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???
06/16/09 07:26
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#166114 - this depends on your definition of logic
Responding to: ???'s previous message
We have discussed this in our local HW mailing list through the night.

This is certainly the case of FPGAs and similar "sea of gates"-type of logic, with small-number-of-input gates.

However, if you have a wide input AND available (such as in the (C)PLD's AND/OR matrix, and of course in full-custom logic), this is quite straightforwardly implemented as N invertors and N N-bit ANDs, all ORed together.

However, the winner solution was to use 3 opamps (and a handful of resistors): one as a summing amplifier, and two as a window comparator... :-)

JW


List of 14 messages in thread
TopicAuthorDate
an algorithmic puzzle            01/01/70 00:00      
   For example            01/01/70 00:00      
      that fast?            01/01/70 00:00      
         Other interesting tricks in base-2:            01/01/70 00:00      
   yuk            01/01/70 00:00      
      this depends on your definition of logic            01/01/70 00:00      
         Its a good solution            01/01/70 00:00      
            Why huge?            01/01/70 00:00      
               Infinite?            01/01/70 00:00      
                  Yes            01/01/70 00:00      
                     Offset            01/01/70 00:00      
                  this was supposed to be fun, Kai            01/01/70 00:00      
                     I always take you seriously...            01/01/70 00:00      
                        pure software            01/01/70 00:00      

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