Version 4
SHEET 1 1280 772
WIRE 656 -160 656 -192
WIRE 768 -160 656 -160
WIRE 992 -160 848 -160
WIRE 656 -32 656 -160
WIRE 784 -32 656 -32
WIRE 992 -16 992 -160
WIRE 992 -16 848 -16
WIRE 1040 -16 992 -16
WIRE -32 0 -288 0
WIRE 96 0 48 0
WIRE 160 0 96 0
WIRE 304 0 240 0
WIRE 384 0 304 0
WIRE 512 0 384 0
WIRE 784 0 592 0
WIRE -288 48 -288 0
WIRE 1040 112 1040 -16
WIRE 96 144 96 0
WIRE 160 144 96 144
WIRE 304 160 304 0
WIRE 304 160 224 160
WIRE 160 176 96 176
WIRE 1040 224 1040 112
WIRE -144 288 -288 288
WIRE -32 288 -144 288
WIRE 96 288 96 176
WIRE 96 288 48 288
WIRE 192 288 96 288
WIRE 192 320 192 288
WIRE -288 336 -288 288
WIRE 1040 416 1040 304
WIRE -288 672 -288 640
WIRE -64 672 -64 640
FLAG 192 192 0
FLAG -288 752 0
FLAG -64 752 0
FLAG -64 640 V+
FLAG 192 128 V+
FLAG -288 128 0
FLAG -288 416 0
FLAG -288 640 VREF
FLAG 192 400 VREF
FLAG 656 -272 VREF
FLAG 816 16 0
FLAG 816 -48 V+
FLAG 1040 416 0
FLAG 384 0 OUT1
FLAG -144 288 IN1
FLAG 1040 112 OUT2
SYMBOL OpAmps\\OP495 192 96 R0
WINDOW 0 26 -4 Left 2
WINDOW 3 26 23 Left 2
SYMATTR InstName U1
SYMBOL res 64 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res 256 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1Meg
SYMBOL res 64 272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 1Meg
SYMBOL res 176 304 R0
SYMATTR InstName R4
SYMATTR Value 1Meg
SYMBOL voltage -64 656 R0
WINDOW 0 45 19 Left 2
WINDOW 3 46 47 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -288 32 R0
WINDOW 3 40 41 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 40 69 Left 2
SYMATTR InstName V2
SYMATTR Value 1
SYMATTR SpiceLine Rser=1
SYMBOL voltage -288 320 R0
WINDOW 3 40 41 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value SINE(1.01 0.01 1k)
SYMBOL voltage -288 656 R0
WINDOW 0 34 21 Left 2
WINDOW 3 34 48 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 34 76 Left 2
SYMATTR InstName V4
SYMATTR Value 2.5
SYMATTR SpiceLine Rser=1
SYMBOL res 864 -176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL res 672 -176 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R6
SYMATTR Value 2.7k
SYMBOL OpAmps\\OP495 816 -80 R0
SYMATTR InstName U2
SYMBOL res 1024 208 R0
SYMATTR InstName R8
SYMATTR Value 10k
SYMBOL res 608 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 10k
TEXT -288 512 Left 2 !.tran 0 2e-3 0 2e-6
LINE Normal 640 128 640 64 2
LINE Normal 640 128 640 128 2
LINE Normal 640 128 640 128 2
LINE Normal 672 144 672 144 2
LINE Normal 640 272 640 192 2
LINE Normal 640 272 640 272 2
LINE Normal 688 144 640 192 2
LINE Normal 656 272 624 272 2
LINE Normal 640 288 656 272 2
LINE Normal 624 272 640 288 2
LINE Normal 624 272 624 272 2
LINE Normal 640 0 640 64 2
LINE Normal 640 0 640 0 2
RECTANGLE Normal 720 352 576 64 2