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Initially i am working at the matlab level .first i have inserted 9 stages of the comb filter and then upsampler of factor 8 i.e insering 7 zeros and then 9 stages of the integrator.The second integrator sum is showing the overflow problem.the input to the first integrator stage is 32 bit as obtained and the input to the second integrator is 34 bit.but the sum in the input to the input of the intgrator is overflowed.can you check the matlab code that i have sent to you and the Hogenauer's paper and compare where i am going wrong?
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I & FvM checked that already. There was typing error in your first doc which I corrected as -i+1 addition then FvM told us that Hogenauer's equation was mistyped as 2N-1 instead of 2N - i which is equivalent to what I did. Anyway I corrected te matlab code - see my last version and it does agree with your figures.
So I am more inclined to think you are doing something wrong rather than Hogenauer or Donadio or FvM are wrong. Can you post your matlab code so we get the culprit.
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