Version 4
SHEET 1 880 680
WIRE 160 -32 -240 -32
WIRE 320 -32 160 -32
WIRE 320 32 320 -32
WIRE 272 48 -128 48
WIRE 480 80 400 80
WIRE 544 80 480 80
WIRE 272 112 256 112
WIRE -240 160 -240 -32
WIRE -128 176 -128 48
WIRE -96 176 -128 176
WIRE -32 176 -96 176
WIRE 64 176 48 176
WIRE 96 176 64 176
WIRE 256 176 256 112
WIRE 256 176 176 176
WIRE 304 176 256 176
WIRE 384 176 304 176
WIRE 480 176 480 80
WIRE 480 176 464 176
WIRE -128 208 -128 176
WIRE 352 208 352 128
WIRE -240 304 -240 240
WIRE -128 304 -128 288
WIRE -128 304 -240 304
WIRE 352 304 352 288
WIRE 352 304 -128 304
WIRE -240 320 -240 304
FLAG 544 80 AUS
IOPIN 544 80 Out
FLAG -240 320 0
FLAG 160 -32 UDD
FLAG -96 176 REF
FLAG 64 176 UIN
FLAG 304 176 XX
SYMBOL current 352 208 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName IB
SYMATTR Value 10µ
SYMBOL OpaCtr 320 80 R0
SYMATTR InstName X1
SYMBOL voltage -128 192 R0
SYMATTR InstName AGND
SYMATTR Value 2.5
SYMBOL voltage -240 144 R0
SYMATTR InstName VDD
SYMATTR Value 5
SYMBOL res 192 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL res 480 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10Meg
SYMBOL voltage 64 176 R90
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 50 56 VTop 2
WINDOW 39 0 0 Left 2
SYMATTR InstName VIN
SYMATTR Value 0
SYMATTR Value2 AC 1 0
TEXT -176 0 Left 2 !.include C:/Programs/LTspiceIV/lib/sub/GFlev8.sub
TEXT -168 24 Left 2 !;dc VIN -25m 25m 1µ
TEXT -104 64 Left 2 !.ac dec 9 10 1g