home bbs files messages ]

Forums before death by AOL, social media and spammers... "We can't have nice things"

   sci.optics      Discussion relating to the science of op      12,750 messages   

[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]

   Message 11,610 of 12,750   
   John Devereux to John Devereux   
   Re: Simple lock-in design for Oz-type me   
   25 Jan 14 20:32:03   
   
   From: john@devereux.me.uk   
      
   John Devereux  writes:   
      
   > haiticare2011@gmail.com writes:   
   >   
   >> Hi George,   
   >> You must understand, I am bringing to this conversation about the   
   intelligence of a house fly.   
   >> I am merely looking at what Horowitz says in Art of Electronics around page   
   1027 et seq.   
   >> And I see, gee whiz, the signal emerges after just adding many   
   >> measurements. And I feel like the native confronted by an explorer who   
   >> flicks a lighter to make a flame.   
   >> Despite this, I'm sure it has its limits. I pushed it at Phil, since   
   >> he has a nose for noise, to see if this was widely useful.   
   >> One the problems is that signal conditioning has many tricks and   
   >> methods, sometimes operating simultaneously. "Lock-in" gains you say   
   >> 40 dB due to band width narrowing, and another X dB due to phase   
   >> alignment.   
   >> It's telling how Horowitz deals with this issue. He doesn't. He just   
   presents examples.   
   >> I was involved with the Astronomy Department at Harvard at one time,   
   >> but I never met Mr. Horowitz. Has anyone ever met him? Just curious.   
   >> JB   
   >   
   > I have not met either of them, but Winfield Hill used to post here all   
   > the time, a major contributor. So I *feel* as if I know him :)   
   >   
   > It was a revelation to me, my electronics bible after uni, and here on   
   > Usenet was one of the authors. And you could just ask him stuff!   
   >   
   > He seems to have vanished from here in recent years, to concentrate on   
   > the new edition hopefully...   
      
   Oops, thought I was reading sci.electronics.design, for anyone confused!   
   :)   
      
      
      
   --   
      
   John Devereux   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]


(c) 1994,  bbs@darkrealms.ca