From: sleeper75se (sleeper75se_at_yahoo.se)
Date: 2002-03-13 09:03:30
Hi all,
this message is mostly for Jim Meissner, but everyone is welcome to
comment on it, that is why I am posting it here.
I have uploaded a new schematic only showing the power system of the
high resolution EEG. Please tell me what you think. Have I gone
completely overboard with this? I am aiming for "cell-phone
immunity" ...
I estimate that the total attenuation of HF signals is around 80-
100dB in the 100kHz-1GHz range
By the way, you'll have to wind your own inductors, because there are
a million manufacturers out there and all of them use different PCB-
footprints. I hope that's ok with you.
http://groups.yahoo.com/group/buildcheapeeg/files/hardware%
20design/HiresEEG/
Some links mentioned in the schematics:
Three terminal capacitor filter datasheet. (See page 3, NFM4516P)
http://www.elfa.se/pdf/65/06561302.pdf
Ferrite materials quick reference:
http://www.bytemark.com/products/ferrmat.htm
Regards,
Andreas
This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:40 BST