Version 4
SHEET 1 1464 792
WIRE 368 -16 368 -64
WIRE 368 -16 304 -16
WIRE 576 -16 576 -64
WIRE 576 -16 512 -16
WIRE 800 -16 800 -64
WIRE 800 -16 736 -16
WIRE 304 0 304 -16
WIRE 512 0 512 -16
WIRE 736 0 736 -16
WIRE -240 80 -288 80
WIRE -208 80 -240 80
WIRE 128 80 64 80
WIRE 256 80 128 80
WIRE 464 80 256 80
WIRE 688 80 464 80
WIRE -288 128 -288 80
WIRE 304 128 304 96
WIRE 512 128 512 96
WIRE 736 128 736 96
WIRE 64 144 64 80
WIRE -288 256 -288 208
WIRE 64 272 64 224
WIRE -240 304 -288 304
WIRE -208 304 -240 304
WIRE -288 336 -288 304
WIRE 368 368 368 -16
WIRE 576 368 576 -16
WIRE 800 368 800 -16
WIRE 368 416 368 368
WIRE 400 416 368 416
WIRE 576 416 576 368
WIRE 608 416 576 416
WIRE 800 416 800 368
WIRE 832 416 800 416
WIRE -288 464 -288 416
WIRE 368 496 368 416
WIRE 576 496 576 416
WIRE 800 496 800 416
WIRE 240 576 176 576
WIRE 320 576 240 576
WIRE 528 576 320 576
WIRE 752 576 528 576
WIRE 176 640 176 576
WIRE 368 640 368 592
WIRE 576 640 576 592
WIRE 800 640 800 592
WIRE 176 768 176 720
FLAG 304 48 0
FLAG 304 208 VDDby2
FLAG 512 48 0
FLAG 512 208 VDDby2
FLAG 64 272 0
FLAG 128 80 WL
FLAG 464 416 0
FLAG 672 416 0
FLAG 368 544 0
FLAG 576 544 0
FLAG 176 768 0
FLAG 240 576 Write
FLAG 368 640 0
FLAG -288 464 0
FLAG 368 368 bit1
FLAG 576 368 bit2
FLAG -288 256 0
FLAG -240 80 VDDby2
FLAG -240 304 VDD
FLAG 736 48 0
FLAG 736 208 VDDby2
FLAG 896 416 0
FLAG 800 544 0
FLAG 800 368 bit3
FLAG 576 720 0
FLAG 800 720 0
SYMBOL nmos4 256 0 R0
WINDOW 0 56 32 Invisible 0
WINDOW 3 56 72 Invisible 0
SYMATTR InstName M1
SYMATTR Value N_50n
SYMATTR Value2 l=50n w=250n
SYMBOL nmos4 464 0 R0
WINDOW 0 56 32 Invisible 0
WINDOW 3 56 72 Invisible 0
SYMATTR InstName M2
SYMATTR Value N_50n
SYMATTR Value2 l=50n w=250n
SYMBOL voltage 64 128 R0
WINDOW 3 -53 166 VLeft 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 1.5 20n 10p)
SYMATTR InstName VWL
SYMBOL cap 672 400 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 38 33 VTop 0
SYMATTR InstName Cbit2
SYMATTR Value 200f
SYMBOL cap 464 400 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 39 34 VTop 0
SYMATTR InstName Cbit1
SYMATTR Value 200f
SYMBOL nmos4 320 496 R0
WINDOW 0 56 32 Invisible 0
WINDOW 3 56 72 Invisible 0
SYMATTR InstName M3
SYMATTR Value N_50n
SYMATTR Value2 l=50n w=2500n
SYMBOL nmos4 528 496 R0
WINDOW 0 56 32 Invisible 0
WINDOW 3 56 72 Invisible 0
SYMATTR InstName M4
SYMATTR Value N_50n
SYMATTR Value2 l=50n w=2500n
SYMBOL voltage 176 624 R0
WINDOW 3 -53 166 VLeft 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 1.5 40n 10p 10p 20n)
SYMATTR InstName Vwrite
SYMBOL voltage -288 320 R0
WINDOW 0 45 42 Left 0
WINDOW 3 48 71 Left 0
SYMATTR InstName VDD
SYMATTR Value 1
SYMBOL voltage -288 112 R0
WINDOW 0 35 37 Left 0
WINDOW 3 37 72 Left 0
SYMATTR InstName VDDby2
SYMATTR Value 0.5
SYMBOL nmos4 688 0 R0
WINDOW 0 56 32 Invisible 0
WINDOW 3 56 72 Invisible 0
SYMATTR InstName M5
SYMATTR Value N_50n
SYMATTR Value2 l=50n w=250n
SYMBOL cap 896 400 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 38 33 VTop 0
SYMATTR InstName Cbit3
SYMATTR Value 200f
SYMBOL nmos4 752 496 R0
WINDOW 0 56 32 Invisible 0
WINDOW 3 56 72 Invisible 0
SYMATTR InstName M6
SYMATTR Value N_50n
SYMATTR Value2 l=50n w=2500n
SYMBOL mbit1 304 128 R0
SYMATTR InstName X1
SYMBOL mbit1 512 128 R0
SYMATTR InstName X2
SYMBOL mbit1 736 128 R0
SYMATTR InstName X3
SYMBOL voltage 576 624 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 200mV
SYMBOL voltage 800 624 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 1 0 100n)
TEXT -48 352 Left 0 !.lib cmosedu_models.txt
TEXT -48 328 Left 0 !.tran 0 100n 0 uic
TEXT -48 376 Left 0 !.ic v(bit1)=0.5 v(bit2)=0.5
TEXT -344 504 Left 0 ;Note WL and Write voltages are \nat 1.5 V to fully turn-on the devices.
TEXT 344 672 Left 0 ;Erase