> The point is, I do not find gates capable to work well beyond 30, 40 > MHz. I there somebody having a helpful idea how this could be solved?
How fast do you want to go? Modern FPGAs are loafing at 100 MHz. A major problem at high speeds is signal integrity. You can't toss something together with proto-board technology. You need a good ground plane and power supply decoupling. (and they generally require several power supplies) If you want to get started with FPGAs, the Spartan-3 starter kit at $100 is a pretty good package. You can get it from Xilinx or Digilent http://www.digilentinc.com/info/S3BOARD.cfm It's got a 50 MHz osc. (Beware, the connectors around the edge don't have enough ground pins for serious high speed work.) Peter Alfke, chief apps wizard at Xilinx, has made a hobby out of using FPGAs for things like measuring pulse duration and/or frequency. He's posted several neat ideas on comp.arc.fpga over the years. They may be hard to find - "counter" is a popular term. The latest trick that I remember is to use the high-speed SERDES logic on newer chips to sample a raw signal. You get 20 bits in parallel with a sample rate of 2 GHz. Then slower logic can count the transitions or whatever. Message-ID: <[EMAIL PROTECTED]> -- The suespammers.org mail server is located in California. So are all my other mailboxes. Please do not send unsolicited bulk e-mail or unsolicited commercial e-mail to my suespammers.org address or any of my other addresses. These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
