Version 4 SHEET 1 1428 720 WIRE -352 -432 -368 -432 WIRE -304 -432 -352 -432 WIRE -256 -432 -304 -432 WIRE -160 -432 -176 -432 WIRE -128 -432 -160 -432 WIRE -32 -432 -48 -432 WIRE 16 -432 -32 -432 WIRE 128 -432 96 -432 WIRE 192 -432 128 -432 WIRE 208 -432 192 -432 WIRE -448 -352 -448 -432 WIRE 192 -336 192 -352 WIRE -512 -320 -528 -320 WIRE -560 -240 -560 -256 WIRE -608 -224 -608 -320 WIRE -608 -224 -624 -224 WIRE -592 -224 -608 -224 WIRE -512 -208 -512 -320 WIRE -512 -208 -528 -208 WIRE -464 -208 -512 -208 WIRE -432 -208 -464 -208 WIRE -336 -208 -352 -208 WIRE -224 -208 -256 -208 WIRE -128 -208 -160 -208 WIRE -592 -192 -640 -192 WIRE 160 -176 160 -208 WIRE -176 -160 -192 -160 WIRE -560 -144 -560 -176 WIRE -192 -144 -192 -160 WIRE -336 -128 -336 -208 WIRE -256 -128 -256 -208 WIRE -256 -128 -336 -128 WIRE -224 -128 -256 -128 WIRE -128 -112 -128 -208 WIRE -128 -112 -160 -112 WIRE -80 -112 -128 -112 WIRE -224 -96 -256 -96 WIRE 64 -96 -16 -96 WIRE 288 -96 256 -96 WIRE 352 -96 288 -96 WIRE 464 -96 432 -96 WIRE 512 -96 464 -96 WIRE 640 -96 592 -96 WIRE 688 -96 640 -96 WIRE -336 -80 -336 -128 WIRE -112 -80 -128 -80 WIRE -80 -80 -112 -80 WIRE 64 -64 48 -64 WIRE -48 -32 -48 -64 WIRE -32 -32 -48 -32 WIRE 160 80 160 48 WIRE -160 192 -192 192 WIRE -16 192 -48 192 WIRE 80 192 -16 192 WIRE 80 208 80 192 WIRE -192 256 -192 192 WIRE -48 256 -48 192 WIRE 80 320 80 288 WIRE 208 320 80 320 WIRE 80 336 80 320 WIRE 304 336 272 336 WIRE 368 336 304 336 WIRE 208 352 176 352 WIRE 176 400 176 352 WIRE 304 400 304 336 WIRE 304 400 176 400 WIRE -192 448 -192 336 WIRE -48 448 -48 336 WIRE 80 448 80 416 FLAG -448 -352 0 FLAG -48 448 0 FLAG -192 448 0 FLAG -16 192 V+ FLAG -176 -160 V+ FLAG -256 -96 cmp FLAG -112 -80 cmp FLAG 368 336 cmp FLAG 288 -96 q FLAG -416 -80 q FLAG -160 192 clk FLAG 48 -64 clk FLAG -192 -80 0 FLAG -48 -128 0 FLAG -560 -144 0 FLAG -560 -256 V+ FLAG -352 -432 in FLAG -464 -208 V_shift FLAG 80 448 0 FLAG -352 -352 0 FLAG 240 368 V+ FLAG -32 -32 V+ FLAG 240 304 0 FLAG -304 -368 0 FLAG -160 -368 0 FLAG -32 -368 0 FLAG 128 -368 0 FLAG 192 -336 0 FLAG 160 -208 V+ FLAG 160 80 V+ FLAG -640 -192 cmp FLAG 208 -432 a FLAG -768 -224 a FLAG 464 -32 0 FLAG 640 -32 0 FLAG 688 -96 out SYMBOL voltage -352 -432 R90 WINDOW 0 32 56 VTop 0 WINDOW 3 -31 -3 VBottom 0 WINDOW 123 0 0 Left 0 WINDOW 39 101 62 VTop 0 SYMATTR InstName V2 SYMATTR Value SINE(0 1m 50k) SYMATTR SpiceLine Rser=50 SYMBOL res -448 -192 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R1 SYMATTR Value 430 SYMBOL res -432 -64 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R2 SYMATTR Value 4.3k SYMBOL cap -224 -192 