Talk:Ferrite bead
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[edit] Poor, Confusing, Bad article
I have no time now to improve it and I wonder why nobody cares. Neonil 13:52, 23 April 2007 (UTC) IMO ferrite beads is one of the most significant discoveries in electronics in recent 20 years but still nobody can tell anything except high end analog or power supply gurus. Do I really have to write this article? Neonil 13:55, 23 April 2007 (UTC)
- I don't know about the discovery of these being in the last 20 years, but they have only become greatly necessary recently, as generally circuits below 4mhz don't need them as much. Higher frequency circuits need them a lot more. Also, note that the picture here is not technically a "bead" -- it is too big. I've seen ferite beads and cores used in two ways:
- Beads on small wires intended to carry DC input or output will block high frequency RF noise from traveling past the bead. Typically, low frequency and DC lines coming off of high frequency circuits use beads like this.
- Large beads and ferrite cores on coax cables prevent high frequency RF signals from using the shield of the coax as an antenna, allowing only balanced signals between the shield and center conductor to flow. (See also balun.) This is what is in the picture. (Note: when I first typed this, the picture was clearly a balun. Now it is a better picture that could be considered a large bead that is also a balun.)
(I've moved the list of related articles into the article.) Maybe someone else can expand on these and add them to this article, or merge this article with some of the above links. --ssd 14:58, 12 August 2007 (UTC)
Disagree with merging this topic.windsun
