Version 4
SHEET 1 880 680
WIRE 320 -64 192 -64
WIRE 320 -16 320 -64
WIRE 192 16 192 -64
WIRE 96 112 16 112
WIRE 320 128 320 64
WIRE 192 144 192 96
WIRE 16 160 16 112
WIRE 256 192 192 192
WIRE 96 224 96 112
WIRE 144 224 96 224
WIRE 256 240 256 192
WIRE 256 240 192 240
WIRE 16 288 16 240
WIRE 256 304 256 240
FLAG 16 288 0
FLAG 256 304 0
FLAG 320 128 0
SYMBOL nmos4 144 144 R0
WINDOW 3 99 33 Left 2
SYMATTR InstName M2
SYMATTR Value2 l=2 w=100
SYMBOL voltage 16 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 2.75
SYMBOL voltage 320 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 6
SYMBOL res 176 0 R0
SYMATTR InstName R1
SYMATTR Value 900
TEXT -18 328 Left 2 !;op
TEXT 32 328 Left 2 !.tran 20u