Version 4
SHEET 1 1200 680
WIRE 64 -160 -16 -160
WIRE 352 -160 128 -160
WIRE -144 -16 -336 -16
WIRE -16 -16 -16 -160
WIRE -16 -16 -64 -16
WIRE 64 -16 -16 -16
WIRE 352 -16 352 -160
WIRE 352 -16 144 -16
WIRE -336 32 -336 -16
WIRE 240 144 128 144
WIRE 128 176 128 144
WIRE -16 192 -16 -16
WIRE 96 192 -16 192
WIRE 352 208 352 -16
WIRE 352 208 160 208
WIRE 384 208 352 208
WIRE -144 224 -192 224
WIRE 96 224 -64 224
WIRE 128 304 128 240
WIRE 240 304 240 144
WIRE 128 416 128 384
WIRE 240 416 240 384
FLAG 240 416 0
FLAG -192 224 0
FLAG -336 112 0
FLAG 384 208 out
IOPIN 384 208 Out
FLAG 128 416 0
FLAG -336 -16 in
SYMBOL voltage 240 288 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage 128 288 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value -5
SYMBOL res -48 -32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 400
SYMBOL voltage -336 16 R0
WINDOW 3 -88 138 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(-0.1 0.1 0 10ns 10ns 0.5us 1us)
SYMATTR InstName V3
SYMBOL cap 128 -176 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 1p
SYMBOL res 160 -32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL res -160 240 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R3
SYMATTR Value 100
SYMBOL Robertugo\\OPAMP5 128 144 R0
SYMATTR InstName U1
SYMATTR SpiceModel AD8027
TEXT -416 -160 Left 0 !.tran 0 10u 0 10n
TEXT -416 -208 Left 0 ;.include ad8027helmut.sub
TEXT -416 -592 Left 0 ;The model ad8027helmut.sub contains two workarounds for problems of the AD8027 model.\n \nThis line has to be changed in the model ad8027.cir.\n*@@ Wrong sign?, Helmut\n*** ib4 81 99 1e-3\nib4 81 99 -1e-3\n \n*@@ workaround : bypass the stage above, connect to 31 instead of 42\ng51 99 331 31 0 1u\ng61 331 50 0 31 1u\n*g51 99 331 42 0 1u\n*g61 331 50 0 42 1u
TEXT 48 88 Left 0 ;Symbol "opamp2" used.