Version 4
SHEET 1 880 680
WIRE 192 208 32 208
WIRE 336 208 272 208
WIRE 400 208 336 208
WIRE 432 208 400 208
WIRE 336 240 336 208
WIRE 32 272 32 208
WIRE 32 384 32 352
WIRE 224 384 32 384
WIRE 288 384 288 304
WIRE 288 384 224 384
WIRE 336 384 336 320
WIRE 336 384 288 384
WIRE 384 384 384 304
WIRE 384 384 336 384
WIRE 432 384 384 384
WIRE 224 400 224 384
FLAG 224 400 0
FLAG 400 208 AUS
SYMBOL AMScells\\n4 384 256 R90
SYMATTR InstName U1
SYMATTR SpiceLine wu=20  lu=20
SYMBOL voltage 32 256 R0
WINDOW 123 24 114 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName VGS
SYMATTR Value 1
SYMATTR Value2 AC 1 0
SYMBOL res 288 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10meg
TEXT -32 456 Left 2 !.include C:/programs/LTspiceIV/lib/sub/AMSlev49.sub
TEXT -24 416 Left 2 !.ac dec 9 1 10meg