Name
Title | ||
|---|---|---|
6.6 A 22.5-to-32Gb/s 3.2pJ/b referenceless baud-rate digital CDR with DFE and CTLE in 28nm CMOS |
Abstract | ||
|---|---|---|
Baud-rate clock and data recovery circuits (CDRs) are becoming more prevalent in high-speed receiver designs as they offer lower power consumption by sampling the received data only once per UI [1,2]. This reduces the number of front-end comparators and clock distribution networks [1]. However, current baud-rate CDRs require an external reference clock [1,2], adding to the system complexity in pin count and clock generation. While frequency detectors (FDs) allow CDR designs to operate without a reference clock and across a wide capture range [3-5], current FDs are not designed for baud-rate CDRs. As well, current FDs rely on sharp data edges and are not designed for significant ISI caused by channel loss at high data rates [3-5]. This work presents a reference-less baud-rate CDR that operates from 22.5Gb/s to 32Gb/s with channel loss up to -14.8dB at Nyquist. An FD scheme is proposed that automatically controls an adjustable PD to correct any frequency error. This eliminates the need for a separate frequency acquisition loop in the CDR. The CDR, with a CTLE and a 1-tap DFE, is fabricated in 28nm CMOS. The entire receiver consumes 3.2pJ/b at 32Gb/s PRBS-31. |
Year | DOI | Venue |
|---|---|---|
2017 | 10.1109/ISSCC.2017.7870290 | 2017 IEEE International Solid-State Circuits Conference (ISSCC) |
Keywords | Field | DocType |
baud-rate clock and data recovery circuits,high-speed receiver designs,front-end comparators,external reference clock,frequency detectors,sharp data edges,channel loss,reference-less baud-rate CDR,FD scheme,adjustable PD,frequency error,CTLE,1-tap DFE,CMOS,bit rate 22.5 Gbit/s to 32 Gbit/s,loss -14.8 dB | Comparator,Computer science,Communication channel,Electronic engineering,CMOS,Data recovery,Nyquist–Shannon sampling theorem,Electronic circuit,Baud,Detector | Conference |
ISBN | Citations | PageRank |
978-1-5090-3759-9 | 3 | 0.49 |
References | Authors | |
6 | 7 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Wahid Rahman | 1 | 6 | 1.61 |
| Danny Yoo | 2 | 62 | 7.08 |
| Joshua Liang | 3 | 14 | 2.65 |
| Ali Sheikholeslami | 4 | 416 | 54.27 |
| Hirotaka Tamura | 5 | 204 | 32.19 |
| Takayuki Shibasaki | 6 | 66 | 12.00 |
| Hisakatsu Yamaguchi | 7 | 64 | 10.20 |