At 10:18 AM 2/28/02 -0600, Michael wrote: > > michael brown wrote: > > >This may sound like a dumb question, but I have not run across a good > > >"plain > > >English" description of low-pass [...] > > > > A time-varying signal can be represented as a function of time, f(t). > > The same function can be represented in "frequency space" via a linear > > > > > Hm, this isn't really "plain English" is it? Try again. > >Not to me, it pretty much reads like the rest of the "explanations" I've >seen. ;-) A low-pass filter is simply a moving-average in a sampled data system. An analog system is continuous, so you have to visualize an infinite number of infinitesimal pieces going into the moving-average. In this case, the moving-average is called an "integral" and the process of adding up the infinite number of pieces is called "integration". ================================================================ Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: ral@lcfltd.com Least Cost Formulations, Ltd. URL: http://lcfltd.com/ 824 Timberlake Drive Tel: 757-467-0954 Virginia Beach, VA 23464-3239 Fax: 757-467-2947 "Vere scire est per causas scire" ================================================================ -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.