On the design of tone-free ΣΔ modulators

Lars Risbo

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    Traditional one-bit ΣΔ modulators used for A/D and D/A conversion produce very predominant tones near half the sample rate which might intermodulate in the analog converter section and cause in-band tones. This paper demonstrates how the use of chaos can substitute dither as a means for extinguishing these tones. Especially, modulator feedback filters derived from noise transfer functions having an all-pass term seem very promising
    Original languageEnglish
    JournalIEEE transactions on circuits and systems - 2, Analog and digital signal processing
    Issue number1
    Pages (from-to)52-55
    Publication statusPublished - 1995

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