Name
Abstract | ||
|---|---|---|
A hybrid analog-digital quarter-rate clock and data recovery circuit (CDR) that achieves a wide-tracking range and excellent frequency and phase tracking resolution is presented in this paper. A split-tuned analog phase-locked loop (PLL) provides eight equally spaced phases needed for quarter-rate data recovery and the digital CDR loop adjusts the phase of the PLL output clocks in a precise manner to facilitate plesiochronous clocking. The CDR employs a second-order digital loop filter and combines delta-sigma modulation with the analog PLL to achieve sub-picosecond phase resolution and better than 2 ppm frequency resolution. A test chip fabricated in a 0.18 mum CMOS process achieves BER <10-12 and consumes 14 mW power while operating at 2 Gb/s. The tracking range is greater than plusmn5000 ppm and plusmn2500 ppm at 10 kHz and 20 kHz modulation frequencies, respectively, making this CDR suitable for systems employing spread-spectrum clocking. |
Year | DOI | Venue |
|---|---|---|
2008 | 10.1109/JSSC.2007.914290 | Solid-State Circuits, IEEE Journal of |
Keywords | Field | DocType |
CMOS integrated circuits,clocks,delta-sigma modulation,digital filters,phase locked loops,synchronisation,CMOS process,PLL,bit rate 2 Gbit/s,delta-sigma modulation,digital loop filter,frequency tracking resolution,hybrid analog-digital quarter-rate clock and data recovery circuit,phase tracking resolution,plesiochronous clocking,power 14 mW,size 0.18 mum,split-tuned analog phase-locked loop,spread-spectrum clocking,wide-tracking range clock data recovery circuit,Clock and data recovery,delta-sigma,digital phase interpolation,phase-locked loop (PLL),spread-spectrum clocking | Phase-locked loop,Plesiochronous system,Digital filter,Clock recovery,Control theory,Computer science,Delta-sigma modulation,CMOS,Modulation,Electronic engineering,Chip | Journal |
Volume | Issue | ISSN |
43 | 2 | 0018-9200 |
Citations | PageRank | References |
39 | 3.15 | 10 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Pavan Kumar Hanumolu | 1 | 240 | 27.03 |
| Gu-Yeon Wei | 2 | 1927 | 214.15 |
| Un-Ku Moon | 3 | 836 | 140.98 |