Version 4
SHEET 1 880 680
WIRE 464 48 224 48
WIRE 288 128 176 128
WIRE 464 128 400 128
WIRE 224 144 224 48
WIRE 176 160 176 128
WIRE 192 160 176 160
WIRE 288 176 288 128
WIRE 288 176 256 176
WIRE 336 176 288 176
WIRE 192 192 96 192
WIRE 464 208 224 208
WIRE 208 272 96 272
WIRE 336 272 336 256
WIRE 336 272 208 272
FLAG 208 272 0
FLAG 400 128 0
SYMBOL voltage 96 176 R0
WINDOW 3 -109 -19 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value SINE(10 10 100)
SYMATTR InstName V1
SYMBOL res 320 160 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL LM324 224 112 R0
WINDOW 3 -46 117 Left 2
SYMATTR InstName U1
SYMBOL voltage 464 32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 37 56 Left 2
SYMATTR InstName V2
SYMATTR Value 25
SYMBOL voltage 464 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 0 40 47 Left 2
SYMATTR InstName V4
SYMATTR Value 5
TEXT 48 72 Left 2 !.tran 20m