Version 4
SHEET 1 880 680
WIRE -176 96 -208 96
WIRE -112 96 -176 96
WIRE 0 96 -32 96
WIRE 352 96 0 96
WIRE 480 96 352 96
WIRE 592 96 560 96
WIRE 656 96 592 96
WIRE -208 128 -208 96
WIRE 0 144 0 96
WIRE 592 144 592 96
WIRE -208 240 -208 208
WIRE 0 240 0 224
WIRE 0 240 -208 240
WIRE 592 240 592 224
WIRE 592 240 0 240
WIRE 656 240 592 240
WIRE 656 256 656 240
FLAG 656 256 0
FLAG 656 96 Vc
FLAG 352 96 Vb
FLAG -176 96 Va
SYMBOL voltage -208 112 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 80 R90
WINDOW 0 0 56 Invisible 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL res -16 240 M180
WINDOW 0 36 76 Invisible 0
WINDOW 3 42 54 Left 0
SYMATTR InstName R2
SYMATTR Value 2K
SYMBOL res 576 80 R90
WINDOW 0 0 56 Invisible 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 1K
SYMBOL res 576 240 M180
WINDOW 0 36 76 Invisible 0
WINDOW 3 40 57 Left 0
SYMATTR InstName R4
SYMATTR Value 2K
TEXT -296 360 Left 0 !.tran 20ms
TEXT -296 400 Left 0 !.lib opamp.sub