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01/07/06 16:30
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#106786 - Differenece between...
Responding to: ???'s previous message
Mahmood Elnasser said:
Steve M. Taylor said:
There is no such thing as zero hertz is there - you have to switch it on or off sometime don't you !
Steve

Of course there is. Don't be a wally!
My mom taught me that DC has 0 Hz frequency!
Mahmood


Ah but, if you switch it on one week and off the next,then on, then off, its really a 0.8 microhertz square wave isn't it ? My telescope drives can see errors in the low microhertz.

;-)

Charles posted a little logic circuit which is a pretty damned good way of doing a quartz reference clock generator

Steve




List of 28 messages in thread
TopicAuthorDate
frequency generation            01/01/70 00:00      
   Use an NCO            01/01/70 00:00      
      Microcontroller emulates NCOs            01/01/70 00:00      
         Nice but...            01/01/70 00:00      
            we can think of something            01/01/70 00:00      
         nothing special            01/01/70 00:00      
   how about a PLL (Phase Locked Loop)            01/01/70 00:00      
      PLL            01/01/70 00:00      
         0 ?            01/01/70 00:00      
            Part no?            01/01/70 00:00      
               Clock speed            01/01/70 00:00      
            0 Hz Frequency            01/01/70 00:00      
               Differenece between...            01/01/70 00:00      
   If Max is 1 kHz, ...            01/01/70 00:00      
      more details            01/01/70 00:00      
         Difficult !            01/01/70 00:00      
   8253?            01/01/70 00:00      
      Mode 3            01/01/70 00:00      
         mode 3 again            01/01/70 00:00      
      Example            01/01/70 00:00      
         1MHz / 1001            01/01/70 00:00      
            Concretely...            01/01/70 00:00      
      Overview of functions            01/01/70 00:00      
      What do you think?            01/01/70 00:00      
         why not '52?            01/01/70 00:00      
            is it possible?            01/01/70 00:00      
         its an option            01/01/70 00:00      
   please i need to square wave osscillator            01/01/70 00:00      

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