Version 4 SHEET 1 1428 720 WIRE -224 -640 -256 -640 WIRE -80 -640 -112 -640 WIRE 16 -640 -80 -640 WIRE 16 -624 16 -640 WIRE -256 -576 -256 -640 WIRE -112 -576 -112 -640 WIRE 16 -512 16 -544 WIRE 80 -512 16 -512 WIRE 16 -496 16 -512 WIRE -256 -384 -256 -496 WIRE -112 -384 -112 -496 WIRE 16 -384 16 -416 WIRE -208 -320 -240 -320 WIRE -144 -288 -144 -320 WIRE -96 -288 -144 -288 WIRE -240 -272 -240 -320 WIRE -224 -272 -240 -272 WIRE -144 -272 -144 -288 WIRE -576 -208 -704 -208 WIRE -544 -208 -576 -208 WIRE -464 -208 -480 -208 WIRE -368 -208 -384 -208 WIRE 448 -176 448 -192 WIRE -368 -128 -368 -208 WIRE -320 -128 -368 -128 WIRE -240 -128 -240 -272 WIRE -240 -128 -320 -128 WIRE -208 -128 -240 -128 WIRE 208 -128 208 -144 WIRE -96 -112 -96 -288 WIRE -96 -112 -144 -112 WIRE -64 -112 -96 -112 WIRE 160 -112 16 -112 WIRE 176 -112 160 -112 WIRE -208 -96 -224 -96 WIRE 256 -96 240 -96 WIRE 352 -96 336 -96 WIRE 560 -96 544 -96 WIRE -704 -80 -704 -128 WIRE -448 -80 -480 -80 WIRE -368 -80 -368 -128 WIRE 176 -80 160 -80 WIRE 208 -48 208 -64 WIRE -224 0 -224 -96 WIRE -128 0 -224 0 WIRE -48 0 -128 0 WIRE 0 0 -48 0 WIRE 160 0 160 -80 WIRE 160 0 0 0 FLAG -112 -384 0 FLAG -256 -384 0 FLAG -80 -640 V+ FLAG -176 -144 V+ FLAG -128 0 cmp FLAG 80 -512 cmp FLAG 560 -96 q FLAG -480 -80 neg_q FLAG -224 -640 clk FLAG 352 -64 clk FLAG -176 -80 0 FLAG 208 -144 0 FLAG 16 -384 0 FLAG 208 -48 V+ FLAG 448 -192 V+ FLAG 448 48 V+ FLAG -320 -128 step1 FLAG 160 -112 step2 FLAG -576 -128 0 FLAG 544 -32 neg_q FLAG -48 64 0 FLAG 0 64 0 FLAG -704 -80 0 SYMBOL res -480 -192 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R1 SYMATTR Value 430 SYMBOL res -464 -64 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R2 SYMATTR Value 5k SYMBOL voltage -112 -592 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 -256 -592 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 39 163 Left 0 WINDOW 3 -417 150 Left 0 SYMATTR InstName V4 SYMATTR Value PULSE(0 3.3 0 0 0 8.92586n 15.85172n) SYMBOL Opamps\\LT1807 208 -32 M180 WINDOW 3 -39 -42 Left 0 WINDOW 0 -21 161 Left 0 SYMATTR InstName U4 SYMBOL Opamps\\LT1807 -176 -176 R0 WINDOW 3 -23 242 Left 0 SYMATTR InstName U1 SYMBOL res 0 -640 R0 SYMATTR InstName R6 SYMATTR Value 3.3k SYMBOL res 0 -512 R0 SYMATTR InstName R7 SYMATTR Value 3.3k SYMBOL Digital\\74HC\\74hc74 448 -176 R0 WINDOW 39 -126 -72 Left 0 SYMATTR SpiceLine VCC=3.3 SPEED=0.5 TRIPDT=1e-9 SYMATTR InstName U8 SYMBOL res -80 -96 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R10 SYMATTR Value 30k SYMBOL res 240 -80 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R13 SYMATTR Value 49 SYMBOL cap -544 -192 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C5 SYMATTR Value 1n SYMBOL res -592 -224 R0 SYMATTR InstName R3 SYMATTR Value 50 SYMBOL ind -128 -288 R90 WINDOW 0 66 49 VBottom 0 WINDOW 3 67 42 VTop 0 SYMATTR InstName L1 SYMATTR Value 22u SYMATTR SpiceLine Rser=0.1 SYMBOL cap -144 -336 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 -21 -10 VTop 0 SYMATTR InstName C1 SYMATTR Value 22.84p SYMBOL cap -16 0 R0 WINDOW 0 2 128 Left 0 WINDOW 3 47 31 Left 0 SYMATTR InstName C6 SYMATTR Value 100p SYMBOL cap -64 0 R0 WINDOW 0 2 126 Left 0 WINDOW 3 -60 38 Left 0 SYMATTR InstName C2 SYMATTR Value 0.1u SYMBOL voltage -704 -224 R0 WINDOW 0 17 144 Left 0 WINDOW 3 -29 -23 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value SINE(0 0.1 7.1Meg) TEXT -592 -632 Left 0 !.tran 1m uic TEXT -256 -672 Left 0 ;56MHz TEXT -592 -600 Left 0 !.include 74HC.lib TEXT -592 -560 Left 0 !.option plotwinsize=0 TEXT -64 -288 Left 0 ;7.1MHz 22.84pF