Version 4
SHEET 1 880 680
WIRE 112 272 112 288
WIRE 112 128 112 144
WIRE 208 144 272 144
WIRE 272 144 272 240
WIRE 144 240 224 240
WIRE 272 240 272 256
WIRE -208 80 -208 96
WIRE -16 384 -16 352
WIRE -16 144 0 144
WIRE -16 352 -16 256
WIRE -208 192 -208 224
WIRE 272 144 304 144
WIRE -16 464 -16 480
WIRE 384 320 384 336
WIRE 384 256 384 240
WIRE 384 240 272 240
WIRE 80 352 -16 352
WIRE 144 352 224 352
WIRE 224 352 224 240
WIRE 224 240 272 240
WIRE -64 240 -64 224
WIRE -192 224 -208 224
WIRE -208 224 -208 256
WIRE -112 224 -64 224
WIRE -208 336 -209 306
WIRE 80 256 -16 256
WIRE -16 256 -16 144
WIRE -208 0 -208 -16
WIRE 112 -128 112 -112
WIRE 128 -256 112 -256
WIRE 112 -256 112 -192
WIRE 208 -256 272 -256
WIRE 272 -256 272 -160
WIRE 144 -160 224 -160
WIRE 272 -160 272 -144
WIRE -16 -16 -16 -48
WIRE -16 -256 0 -256
WIRE -16 -48 -16 -144
WIRE 80 -256 112 -256
WIRE 272 -256 304 -256
WIRE -16 64 -16 80
WIRE 384 -80 384 -64
WIRE 384 -144 384 -160
WIRE 384 -160 272 -160
WIRE 80 -48 -16 -48
WIRE 144 -48 224 -48
WIRE 224 -48 224 -160
WIRE 224 -160 272 -160
WIRE 80 -144 -16 -144
WIRE -16 -144 -16 -256
WIRE -64 224 80 224
WIRE -208 224 -272 224
WIRE -272 224 -272 -176
WIRE -272 -176 80 -176
WIRE 80 144 112 144
WIRE 112 144 112 208
WIRE 128 144 112 144
WIRE 112 -272 112 -256
FLAG 112 288 0
FLAG -208 96 0
FLAG 272 336 0
FLAG -16 480 0
FLAG -208 336 0
FLAG 304 144 Qshift
FLAG -208 192 Vref
FLAG 384 336 0
FLAG -64 304 0
FLAG -208 -16 +5V
FLAG 112 -112 0
FLAG 272 -64 0
FLAG -16 80 0
FLAG 304 -256 Qref
FLAG 384 -64 0
FLAG 112 -272 +5V
FLAG 112 128 +5V
SYMBOL Comparators\\LT1720 112 176 R0
SYMATTR InstName U1
SYMBOL voltage -208 -16 R0
WINDOW 0 38 49 Left 0
WINDOW 3 41 70 Left 0
WINDOW 123 0 0 Left 0
SYMATTR InstName V+5V
SYMATTR Value +5V
SYMBOL res 112 160 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R1
SYMATTR Value 100
SYMBOL res 256 240 R0
SYMATTR InstName R2
SYMATTR Value 100
SYMBOL res 0 480 R180
WINDOW 0 -41 76 Left 0
WINDOW 3 -43 42 Left 0
SYMATTR InstName R3
SYMATTR Value 1K
SYMBOL res -16 160 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R4
SYMATTR Value 1K
SYMBOL voltage -208 240 R0
WINDOW 3 -292 134 Left 0
WINDOW 0 -128 34 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 -130 70 Left 0
SYMATTR Value PULSE(+1V +4V 0 10nS 10nS 40nS 100nS)
SYMATTR InstName V10MHz
SYMATTR SpiceLine Rser=50
SYMBOL cap 144 336 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 20pF
SYMBOL cap 368 256 R0
SYMATTR InstName C2
SYMATTR Value 33pF
SYMBOL res -208 240 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R5
SYMATTR Value 450
SYMBOL cap -80 240 R0
WINDOW 0 -35 9 Left 0
WINDOW 3 -64 46 Left 0
SYMATTR InstName C3
SYMATTR Value 500pF
SYMBOL Comparators\\LT1720 112 -224 R0
SYMATTR InstName U2
SYMBOL res 112 -240 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R6
SYMATTR Value 100
SYMBOL res 256 -160 R0
SYMATTR InstName R7
SYMATTR Value 100
SYMBOL res 0 80 R180
WINDOW 0 -41 76 Left 0
WINDOW 3 -43 42 Left 0
SYMATTR InstName R8
SYMATTR Value 1K
SYMBOL res -16 -240 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R9
SYMATTR Value 1K
SYMBOL cap 144 -64 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C4
SYMATTR Value 20pF
SYMBOL cap 368 -144 R0
SYMATTR InstName C5
SYMATTR Value 33pF
TEXT -364 402 Left 0 !.tran 0 1.2uS 1uS 1nS