[SI-LIST] Re: Decoupling capacitors
- From: Scott McMorrow <scott@xxxxxxxxxxxxx>
- To: raymond.anderson@xxxxxxx
- Date: Mon, 27 May 2002 15:10:13 -0700
>
>
>For example, say you are interested in effects up to 1 GHz on an
>FR-4 board. The equivalent wavelength then would be (3e8/1000MHz)/sqrt(4)
>or 150 cm. 1/10 of 150cm is 15 cm, so on a board whose size is say
>300cm x 300cm you would ideally want a mesh of about 20x20 for maximum
>accuracy. (if I haven't messed up the math :)
>
>
>
Ray, that should be 150 mm, not 150 cm. The 1/10 wavelength mesh would
be 15 mm per square, or 590 mils per square. So for a 300 mm x 300 mm
(about 12 in x 12 in) board the ideal mesh for 1 GHz bandwidth would be
20 x 20.
The result is still the same. ( A 300cm x 300cm board would be pretty
darn big!)
best regards,
scott
--
Scott McMorrow
Teraspeed Consulting Group LLC
2926 SE Yamhill St.
Portland, OR 97214
(503) 239-5536
http://www.teraspeed.com
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
