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???
05/31/06 21:02
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 		 #117437 - code
Responding to: ???'s previous message
you'll find the code at
http://www.8052.com/users/jezwoldspage/nco.zip
however it doesnt have any interface to the nco top level so youll need to I presume bolt on an 8052 interface.the rom.vhd file contains the waveform, all the code is very straight forward and basically acts in the same was as an analogue vco, you might need to check out vco design theory.
the frequency range available depends on the size of the adder which is 18 bits in this case, but obviously be changed if needed


List of 41 messages in thread
TopicAuthorDate
Sine Wave to pulse Converter            01/01/70 00:00      
   a very much simpler idea            01/01/70 00:00      
   In fact            01/01/70 00:00      
      Accuracy            01/01/70 00:00      
         the accuracy            01/01/70 00:00      
            Sinusoidal NCO            01/01/70 00:00      
               the original            01/01/70 00:00      
   if you can live with the delay, then            01/01/70 00:00      
      If all else fails            01/01/70 00:00      
   What about a fast comparator?            01/01/70 00:00      
      Great            01/01/70 00:00      
   Another Idea            01/01/70 00:00      
   It's doable, but why this way?            01/01/70 00:00      
   Zero-crossing detector            01/01/70 00:00      
   one thing nobody's mentioned ...            01/01/70 00:00      
      oh yeah            01/01/70 00:00      
      nco simulation            01/01/70 00:00      
         code            01/01/70 00:00      
      Don't like it            01/01/70 00:00      
         not an OP-Amp ..            01/01/70 00:00      
            What I had in mind            01/01/70 00:00      
               a) and b)            01/01/70 00:00      
               You can...            01/01/70 00:00      
            code            01/01/70 00:00      
               Thanks            01/01/70 00:00      
                  depends on what make of device they are            01/01/70 00:00      
                     GAL16V8            01/01/70 00:00      
                        WinCupl            01/01/70 00:00      
                        GAL16V8 is a bit small            01/01/70 00:00      
                           ispLEVER            01/01/70 00:00      
                              look around for PALASM            01/01/70 00:00      
                                 Mr.Boole invented it when silicon was a            01/01/70 00:00      
                                    it is a teeny bit ancient            01/01/70 00:00      
                                       Yes, it's ancient ... but so am I ...            01/01/70 00:00      
                                          VHDL is waning            01/01/70 00:00      
                                             Fewer vhdl users means.....            01/01/70 00:00      
                                             look at who pays for the articles            01/01/70 00:00      
                                             VHDL vs Verilog            01/01/70 00:00      
                              ispGAL            01/01/70 00:00      
   SGN output            01/01/70 00:00      
      Nope            01/01/70 00:00      

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