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Design >> Analog Design >> cascaded(1-1-1) modulator
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Message started by GaAs on Mar 7^th, 2005, 1:13am

Title: cascaded(1-1-1) modulator
Post by GaAs on Mar 7^th, 2005, 1:13am

Hi All,

In p202 of "Delta-Sigma Data Converter: Theory, Design and simulation" by Norsworthy, Figure6.6 show a cascaded (1-1-1) modulator. But deriving the formula, it seem that it can not canceled the quantization errors in the first and second stages. If we remove the unit delay between stages, it will be O.K.

I also found the reference paper(ref[6]) of this chapter, it doesn't have such delay units.

Is it the error of the book?

Thanks
GaAs