYMBOL cap -736 -224 R0 SYMATTR InstName C4 SYMATTR Value 130p SYMBOL cap -752 -288 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C7 SYMATTR Value 20p SYMBOL ind -640 -256 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 5 56 VBottom 0 SYMATTR InstName L7 SYMATTR Value 5.5µh SYMATTR SpiceLine Rser=0 TEXT -472 584 Left 0 !;tran 100usec TEXT -256 -248 Left 0 ;Power Supply TEXT -520 440 Left 0 !k2 L3 L4 .9 TEXT 384 -336 Left 0 ;1st Mixer TEXT 368 128 Left 0 ;Product Det. TEXT -496 232 Left 0 ;IF Filter TEXT -120 -576 Left 0 ;>>SIMPLE SA612 RECEIVER w/RF GAIN CONTROL<<\n -Fin = 14.0 MHz, Fif = 3.58 MHz, Faudio = 20 KHz.\n -LO & BFO crystal oscillators omitted to speed up analysis.\n -IF filter intentionally wide to speed up analysis\n -Faudio intentionally high to speed up analysis\n -Vin = 1uv pk-pk, Vout = 130mv pk-pk; voltage gain = 102dB\n -Vagc > .6 VDC reduces receiver gain TEXT -8 376 Left 0 ;BFO TEXT 880 312 Left 0 ;Audio ampliifier TEXT 856 472 Left 0 ;Op-amp bias TEXT -24 -96 Left 0 ;1st LO TEXT -496 552 Left 0 !.ac lin 200 10e6 20e6 TEXT -552 408 Left 0 ;T37-6 core; 29:29 turns TEXT -496 -352 Left 0 !k1 L1 L2 L5 .90 TEXT -544 -416 Left 0 ;Input matching network TEXT -528 136 Left 0 ;AGC Voltage TEXT -952 -216 Left 0 ;RF Signal TEXT -488 -288 Left 0 ;Vin TEXT -544 -384 Left 0 ;T37-6 core; 4:14:14 turns