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https://designers-guide.org/forum/YaBB.pl Design >> RF Design >> A basic question on sigma-delta modulator https://designers-guide.org/forum/YaBB.pl?num=1141276544 Message started by steven on Mar 1st, 2006, 9:15pm |
Title: A basic question on sigma-delta modulator Post by steven on Mar 1st, 2006, 9:15pm Hi, I think this question is very basic but I am new to this field. The question is about digital sigma-delta modulator (SDM) in fractional-N synthesizer. The SDM takes K-bits input and output N-bit to the divider (K>=N). What is the contribution of the N-bit SDM output? I mean, since K>N, then the divider could simply use the K-bit. This digital-in-digital-out setup confuses me. Thanks. |
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