Author: Robert Hyatt
Date: 17:43:16 05/27/99
Go up one level in this thread
On May 27, 1999 at 11:35:28, Christophe Theron wrote: >On May 26, 1999 at 23:33:43, Robert Hyatt wrote: > >>On May 26, 1999 at 20:35:05, Christophe Theron wrote: >> >>>On May 26, 1999 at 13:57:08, Robert Hyatt wrote: >>> >>>>On May 26, 1999 at 13:36:06, Dann Corbit wrote: >>>> >>>>>On May 26, 1999 at 12:38:05, Charles Unruh wrote: >>>>> >>>>>>Will such chips have special housings? >>>>>No, but they'll come with a free voucher for cataract surgery. >>>>>;-) >>>> >>>> >>>>Also if you set a russet potato down by the case, in 5 minutes you >>>>will have a baked potato. :) >>>> >>>>A couple of serious points... >>>> >>>>1. No one knows what is going to happen at 1ghz yet. One thing that >>>>has been seen is 'atom migration' where at such frequencies, material on >>>>the chip physically moves around. The effect on ICs is unknown at present. >>>> >>>>2. HAM radio folks know (as do those having had a physics course that covers >>>>electricity and magnetism) that at 1ghz frequencies, electrical properties >>>>change significantly (ie check out coax cable used for normal RF frequencies >>>>rather than the waveguides used for microwave frequencies). What happens inside >>>>at these frequencies is going to be interesting to find out. Ie yes it _can_ >>>>be done, but _do_ we really want to do it? :) >>>> >>>>That was one of many issues that prevented Seymour Cray from producing a 1ghz >>>>machine before his death. 1ghz is _tough_. And 2 ghz is _really tough_. >>> >>>What about problems with the GSM cellular phones frequencies? >>> >>>Standard GSM uses 128 frequencies in the range 890-915MHz, and 935-960MHz (close >>>to 1GHz), and in the USA frequencies around 1.8GHz are used too. >>> >>> >>> Christophe >> >> >>whatis missing is that you don't find .18 micron stuff in a cellular phone. >>small gates have interesting problems. Have seen a couple of interesting papers >>on this problem of 'molecular mobility' and its effects on IC semiconductors. >>Nothing said it is a killer problem, but nothing says it can be ignored either. >>This will be interesting to watch. > >Oh, you are right. > >But I was only talking about interferences between fast computers and the >cellular phone network. I was wondering if this could be a serious problem in 3 >or 4 years, when we will all have near-1GHz computers. > > > Christophe No doubt. I was a long-time HAM radio fanatic, and also still fly radio- controlled models. In the middle 80's I was building my R/C gear (from a kit supplier named "ACE Radio Controls"... and I would often take a transmitter/receiver in to my office and try to align them using a good Tektronix scope I had. And with our VAX at least 100 feet from my office, it produced enough RF to make alignment impossible. I used to have a program I could run that would play music on an FM radio set on top of the CPU cabinet. I'll bet money that a 1ghz computer and a cellular phone will have a _lot_ to say to each other. :)
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.