Version 4
SHEET 1 2740 956
WIRE -448 -384 -448 -400
WIRE -400 -384 -400 -400
WIRE 768 -368 768 -384
WIRE -464 -336 -496 -336
WIRE -352 -336 -384 -336
WIRE 656 -288 608 -288
WIRE 960 -288 912 -288
WIRE 976 -288 960 -288
WIRE 608 -272 608 -288
WIRE -176 -256 -176 -272
WIRE -128 -256 -176 -256
WIRE -176 -240 -176 -256
WIRE 608 -208 608 -272
WIRE -16 -192 -16 -224
WIRE 96 -192 96 -224
WIRE -496 -96 -496 -336
WIRE -448 -96 -496 -96
WIRE -352 -96 -352 -336
WIRE -352 -96 -384 -96
WIRE -272 -96 -352 -96
WIRE -192 -96 -272 -96
WIRE 608 -96 608 -128
WIRE 1120 -96 1120 -128
WIRE -352 -32 -352 -96
WIRE -720 -16 -752 -16
WIRE -624 -16 -720 -16
WIRE -496 -16 -496 -96
WIRE -496 -16 -544 -16
WIRE -400 -16 -496 -16
WIRE 0 -16 0 -32
WIRE -48 0 -80 0
WIRE -752 16 -752 -16
WIRE -400 32 -416 32
WIRE -192 48 -192 -96
WIRE -48 48 -192 48
WIRE 720 64 688 64
WIRE 912 64 880 64
WIRE 1072 64 1040 64
WIRE 1264 64 1232 64
WIRE -416 80 -416 32
WIRE -352 80 -352 48
WIRE 0 80 0 64
WIRE 160 80 0 80
WIRE 272 80 160 80
WIRE -176 96 -192 96
WIRE -80 96 -80 0
WIRE -80 96 -176 96
WIRE 0 96 0 80
WIRE -48 112 -48 48
WIRE 656 112 624 112
WIRE 720 112 656 112
WIRE 912 112 896 112
WIRE 1072 112 1040 112
WIRE 1264 112 1248 112
WIRE -752 128 -752 96
WIRE -80 160 -80 96
WIRE -48 160 -80 160
WIRE 800 176 800 160
WIRE 1152 176 1152 160
WIRE -560 208 -672 208
WIRE -400 208 -560 208
WIRE 0 208 0 176
WIRE -672 240 -672 208
WIRE -400 240 -432 240
WIRE -192 256 -192 96
WIRE -192 256 -224 256
WIRE -400 272 -448 272
WIRE 720 336 688 336
WIRE 912 336 880 336
WIRE 1072 336 1040 336
WIRE 1264 336 1232 336
WIRE -672 352 -672 320
WIRE 720 384 688 384
WIRE 912 384 896 384
WIRE 1072 384 1040 384
WIRE 1264 384 1248 384
WIRE 800 448 800 432
WIRE 1152 448 1152 432
FLAG -352 80 0
FLAG -752 128 0
FLAG -720 -16 Vref
FLAG -16 -192 0
FLAG -16 -304 VDD
FLAG 96 -192 0
FLAG 96 -304 Vclk
FLAG -672 352 0
FLAG -272 -96 Vc
FLAG -416 80 0
FLAG -560 208 Vin
FLAG 1120 -96 0
FLAG 1120 -208 VADC
FLAG 448 32 VDD
FLAG -176 -160 0
FLAG -176 -352 VDD
FLAG -128 -256 Vtrip
FLAG 912 64 b0
FLAG 912 112 bi0
FLAG 1040 112 bi1
FLAG 1264 64 b2
FLAG 1264 112 bi2
FLAG 1040 384 bi2
FLAG 1264 336 b3
FLAG 1264 384 bi3
FLAG -448 272 Vsamp
FLAG -432 240 0
FLAG 0 -32 VDD
FLAG 0 208 0
FLAG -400 -400 Vtrip
FLAG 688 64 bi0
FLAG 1040 64 bi2
FLAG 1040 336 bi3
FLAG 912 336 b1
FLAG 912 384 bi1
FLAG 688 384 bi0
FLAG 688 336 bi1
FLAG -448 -400 Vsamp
FLAG 1616 240 q1
FLAG 1616 288 q0
FLAG 1616 144 q3
FLAG 1616 192 q2
FLAG 1392 288 b0
FLAG 1392 240 b1
FLAG 1392 192 b2
FLAG 1392 144 b3
FLAG 1504 80 VDD
FLAG 272 112 Enable
