Hi If you have a THz clock rate, what ever you are using for logic will be running "at the limit". The counter you implement would need to be a fundamentally fast design. That limits your options. Things like Gray code counters are inherently slower than ripple counters or Johnson counters.
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Eugen Leitl Sent: Thursday, April 15, 2010 7:42 AM To: [email protected] Subject: Re: [time-nuts] lunatic fringe time standards On Thu, Apr 15, 2010 at 07:30:27AM -0400, Bob Camp wrote: > Hi > > I'm not 100% sure I understand exactly what you are thinking about setting up. This is completely theoretical at this point. Just the required geometry size would be prohibitive. > My guess is that the counter needs to run at the same THz speed as > the oscillator. That's pretty fast. I suspect that what ever you use, > speed / propagation delay in the counter it's self will be an issue. > That will get you back to either a ripple counter or a Johnson counter. Wouldn't you get large errors when you caught a ripple during readout? That wouldn't be a problem with a Gray code. -- Eugen* Leitl <a href="http://leitl.org";>leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
