Title :
Delta-sigma modulation in fractional-N frequency synthesis
Author :
Riley, Tom A D ; Copeland, Miles A. ; Kwasniewski, Tad A.
Author_Institution :
Dept. of Electron., Carleton Univ., Ottawa, Ont., Canada
fDate :
5/1/1993 12:00:00 AM
Abstract :
A description is given of a delta-sigma (Δ-Σ) modulation and fractional-N frequency division technique for performing indirect digital frequency synthesis using a phase-locked loop (PLL). The use of Δ-Σ 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
Keywords :
closed loop systems; delta modulation; frequency synthesizers; phase-locked loops; delta-sigma modulation; fractional-N frequency synthesis; frequency division technique; indirect digital frequency synthesis; jitter; phase noise; phase-locked loop; Bandwidth; Channel spacing; Delta-sigma modulation; Filters; Frequency conversion; Frequency synthesizers; Integrated circuit synthesis; Phase locked loops; Phase noise; Voltage-controlled oscillators;
Journal_Title :
Solid-State Circuits, IEEE Journal of
