Spurious -Tone Suppression Techniques Applied to a Wide-Bandwidth 2.4GHz Fractional-N PLL

Spurious -Tone Suppression Techniques Applied to a Wide-Bandwidth 2.4GHz Fractional-N PLL

This paper describes a fractional-N PLL IC based on a new digital quantizer that replaces the DeltaSigma modulator (DeltaSigmaM) used in conventional designs. In combination with a charge pump offset technique and a sampled loop filter the new quantizer enables state-of-the-art fractional spur perfo...

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Bibliographische Detailangaben
Hauptverfasser: Wang, Kevin J., Swaminathan, Ashok, Galton, Ian
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Coupling circuits
Filters
Frequency synthesizers
Phase frequency detector
Phase locked loops
Phase noise
Pulse generation
Solid state circuits
Switches
Voltage-controlled oscillators
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Beschreibung
Zusammenfassung:This paper describes a fractional-N PLL IC based on a new digital quantizer that replaces the DeltaSigma modulator (DeltaSigmaM) used in conventional designs. In combination with a charge pump offset technique and a sampled loop filter the new quantizer enables state-of-the-art fractional spur performance without sacrificing BW.
ISSN:0193-6530
2376-8606
DOI:10.1109/ISSCC.2008.4523197