Dear Tsubota-san Please do you have a data sheet on the Proadlizer? If not we would be grateful for some answers to the questions from Mr Bart Bouma. Best wishes Geoff ______________________________________________ Geoff Stokes Applications Engineer, Signal Management Group Zetex plc Lansdowne Road, Chadderton, Oldham, OL9 9TY, UK Tel direct: +44-161-622-4857 Switchboard: +44-161-622-4444 Fax: +44-161-622-4469 http://www.zetex.com <http://www.zetex.com/> e-mail: gstokes@xxxxxxxxx -----Original Message----- From: Bart Bouma [mailto:bart.bouma@xxxxxxxxx] Sent: 13 January 2004 10:31 To: Geoff Stokes Cc: si-list@xxxxxxxxxxxxx; si-list-bounce@xxxxxxxxxxxxx Subject: Re: [SI-LIST] Re: Proadlizer - new decap? Hi Geoff, my guess is it's not 1pH. but 1nH. Obtaining 1pH seems impossible to me, even with e.g. IDC- and X2Y-caps, which incorporate magnetic flux cancelation, one doesn't obtain such low values. These typically have ESL-values of 50 upto 100pH. I assume (....) this Proadlizer is a new development low-esr polymer capacitor (like Nec-Tokin's tantalum Neocapacitor with conductive polymer cathode). It probably is in a compact, having a low profile, package offering lower ESL-values than standard tantalum-caps do. Standard Tantalums offer typical ESL values of 2.0 - 2.5 nH (case size D) In this context 1nH can be considered a low ESL-value, certainly when offering a capacitance of 200uF. regards, Bart www.yageo.com ============================================================ I found this and only this, after searching a while for descriptive info: http://www.nec-tokin.com/english/top/news.cgi?mode=body&id=14 For once, Google did not help! My guess is it's not really a conventional 2-terminal capacitor. By analogy with 4-terminal resistors with Kelvin connections, there are devices which can give you very low ESL (1pH claimed in this case). But they are really filters with 3 or more terminals. The RF community has long used discoidal feed-thro capacitors for GHz decoupling, which are best seen as 3 terminal devices. The ground connection around the edge of the disc is possibly the lowest common impedance ever (that is the amplitude of Z12 for network enthusiasts). But no such device can produce such a low driving-point impedance at a single port (Z11) without impractical dimensions. > -----Original Message----- > From: Mark Alexander [mailto:mark.alexander@xxxxxxxxxx] > Sent: 12 January 2004 22:48 > To: si-list@xxxxxxxxxxxxx > Subject: [SI-LIST] Proadlizer - new decap? > > > Hey all, > > On the subject of new capacitor technologies, does anyone have > information on NEC's Proadlizer? Apparently the name is a > contraction > of Prompt, Broadband Stabilizer. I can't find much press on it. > > -mark > > > > ------------------------------------------------------------------ > 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 technical documents are available at: > http://www.si-list.org > > 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 > > _________________________________________________________ Zetex Semiconductors - Solutions for an analog world EID Award Winners for 'Best Use of Technology' 2003 for the AcoustarTM ZXCW8100 End-to-End Digital Audio Amplifier Controller http://www.zetex.com _________________________________________________________ ###################################################################### E-MAILS are susceptible to interference. 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