Version 4
SHEET 1 2580 1112
WIRE 64 96 -32 96
WIRE 192 96 144 96
WIRE 80 176 80 160
WIRE -128 192 -176 192
WIRE -32 192 -32 96
WIRE -32 192 -48 192
WIRE 48 192 -32 192
WIRE 192 208 192 96
WIRE 192 208 112 208
WIRE 208 208 192 208
WIRE 48 224 -32 224
WIRE -32 256 -32 224
WIRE 80 256 80 240
WIRE 208 288 208 272
WIRE 304 288 304 272
WIRE -32 352 -32 336
WIRE 208 384 208 368
WIRE 304 384 304 368
FLAG 304 384 0
FLAG 208 384 0
FLAG 208 272 +V
FLAG 304 272 -V
FLAG -32 352 0
FLAG 80 160 +V
FLAG 80 256 -V
FLAG -176 192 0
FLAG 208 208 out
SYMBOL voltage 208 272 R0
WINDOW 3 -15 61 Left 0
SYMATTR InstName V+
SYMATTR Value 2.5
SYMBOL voltage 304 272 R0
WINDOW 3 -21 61 Left 0
SYMATTR InstName V-
SYMATTR Value -2.5
SYMBOL voltage -32 240 R0
WINDOW 0 -15 59 Left 0
WINDOW 3 27 90 Left 0
WINDOW 123 27 118 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vs
SYMATTR Value SINE(0 .1 1k)
SYMATTR Value2 AC 1
SYMBOL res 48 112 R270
WINDOW 0 16 6 VTop 0
WINDOW 3 43 110 VBottom 0
SYMATTR InstName R1
SYMATTR Value 90k
SYMBOL res -144 208 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL Robertugo\\OPAMP5 80 144 R0
WINDOW 0 -25 64 Left 0
WINDOW 38 4 24 Left 0
SYMATTR InstName U2
SYMATTR SpiceModel MCP6231
TEXT 216 80 Left 0 !.ac oct 10 .1 100Meg
TEXT -216 416 Left 0 ;http://ww1.microchip.com/downloads/en/DeviceDoc/MCP6231_MM_B.txt
TEXT 216 104 Left 0 ;.tran 0 10m 0 10u
TEXT 216 128 Left 0 !.options plotwinsize=0