Hi Ferrite beads are wonderful things. I use them all the time.
For this application (main filtering between a TBolt and a switcher) - not a good place to use them. You don't get enough impedance at the switcher frequencies. There are better (and equally cheap) parts available. Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Monday, February 14, 2011 3:34 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Thunderbolt Supply Has anybody investigated simple L-C (R-L-C) filters rather than linear regulators? The SI-List recently announced a good paper on using ferrite beads. http://www.ipblox.com/papers.html (Currently, it's the top paper. In case somebody finds this in the archives, it's the one marked DesignCon 2011) Page 5 of the slides has the critical graph. A ferrite bead is resistive over a broad range of frequencies. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
