Delta-sigma modulation in fractional-N frequency synthesis

Delta-sigma modulation in fractional-N frequency synthesis

A description is given of a delta-sigma ( Delta - Sigma ) modulation and fractional-N frequency division technique for performing indirect digital frequency synthesis using a phase-locked loop (PLL). The use of Delta - Sigma modulation concepts results in beneficial shaping of the phase noise (jitte...

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Veröffentlicht in:IEEE journal of solid-state circuits 1993-05, Vol.28 (5), p.553-559
Hauptverfasser: Riley, T.A.D., Copeland, M.A., Kwasniewski, T.A.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Bandwidth
Channel spacing
Circuit properties
Delta-sigma modulation
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Filters
Frequency conversion
Frequency synthesizers
Integrated circuit synthesis
Oscillators, resonators, synthetizers
Phase locked loops
Phase noise
Voltage-controlled oscillators
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Beschreibung
Zusammenfassung:A description is given of a delta-sigma ( Delta - Sigma ) modulation and fractional-N frequency division technique for performing indirect digital frequency synthesis using a phase-locked loop (PLL). The use of Delta - Sigma modulation concepts results in beneficial shaping of the phase noise (jitter) introduced by fractional-N division. The technique has the potential to provide low phase noise, fast settling time, and reduced impact of spurious frequencies when compared with existing fractional-N PLL techniques.< >
ISSN:0018-9200
1558-173X
DOI:10.1109/4.229400