Version 4
SHEET 1 900 680
WIRE 480 32 224 32
WIRE 224 128 224 32
WIRE 320 128 224 128
WIRE 480 144 480 32
WIRE 480 144 384 144
WIRE 496 144 480 144
WIRE 512 144 496 144
WIRE 320 160 304 160
WIRE 496 176 496 144
WIRE 752 224 656 224
WIRE -192 256 -208 256
WIRE 64 256 -192 256
WIRE 224 256 224 128
WIRE 224 256 128 256
WIRE 752 272 752 224
WIRE 304 304 304 160
WIRE 416 304 304 304
WIRE 496 304 496 256
WIRE 496 304 416 304
WIRE 656 304 496 304
WIRE 304 336 304 304
WIRE 304 336 -192 336
WIRE 416 352 416 304
WIRE 656 400 656 384
WIRE 752 400 752 352
WIRE 752 400 656 400
FLAG 512 144 Vout
FLAG -208 256 Vin
FLAG 752 224 Vp
FLAG 752 400 Vn
FLAG 352 112 Vp
FLAG 352 176 Vn
FLAG 416 352 0
SYMBOL Opamps\\LM324 352 80 R0
SYMATTR InstName U1
SYMBOL voltage 752 256 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR InstName V1
SYMATTR Value 3
SYMATTR SpiceLine Rser=100
SYMBOL res 640 208 R0
SYMATTR InstName Rvar
SYMATTR Value 57k
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 640 288 R0
SYMATTR InstName R6
SYMATTR Value 66k
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage -192 240 R0
WINDOW 3 24 152 Left 2
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 0.01 77.5k)
SYMATTR Value2 AC 0.001V
SYMBOL cap 64 272 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C1
SYMATTR Value 680p
SYMATTR SpiceLine V=10 Irms=0 Rser=0.009 Lser=0
SYMBOL res 480 160 R0
SYMATTR InstName Rload
SYMATTR Value 100k
TEXT -266 448 Left 2 !;tran 1
TEXT -128 448 Left 2 !.ac lin 1000 10k 100k