Version 4
SHEET 1 880 680
WIRE 208 32 208 0
WIRE 208 144 208 112
WIRE 32 224 -48 224
WIRE 160 224 112 224
WIRE 208 272 208 240
FLAG -384 272 0
FLAG -288 272 0
FLAG -288 192 Vin
FLAG -48 224 Vin
FLAG -384 192 Vdd
FLAG 208 0 Vdd
FLAG 208 272 0
SYMBOL nmos 160 144 R0
WINDOW 0 56 32 Invisible 0
WINDOW 3 56 72 Invisible 0
SYMATTR InstName M1
SYMATTR Value BSS123
SYMBOL voltage -288 176 R0
WINDOW 0 24 16 Invisible 0
WINDOW 3 52 126 VLeft 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value PULSE(0V 15V 10ms 1us 1us 10ms 20ms)
SYMBOL voltage -384 176 R0
WINDOW 0 24 16 Invisible 0
WINDOW 3 -26 61 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value +15V
SYMBOL res 128 208 R90
WINDOW 0 0 56 Invisible 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 1Meg
SYMBOL res 192 16 R0
SYMATTR InstName Rload
SYMATTR Value 1K
TEXT -416 376 Left 0 !.tran 100ms
TEXT 216 192 Left 0 ;nMOS