Name
Abstract | ||
|---|---|---|
Digital phase-locked loops based on bang-bang phase detectors are attractive candidates for low-jitter clock-frequency multiplication. Unfortunately, the coarse quantization of phase error makes these systems prone to the generation of limit cycles appearing as unwanted spurs in the spectrum. The random noise contributed by building blocks and acting as dithering signal can eliminate those spurs. The quantitative analysis of those phenomena becomes more involved when a DCO with relaxed intrinsic resolution, such as a ΔΣ-DCO is employed, and when practical spectra of random noise sources are considered. In this work, the expression of jitter is calculated in closed-form taking into account the quantization, introduced by both phase detector and DCO, and the phase noise of DCO, with both 1/f 2 and 1/f 3 components. Combining these results, a closed-form expression of the total output jitter as a function of loop parameters and noise sources is developed which suggests a minimum-jitter design strategy. The proposed analysis and optimization are validated both numerically and experimentally on a 320-MHz digital bang-bang PLL fabricated in a 65-nm CMOS process. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/TCSI.2013.2268514 | Circuits and Systems I: Regular Papers, IEEE Transactions |
Keywords | Field | DocType |
CMOS integrated circuits,jitter,phase detectors,phase locked loops,phase noise,random noise,CMOS process,DCO,bang-bang phase detector,bang-bang phase-locked loops,coarse quantization,frequency 320 MHz,low-jitter clock-frequency multiplication,low-jitter digital phase-locked loops,minimum-jitter design,phase noise,random noise,size 65 nm,Clock generation,TDC-less,digital assistance,flicker,frequency synthesis,jitter,lead-lag control,phase noise,single-bit TDC | Phase-locked loop,Control theory,Phase noise,Electronic engineering,CMOS,Dither,Phase detector,Jitter,Quantization (signal processing),Detector,Physics | Journal |
Volume | Issue | ISSN |
61 | 1 | 1549-8328 |
Citations | PageRank | References |
16 | 0.95 | 13 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| giovanni marucci | 1 | 49 | 4.23 |
| Levantino, S. | 2 | 209 | 21.99 |
| Paolo Maffezzoni | 3 | 226 | 27.07 |
| Carlo Samori | 4 | 349 | 39.76 |