Version 4 SHEET 1 2772 680 WIRE 1440 -784 1440 -816 WIRE 1440 -656 1440 -704 WIRE 1440 -656 1360 -656 WIRE 1360 -624 1360 -656 WIRE 1440 -608 1440 -656 WIRE 1440 -464 1440 -528 WIRE 1104 -224 976 -224 WIRE 1488 -224 1296 -224 WIRE 1648 -224 1552 -224 WIRE 2000 -208 1808 -208 WIRE 2160 -208 2064 -208 WIRE 1040 -96 1040 -112 WIRE -144 -80 -368 -80 WIRE 416 -80 -16 -80 WIRE 976 -80 976 -224 WIRE 1008 -80 976 -80 WIRE 1520 -80 1520 -96 WIRE 592 -64 336 -64 WIRE 1104 -64 1104 -224 WIRE 1104 -64 1072 -64 WIRE 1184 -64 1104 -64 WIRE 1296 -64 1296 -224 WIRE 1296 -64 1264 -64 WIRE 1328 -64 1296 -64 WIRE 1424 -64 1408 -64 WIRE 1488 -64 1424 -64 WIRE 2032 -64 2032 -80 WIRE 864 -48 720 -48 WIRE 1008 -48 864 -48 WIRE 1648 -48 1648 -224 WIRE 1648 -48 1552 -48 WIRE 1696 -48 1648 -48 WIRE 1808 -48 1808 -208 WIRE 1808 -48 1776 -48 WIRE 1840 -48 1808 -48 WIRE 1936 -48 1920 -48 WIRE 2000 -48 1936 -48 WIRE 592 -32 592 -64 WIRE 1488 -32 1456 -32 WIRE 2160 -32 2160 -208 WIRE 2160 -32 2064 -32 WIRE -16 -16 -16 -80 WIRE 1040 -16 1040 -32 WIRE 2000 -16 1968 -16 WIRE 1520 0 1520 -16 WIRE 1424 16 1424 -64 WIRE 2032 16 2032 0 WIRE 1936 32 1936 -48 WIRE 192 48 80 48 WIRE 224 48 192 48 WIRE 336 48 336 -64 WIRE 336 48 288 48 WIRE -720 64 -720 32 WIRE -368 64 -368 -80 WIRE 192 80 192 48 WIRE 336 80 336 48 WIRE 1456 80 1456 -32 WIRE 1648 80 1648 -48 WIRE 1648 80 1456 80 WIRE -144 96 -144 -80 WIRE 720 96 720 -48 WIRE 864 96 864 -48 WIRE 1968 96 1968 -16 WIRE 2160 96 2160 -32 WIRE 2160 96 1968 96 WIRE -16 112 -16 64 WIRE 16 112 -16 112 WIRE 592 112 592 48 WIRE 592 112 560 112 WIRE 1424 128 1424 80 WIRE 1936 144 1936 96 WIRE -720 160 -720 144 WIRE -720 160 -800 160 WIRE -16 160 -16 112 WIRE 592 160 592 112 WIRE -800 176 -800 160 WIRE 192 176 192 144 WIRE 224 176 192 176 WIRE 336 176 336 144 WIRE 336 176 288 176 WIRE 416 176 416 -80 WIRE 416 176 336 176 WIRE -720 192 -720 160 WIRE -368 272 -368 144 WIRE -144 272 -144 176 WIRE -144 272 -368 272 WIRE -128 272 -144 272 WIRE -16 272 -16 240 WIRE -16 272 -48 272 WIRE 80 272 80 48 WIRE 80 272 -16 272 WIRE 192 272 192 176 WIRE 592 272 592 240 WIRE 592 272 192 272 WIRE 624 272 592 272 WIRE 720 272 720 176 WIRE 720 272 704 272 WIRE 864 272 864 176 WIRE 864 272 720 272 WIRE -368 336 -368 272 WIRE 864 336 864 272 FLAG -368 336 0 FLAG 864 336 0 FLAG -720 32 f2+ FLAG 16 112 f2+ FLAG -720 192 f2- FLAG 560 112 f2- FLAG -800 176 0 FLAG 1360 -624 0 FLAG 1440 -816 +5V FLAG 1440 -464 -5V FLAG 1040 -112 +5V FLAG 1040 -16 -5V FLAG 2032 16 +5V FLAG 2032 -80 -5V FLAG 1936 144 0 FLAG 2160 -32 out FLAG 1520 0 +5V FLAG 1520 -96 -5V FLAG 1424 128 0 SYMBOL ind2 -128 192 R180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L1 SYMATTR Value 0.5µ SYMATTR Type ind SYMBOL ind2 0 80 R180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L2 SYMATTR Value 0.5µ SYMATTR Type ind SYMBOL ind2 0 256 R180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L3 SYMATTR Value 0.5µ SYMATTR Type ind SYMBOL ind2 704 192 M180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L4 SYMATTR Value 0.5µ SYMATTR Type ind SYMBOL ind2 576 64 M180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L5 SYMATTR Value 0.5µ SYMATTR Type ind SYMBOL ind2 576 256 M180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L6 SYMATTR Value 0.5µ SYMATTR Type ind SYMBOL schottky 224 64 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value BAT54 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 320 80 R0 SYMATTR InstName D2 SYMATTR Value BAT54 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 288 160 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D3 SYMATTR Value BAT54 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 208 144 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D4 SYMATTR Value BAT54 SYMATTR Description Diode SYMATTR Type diode SYMBOL voltage -368 48 R0 WINDOW 3 -193 41 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 -130 86 Left 2 SYMATTR Value SINE(0 1 {f1}) SYMATTR SpiceLine Rser=50 SYMATTR InstName V1 SYMBOL voltage -720 48 R0 WINDOW 123 0 0 Left 2 WINDOW 39 24 124 Left 2 SYMATTR SpiceLine Rser=50 SYMATTR InstName V2 SYMATTR Value SINE(0 1 {f2}) SYMBOL res -32 256 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 100Meg SYMBOL voltage 1440 -800 R0 WINDOW 123 0 0 Left 2 WINDOW 39 24 124 Left 2 SYMATTR SpiceLine Rser=10m SYMATTR InstName V3 SYMATTR Value 5V SYMBOL voltage 1440 -624 R0 WINDOW 123 0 0 Left 2 WINDOW 39 24 124 Left 2 SYMATTR SpiceLine Rser=10m SYMATTR InstName V4 SYMATTR Value 5V SYMBOL Opamps\\LT1498 1040 -128 R0 SYMATTR InstName U1 SYMBOL Opamps\\LT1498 2032 32 M180 SYMATTR InstName U3 SYMBOL cap 2064 -224 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 150p SYMBOL cap 1952 96 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C2 SYMATTR Value 100p SYMBOL res 1936 -64 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 402 SYMBOL res 1792 -64 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 365 SYMBOL Opamps\\LT1498 1520 16 M180 SYMATTR InstName U2 SYMBOL cap 1552 -240 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value 110p SYMBOL cap 1440 80 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C4 SYMATTR Value 100p SYMBOL res 1424 -80 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 590 SYMBOL res 1280 -80 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 374 SYMBOL res 848 80 R0 SYMATTR InstName R1 SYMATTR Value 50 SYMBOL res 720 256 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 100Meg TEXT -168 -144 Left 2 !K1 L1 L2 L3 0.99 TEXT 584 -144 Left 2 !K2 L4 L5 L6 0.99 TEXT -752 360 Left 2 !.tran 1m startup uic TEXT -736 440 Left 2 !.param fm 10k\n.param f1 5Meg\n.param f2 f1+fm