A problem with phase adder in a DDS design

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wizardyhnr

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I am just design a DDS and decides to use the pipeling adder to implement the phase adder of DDS. But the problem is that for a pipeling adder, it may take n clocks to get the adding result, while the adder in fact needs to result of the first adding clock to be ready when the second adding clock begins. So it is contraversive, I cannot solve it, would anyone who knows the answer do me a favor to let me know the solution for phase adder implemented with a pipeling adder. Thanks.
 

In such case u have to start the counter before the system starts.
 

    wizardyhnr

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I do not think that I fully understand what you proposed,will u please express the solution a little more clearly, thanks for you reply!
 

Here's a DDS paper showing a pipelined accumulator (figure 7):
**broken link removed**
 

thanks for your file!
 

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