From: Frode Vatvedt Fjeld Newsgroups: comp.arch.fpga Subject: Clocks Date: 21 Feb 2001 17:24:33 +0100 Organization: University of Tromsų Lines: 13 Message-ID: <2hn1bg2eda.fsf@dslab7.cs.uit.no> NNTP-Posting-Host: dslab7.cs.uit.no Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: news.uit.no 982772514 21055 129.242.16.27 (21 Feb 2001 16:21:54 GMT) X-Complaints-To: usenet@news.uit.no NNTP-Posting-Date: 21 Feb 2001 16:21:54 GMT User-Agent: Gnus/5.0807 (Gnus v5.8.7) Emacs/20.7 Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news.ifi.unizh.ch!news.imp.ch!uni-erlangen.de!newsfeeds.belnet.be!news.belnet.be!news.tele.dk!128.39.3.166!uninett.no!news.uit.no!not-for-mail Xref: chonsp.franklin.ch comp.arch.fpga:4757 Having played around a bit with VHDL programming for FPGAs, the time has comed to try it out on real devices. Not being much of an electronics engineer, my first obstacle is how do I generate a clock signal? I have set up some simple clocks with an RC config and inverters, but I'm not confident this would work well for the MHz range. So, I'm looking for pointers to information on designing clock generators (suitable for driving FPGAs). What do you all use? Thanks, -- Frode Vatvedt Fjeld ###### From: Falk Brunner Newsgroups: comp.arch.fpga Subject: Re: Clocks Date: Wed, 21 Feb 2001 18:57:11 +0100 Organization: TU Dresden (URZ) Lines: 13 Message-ID: <3A940177.EA4E7050@gmx.de> References: <2hn1bg2eda.fsf@dslab7.cs.uit.no> NNTP-Posting-Host: x02r5b.wh5.tu-dresden.de Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 4.08 [de] (Win95; I) Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news.ifi.unizh.ch!news.imp.ch!uni-erlangen.de!news-nue1.dfn.de!news-lei1.dfn.de!news-fra1.dfn.de!news-ber1.dfn.de!news.urz.tu-dresden.de!not-for-mail Xref: chonsp.franklin.ch comp.arch.fpga:4763 Frode Vatvedt Fjeld schrieb: > > So, I'm looking for pointers to information on designing clock > generators (suitable for driving FPGAs). What do you all use? Simply go out and buy one. Just connect power to it and you will get a nice square wave out of it. Ranges from 32 kHz to 100MHz++. -- MFG Falk ###### From: Frode Vatvedt Fjeld Newsgroups: comp.arch.fpga Subject: Re: Clocks Date: 21 Feb 2001 19:08:51 +0100 Organization: University of Tromsų Lines: 15 Message-ID: <2hitm33o3w.fsf@dslab7.cs.uit.no> References: <2hn1bg2eda.fsf@dslab7.cs.uit.no> <3A940177.EA4E7050@gmx.de> NNTP-Posting-Host: dslab7.cs.uit.no Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: news.uit.no 982778772 21055 129.242.16.27 (21 Feb 2001 18:06:12 GMT) X-Complaints-To: usenet@news.uit.no NNTP-Posting-Date: 21 Feb 2001 18:06:12 GMT User-Agent: Gnus/5.0807 (Gnus v5.8.7) Emacs/20.7 Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news.ifi.unizh.ch!news.imp.ch!uni-erlangen.de!newsfeeds.belnet.be!news.belnet.be!news.tele.dk!128.39.3.166!uninett.no!news.uit.no!not-for-mail Xref: chonsp.franklin.ch comp.arch.fpga:4758 Falk Brunner writes: > Frode Vatvedt Fjeld schrieb: > > > So, I'm looking for pointers to information on designing clock > > generators (suitable for driving FPGAs). What do you all use? > > Simply go out and buy one. Just connect power to it and you will get > a nice square wave out of it. Ranges from 32 kHz to 100MHz++. Sounds very good. Could you name some example devices? I'm not quite sure which keywords to search for. -- Frode Vatvedt Fjeld ###### Message-ID: <3A94094D.D771434B@aracnet.com> From: eteam Reply-To: eteam@aracnet.com Organization: The E-Team X-Mailer: Mozilla 4.73 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 Newsgroups: comp.arch.fpga Subject: Re: Clocks References: <2hn1bg2eda.fsf@dslab7.cs.uit.no> <3A940177.EA4E7050@gmx.de> <2hitm33o3w.fsf@dslab7.cs.uit.no> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 33 Date: Wed, 21 Feb 2001 10:30:37 -0800 NNTP-Posting-Host: 198.102.179.71 X-Complaints-To: news@aracnet.com X-Trace: typhoon.aracnet.com 982780237 198.102.179.71 (Wed, 21 Feb 2001 10:30:37 PST) NNTP-Posting-Date: Wed, 21 Feb 2001 10:30:37 PST Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news.ifi.unizh.ch!news.imp.ch!psinet-eu-nl!newsfeeds.belnet.be!news.belnet.be!skynet.be!newsfeed.stanford.edu!feed.textport.net!typhoon.aracnet.com!not-for-mail Xref: chonsp.franklin.ch comp.arch.fpga:4749 manufacturers of self-contained crystal oscillators include: epson http://www.eea.epson.com/products/qd/qd.htm (north america site) fox http://www.foxonline.com/ citizen http://www.citizencrystal.com/ connor http://www.conwin.com/products/clock.html cts http://www.ctscorp.com/reeves/ ecs http://www.ecsxtal.com/ There are more, but this should get you started. In the future, try going to a distributor site like www.digikey.com, search for keywork "oscillator", and see what happens. -- Bob Elkind Frode Vatvedt Fjeld wrote: > > Falk Brunner writes: > > > Frode Vatvedt Fjeld schrieb: > > > > > So, I'm looking for pointers to information on designing clock > > > generators (suitable for driving FPGAs). What do you all use? > > > > Simply go out and buy one. Just connect power to it and you will get > > a nice square wave out of it. Ranges from 32 kHz to 100MHz++. > > Sounds very good. Could you name some example devices? I'm not quite > sure which keywords to search for. > > -- > Frode Vatvedt Fjeld