welllll, I borrowed the Pressman book from one of the design engineers, and it seems to indicate that a decoupling action is, in fact, a hi-Z action.
Is it semantics, or do we have a fundamental failure of terminology ? R/S, Brian > -----Original Message----- > From: [email protected] [mailto:[email protected]]On Behalf Of John > Woodgate > Sent: Wednesday, April 16, 2008 9:39 AM > To: [email protected] > Subject: Re: Bypass and decoupling capacitor definitions. > > > In message <[email protected]>, > dated Wed, > 16 Apr 2008, Brian O'Connell <[email protected]> writes: > > >In my opinion, the terms should not be interchangeable, and should > >indicate different actions/properties. A bypass will shunt the bad > >signal, so is a lo Z. A decouple is to isolate, so should > be a higher Z > >to the bad stuff. > > No; both must present a LOW impedance to the unwanted currents. > -- > OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk > Murphy's Law has now been officially re-named The Certainty Principle > John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK > > - > --------------------------------------------------------------- - > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] > Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] > David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > > - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
