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22nd February 2006
| #1 |
| Registered User  Joined: May 2005 Location: Winter Park, FL
Posts: 11
Thread Starter | A Passive 500Hz Filter
Can anybody help me find schematics or anything on how to construct a 500Hz narrow band filter. Thanks |
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22nd February 2006
| #2 |
| Moderator  Joined: Jun 2002 Location: New Zealand
Posts: 2,410
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I assume you mean a notch filter at 500Hz, what is the application? It can be done, if it has to be passive then you need to know; 1] The source impedance 2] The load impedance 3] Depth of notch 4] Width of notch or bandwidth 5] Acceptable pass band loss An active filter would be easier! Cheers Tim. |
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22nd February 2006
| #3 |
| Gear Guru  Joined: Jul 2004 Location: Orygun
Posts: 10,230
| Passive notch filters are tough.... A state-variable filter would be the best aproach. -tINY |
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22nd February 2006
| #4 |
| Gear Guru  Joined: Oct 2002 Location: New Milford, CT, USA
Posts: 12,333
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Hautzy, > Can anybody help me find schematics or anything on how to construct a 500Hz narrow band filter. < Narrow is tough to do passively, as tINY said. Here are schematics for simple filters on my personal site: www.ethanwiner.com/gadgets.html --Ethan
__________________ Ethan's audio book is now available! |
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25th February 2006
| #5 |
| Lives for gear  Joined: Dec 2004 Location: Northern New Jersey
Posts: 562
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If you know the values that Tim mentioned above, you can design your own at this site: http://www-users.cs.york.ac.uk/~fisher/lcfilter/ Paul |
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