Version 4.1
SHEET 1 2152 756
WIRE 256 160 80 160
WIRE 320 160 256 160
WIRE 496 160 400 160
WIRE 512 160 496 160
WIRE 608 160 512 160
WIRE 608 176 608 160
WIRE 80 224 80 160
WIRE 512 240 512 160
WIRE 608 272 608 256
WIRE 80 352 80 304
WIRE 512 352 512 304
WIRE 512 352 448 352
WIRE 608 352 608 336
WIRE 608 352 512 352
WIRE 448 368 448 352
FLAG 80 352 0
FLAG 448 368 0
FLAG 256 160 Vin
FLAG 496 160 Vout
SYMBOL cap 528 240 M0
SYMATTR InstName C1
SYMATTR Value 1µF
SYMBOL voltage 80 208 R0
SYMATTR InstName V1
SYMATTR Value AC 1.
SYMBOL ind 416 144 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName L1
SYMATTR Value 10µH
SYMATTR SpiceLine Rser=1m
SYMBOL res 592 160 R0
SYMATTR InstName R1
SYMATTR Value 3R
SYMBOL cap 592 272 R0
SYMATTR InstName C2
SYMATTR Value 3µF
TEXT 776 -64 Left 2 ;click on run\nthen click on Vout
TEXT -16 -144 Left 5 ;LC cct., frequency response.
TEXT 64 432 Left 2 !.ac dec 100 1 1Meg
TEXT 768 96 Left 2 ;this plots the freq response Vout/Vin.\nthis circuit is a low pass filter, \nit passes anything below about 50khz.\nanything above this is attenuated.\n \nlooking at the slope of the graph,\nthe attenuation increases at 40dbs/decade,\nthis is twice as steep as the RC filter in \nthe earlier circuit.\nThis LC filter has a slight increase in output \n(at 30khz) before it attenuates\nif you remove the damper this increase gets \nconsiderably bigger.
TEXT 776 -104 Left 4 ;Instructions
TEXT 776 24 Left 4 ;Description