FLAG 1504 352 Vsamp
FLAG 160 80 Vcomp
FLAG 608 -96 0
FLAG 608 -272 Vsamp
FLAG 768 -384 VDD
FLAG 960 -288 Enable
FLAG 272 144 Vclk
FLAG 1152 448 Vsamp
FLAG 800 448 Vsamp
FLAG 800 176 Vsamp
FLAG 1152 176 Vsamp
FLAG 656 112 Vcnt
FLAG -176 96 Vsh
SYMBOL e2 -352 -48 R0
SYMATTR InstName E1
SYMATTR Value 100MEG
SYMBOL cap -384 -112 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL res -528 -32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL voltage -752 0 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vref
SYMATTR Value -1
SYMBOL voltage -16 -320 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName VDD
SYMATTR Value 1
SYMBOL voltage 96 -320 R0
WINDOW 0 36 42 Left 0
WINDOW 3 35 69 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vclk
SYMATTR Value PULSE(0 1 0 1p 1p 31.25n 62.5n)
SYMBOL voltage -672 224 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vin
SYMATTR Value SINE(0.5 500m 10k)
SYMBOL bv 1120 -224 R0
SYMATTR InstName B1
SYMATTR Value V=(V(q0)/16 + V(q1)/8 + V(q2)/4 + V(q3)/2)
SYMBOL res -192 -368 R0
SYMATTR InstName R2
SYMATTR Value 100MEG
SYMBOL res -192 -256 R0
SYMATTR InstName R3
SYMATTR Value 100MEG
SYMBOL Digital\\dflop 800 16 R0
SYMATTR InstName A1
SYMBOL Digital\\dflop 1152 16 R0
SYMATTR InstName A3
SYMBOL Digital\\dflop 1152 288 R0
SYMATTR InstName A4
SYMBOL SpecialFunctions\\sample -320 240 R0
SYMATTR InstName A5
SYMBOL sw 0 80 M180
WINDOW 3 24 -12 Left 0
WINDOW 38 39 67 Left 0
WINDOW 0 38 33 Left 0
SYMATTR Value ""
SYMATTR SpiceModel switmod
SYMATTR InstName S2
SYMBOL sw 0 192 M180
WINDOW 3 24 -12 Left 0
WINDOW 38 39 67 Left 0
WINDOW 0 38 33 Left 0
SYMATTR Value ""
SYMATTR SpiceModel switmod
SYMATTR InstName S3
SYMBOL sw -368 -336 R90
WINDOW 3 24 -12 Left 0
WINDOW 38 39 67 Left 0
WINDOW 0 38 33 Left 0
SYMATTR Value ""
SYMATTR SpiceModel switmod
SYMATTR InstName S1
SYMBOL Digital\\dflop 800 288 R0
SYMATTR InstName A11
SYMBOL 4_bit_register 1424 320 R0
SYMATTR InstName X7
SYMBOL voltage 608 -224 R0
WINDOW 0 36 42 Left 0
WINDOW 3 35 69 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vsam
SYMATTR Value PULSE(0 1 62.5n 1p 1p 31.25n 1u)
SYMBOL Ideal_inverter 688 -352 R0
SYMATTR InstName X2
SYMBOL Ideal_NAND_3 224 128 R0
SYMATTR InstName X3
TEXT 176 288 Left 0 !.tran 0 105u 5u 1n uic
TEXT 176 256 Left 0 !.model switmod SW
TEXT 872 480 Left 0 ;4-bit Ripple Counter
TEXT 1304 -168 Left 0 ;Digital output
TEXT -72 256 Left 0 ;Comparator
TEXT -544 376 Left 0 ;Input
TEXT -680 -88 Left 0 ;Integrator
TEXT 376 192 Left 0 ;Control Logic
TEXT 296 -416 Left 0 ;Plot Vin and VADC