A pattern-dependent injection-locked CDR for clock-embedded signaling. (February 2020)

• Record Type: Journal Article
• Authors: Hong, Jaehyeong; Baek, Dong Hoon; Son, Hyunwoo; Ahn, Cheolmin; Kim, Byungsub; Park, Hong-June; Sim, Jae-Yoon
• Is Part Of: Microelectronics journal. Volume 96(2020)
• Publication Date: 2020-02
• Subjects: Clock-embedded signaling -- Clock and data recovery -- Pattern dependent -- Clock injection -- Data-dependent jitter; Microelectronics -- Periodicals; Microélectronique -- Périodiques; Microelectronics; Electronic journals; Journals - contents and abstracts; Periodicals; 621.3805
• DOI: 10.1016/j.mejo.2020.104708
• Languages: English
• ISSNs: 0959-8324

Abstract

Abstract: This paper presents a CDR architecture for clock-embedded signaling. To suppress the effect of data-dependent jitter of the conventional DLL-based approach, we propose a pattern-dependent injection-locking scheme in a PLL-based clock recovery circuit. It achieves both benefits of PLL and DLL, the input jitter filtering and the clearance of accumulated VCO jitter, respectively. A jitter analysis is also presented to develop a design strategy for the optimal extraction of injection timing from random data stream. The CDR, implemented in a 28 ​nm CMOS, achieves a data rate of 12.5 ​Gb/s with a 13.7 ​dB-loss channel and verifies the validity of the analysis.