Version 4
SHEET 1 880 680
WIRE 240 -64 160 -64
WIRE 400 -64 240 -64
WIRE 240 32 240 16
WIRE 304 32 240 32
WIRE 320 32 304 32
WIRE 400 80 400 -64
WIRE 112 112 96 112
WIRE 160 112 160 16
WIRE 160 112 112 112
WIRE 192 112 160 112
WIRE 48 128 48 112
WIRE 160 160 160 112
WIRE 48 240 48 208
WIRE 160 240 48 240
WIRE 240 240 240 128
WIRE 240 240 160 240
WIRE 400 240 400 160
WIRE 400 240 240 240
WIRE 240 256 240 240
FLAG 240 256 0
SYMBOL nmos 192 32 R0
WINDOW 3 56 42 Left 2
SYMATTR InstName M1
SYMBOL res 224 -80 R0
SYMATTR InstName R1
SYMATTR Value 33k
SYMBOL voltage 400 64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL voltage 48 112 R0
WINDOW 123 -60 97 Left 2
WINDOW 39 -61 106 Left 2
WINDOW 3 -61 87 Left 2
SYMATTR Value2 AC 0.01
SYMATTR SpiceLine Rser=1
SYMATTR InstName V2
SYMATTR Value SINE(0 0.01 1000)
SYMBOL res 144 -80 R0
WINDOW 3 34 49 Left 2
SYMATTR InstName R2
SYMATTR Value 20000k
SYMBOL res 144 144 R0
WINDOW 3 35 49 Left 2
SYMATTR InstName R3
SYMATTR Value 10000k
SYMBOL cap 112 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 2.2µ
SYMBOL cap 368 16 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 2.2µ
TEXT 56 48 Left 2 !.tran 0 0.01 0 0.000001