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 91 35 VBottom 0 SYMATTR InstName C1 SYMATTR Value 10n SYMBOL voltage -48 240 R0 WINDOW 0 17 144 Left 0 WINDOW 3 43 55 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V3 SYMATTR Value 3.3 SYMBOL voltage -192 240 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 39 163 Left 0 WINDOW 3 -195 113 Left 0 SYMATTR InstName V4 SYMATTR Value PULSE(0 3.3 0 0 0 10n 20n) SYMBOL res -720 -208 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 83 55 VBottom 0 SYMATTR InstName R3 SYMATTR Value 1k SYMBOL res -624 -304 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 81 52 VBottom 0 SYMATTR InstName R5 SYMATTR Value 10k SYMBOL Opamps\\LT1807 -48 -32 M180 WINDOW 3 -39 -42 Left 0 SYMATTR InstName U4 SYMBOL Opamps\\LT1807 -192 -176 R0 WINDOW 3 -32 185 Left 0 SYMATTR InstName U1 SYMBOL Opamps\\LT1807 -560 -272 R0 WINDOW 3 -43 198 Left 0 SYMATTR InstName U2 SYMBOL res 64 192 R0 SYMATTR InstName R6 SYMATTR Value 3.3k SYMBOL res 64 320 R0 SYMATTR InstName R7 SYMATTR Value 3.3k SYMBOL Opamps\\LT1006 240 400 M180 SYMATTR InstName U6 SYMBOL cap -320 -432 R0 SYMATTR InstName C3 SYMATTR Value 460p SYMBOL ind -272 -416 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 5 56 VBottom 0 SYMATTR InstName L1 SYMATTR Value 0.82u SYMBOL cap -176 -432 R0 SYMATTR InstName C5 SYMATTR Value 700p SYMBOL cap -48 -432 R0 SYMATTR InstName C6 SYMATTR Value 700p SYMBOL cap 112 -432 R0 WINDOW 0 37 28 Left 0 SYMATTR InstName C7 SYMATTR Value 460p SYMBOL ind -144 -416 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 5 56 VBottom 0 SYMATTR InstName L2 SYMATTR Value 0.82u SYMBOL ind 0 -416 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 5 56 VBottom 0 SYMATTR InstName L3 SYMATTR Value 0.82u SYMBOL res 176 -448 R0 WINDOW 0 -2 136 Left 0 SYMATTR InstName R12 SYMATTR Value 50 SYMBOL Digital\\74HC\\74hc74 160 -176 R0 SYMATTR InstName U8 SYMATTR SpiceLine VCC=3.3 SPEED=1.0 TRIPDT=1e-9 SYMBOL cap -768 -208 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C4 SYMATTR Value 10u SYMBOL res 336 -80 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R4 SYMATTR Value 2.2k SYMBOL res 496 -80 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R8 SYMATTR Value 3.3k SYMBOL cap 448 -96 R0 SYMATTR InstName C2 SYMATTR Value 680p SYMBOL cap 624 -96 R0 SYMATTR InstName C8 SYMATTR Value 680p TEXT -744 -24 Left 0 !.tran 1m TEXT -192 160 Left 0 ;50MHz TEXT -608 -104 Left 0 ;level shift TEXT -200 -504 Left 0 ;12MHz LPF 7th Chebychev TEXT -744 8 Left 0 !.include 74HC.lib TEXT 448 64 Left 0 ;100KHz LPF CIRCLE Normal -320 -144 -448 -272 CIRCLE Normal -112 -144 -272 -304