Version 4
SHEET 1 880 680
WIRE 32 32 0 32
WIRE 144 32 112 32
WIRE -416 112 -448 112
WIRE -304 112 -336 112
WIRE -208 112 -304 112
WIRE -112 112 -208 112
WIRE 0 112 0 32
WIRE 0 112 -32 112
WIRE 32 112 0 112
WIRE -448 128 -448 112
WIRE -304 128 -304 112
WIRE 144 128 144 32
WIRE 144 128 96 128
WIRE 272 128 144 128
WIRE 384 128 272 128
WIRE 496 128 464 128
WIRE 656 128 496 128
WIRE 32 144 0 144
WIRE 496 144 496 128
WIRE -448 224 -448 208
WIRE -304 224 -304 208
WIRE -304 224 -448 224
WIRE 0 224 0 144
WIRE 0 224 -304 224
WIRE 496 224 0 224
WIRE 656 224 496 224
WIRE 656 240 656 224
FLAG 656 240 0
FLAG -448 112 Va
FLAG -208 112 Vb1
FLAG 272 128 Vb2
FLAG 656 128 Vc
SYMBOL Opamps\\opamp 64 64 R0
WINDOW 0 0 32 Invisible 0
SYMATTR InstName U1
SYMBOL voltage -448 112 R0
WINDOW 0 24 16 Invisible 0
WINDOW 3 -97 150 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 3V 1kHz)
SYMBOL res -16 96 R90
WINDOW 0 0 56 Invisible 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 1.5K
SYMBOL res 16 48 R270
WINDOW 0 32 56 Invisible 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R2
SYMATTR Value 1.5K
SYMBOL res -320 112 R0
WINDOW 0 36 40 Invisible 0
WINDOW 3 38 52 Left 0
SYMATTR InstName R3
SYMATTR Value 2K
SYMBOL res -320 96 R90
WINDOW 0 0 56 Invisible 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 1K
SYMBOL res 480 112 R90
WINDOW 0 0 56 Invisible 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R5
SYMATTR Value 1K
SYMBOL res 480 128 R0
WINDOW 0 36 40 Invisible 0
WINDOW 3 40 51 Left 0
SYMATTR InstName R6
SYMATTR Value 2K
TEXT -544 352 Left 0 !.tran 20ms
TEXT -544 384 Left 0 !.lib opamp.sub