Active 2nd order analog lowpass filter in a feedthrough module SCC-FT01.

[caccia]

I would like to build an active 2nd order lowpass filter with cutoff frequency of 4000Hz in a feedthrough module SCC-FT01 for antialiasing purposes. Since I am not an electronic expert, I would like some advice on which components I can use (and how I can dimension them) and on how I can connect them on the module board.

[PNHorn]

Caccia,

I would recommend that you build an external box with your filter in if you require hardware filtering. The feedthrough panel FT01 is just a piece of wire really with connections on each end, so there isn't room to build a filter in there.

Unfortunetly I can't really recommend what components to use, but there are lots of websites and books out there that you could use to help you, none of them specific to NI but that shouldn't matter.

After a quick search on Google I found the following website which seems to have a lot of information.

http://my.integritynet.com.au/purdic/lcfilters.htm

Hope this helps, please post again if you require any further information from me.

Regards,

Peter H
Applications Engineer
National Instruments