+ Post New Thread
Results 1 to 4 of 4
  1. #1
    Member level 5
    Points: 835, Level: 6

    Join Date
    Oct 2017
    Posts
    87
    Helped
    1 / 1
    Points
    835
    Level
    6

    Filter topology anyone knows

    Hi All,

    Anyone could let me know what topology or how the filter posted works?.

    Attachment 157850

    Thanks

    •   AltAdvertisement

        
       

  2. #2
    Super Moderator
    Points: 54,156, Level: 56

    Join Date
    Apr 2011
    Location
    Minneapolis, Minnesota, USA
    Posts
    13,201
    Helped
    2628 / 2628
    Points
    54,156
    Level
    56

    Re: Filter topology anyone knows

    It looks as though mains AC comes in at left. And I think it filters power to an appliance at right. I'm reminded of a store-bought 'noise filter' which I took apart. It claimed to improve radio and tv reception as well as reduce hum coming through my audio equipment. Inside I found a capacitor and coil of fine wire. Not too complicated. Maybe it even worked, though I don't recall it made that much difference.

    Your schematic is more complicated of course. It has similar components and they're arranged in a fashion to function as a filter.



    •   AltAdvertisement

        
       

  3. #3
    Advanced Member level 5
    Points: 15,461, Level: 30
    schmitt trigger's Avatar
    Join Date
    Apr 2013
    Posts
    2,574
    Helped
    822 / 822
    Points
    15,461
    Level
    30

    Re: Filter topology anyone knows

    Ckicking the attachment gives an "Invalid Attachment" error
    My batteries are recharged by "Helpful Post" ratings.
    If you feel that I've helped you, please indicate it as a Helpful Post



    •   AltAdvertisement

        
       

  4. #4
    Member level 5
    Points: 835, Level: 6

    Join Date
    Oct 2017
    Posts
    87
    Helped
    1 / 1
    Points
    835
    Level
    6

    Re: Filter topology anyone knows

    sorry I will post it again.

    Click image for larger version. 

Name:	Capture.PNG 
Views:	8 
Size:	10.6 KB 
ID:	157856

    - - - Updated - - -

    Hi All,

    I have a flyback converter topology which is powering up a number of LEDs, it has also got a filter stage which is doing the job but at 100kHz. It has got a huge spike at that certain frequency. I wonder if by just putting at the very front a low pass filter with a cut off frequency of 10kHZ it would be attenuated?.

    Thanks,
    Winsu



--[[ ]]--