I read in !emc-pstc that cherryclo...@aol.com wrote (in <14b.7351131.297 42...@aol.com>) about 'EMC-related safety issues', on Mon, 14 Jan 2002: > I'm sure I said in my original posting on this example, that the HCMOS was > 'hard switching' and not producing a sine wave. A hot device was, of > course, > the first thing I looked for, and didn't find any. See the additional > information above. > Yes, you did, BUT I wrote: > > > > The absence of harmonics even suggests that this gate was producing a > > sine-wave, which makes the figures even higher and less credible.
The presence of the high-Q resonant structure that you describe is clearly the real reason why no harmonics were observed. It is not only a good antenna *but it very probably cannot radiate odd harmonics*, which should be the only ones present if the drive waveform was square. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk After swimming across the Hellespont, I felt like a Hero. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
