I remember going over this in the DC circuits class. The discussion covered naming conventions in specifications, though: vOH, tAC, VDD, etc. In each of these, the case, upper/lower, of the first letter indicated the parameter as AC/DC, respectively. In regard to the word I've seen it both ways, but I think capitalization is correct when it is named after a person. I also notice in Nilsson's 'Electric Circuits' that he has the letter capitalized whether AC or DC: 5V, 3A, 2W, etc. Best Regards, John Thomas -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Doug Winterberg Sent: Friday, April 04, 2003 3:25 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: Language conventions I seem to remember from my college text books that it mattered if you were talking about AC or DC voltages/currents/etc. Capitalized letters meant you were talking about DC values and non-capitalized letters meant AC values. -Doug Doug Winterberg Senior Hardware Engineer Celestica Design Center 9 NE Blvd, Salem, NH 03079 Doug Brooks <doug@xxxxxxxxxx> Sent by: si-list-bounce@xxxxxxxxxxxxx 04/04/2003 04:06 PM Please respond to doug To: si-list@xxxxxxxxxxxxx cc: (bcc: Doug Winterberg/CNE/Celestica) Subject: [SI-LIST] Language conventions Hi all, I need some help in settling a misunderstanding among some people. It involves when to capitalize and not capitalize Volt, Amp, and Watt, etc. In the following uses, is it proper to capitalize the letters as shown: The voltage is one Volt, which we can also write as 1 V. The current is 10 Amps, but other places it is only 5 mA. The definition of one Amp is the flow of.......... The power generated is 5 Watts. But I only have a 2-Watt power supply. When do we capitalize and when don't we? Doug Brooks ____________________________________________________________________________ ___ UltraCAD Design announces availability of its new book "Signal Integrity Issues in PCB Design" Details at www.ultracad.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 ------------------------------------------------------------------ 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 -- Binary/unsupported file stripped by Ecartis -- -- Type: text/x-vcard -- File: John Thomas (E-mail).vcf ------------------------------------------------------------------ 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