Innovative 28 Gb/s quarter rate receiver with data-rate-tolerant adaptive continuous-time linear equalizer. (February 2021)

• Record Type: Journal Article
• Authors: Han, Weijia; Wang, Yongsheng; Wang, Jinxiang
• Is Part Of: Microelectronics journal. Volume 108(2021)
• Publication Date: 2021-02
• Subjects: Adaption equalizer -- Data-rate-tolerant -- Spectrum balancing method -- Data sampler -- Quarter rate; Microelectronics -- Periodicals; Microélectronique -- Périodiques; Microelectronics; Electronic journals; Journals - contents and abstracts; Periodicals; 621.3805
• DOI: 10.1016/j.mejo.2020.104946
• Languages: English
• ISSNs: 0959-8324

Abstract

Abstract: This paper presents a 28 Gb/s receiver with a data-rate-tolerant adaptive continuous-time linear equalizer (CTLE). The adaptive CTLE works based on the spectrum balancing method. An equalizer boost control loop is used to adjust the equalizer boost while a corner frequency control loop guarantees data-rate adaption. The speed of similar devices is limited by the necessary slicer. In this study, rather than the output signal of a slicer, the recovered data is used as the input for the corner frequency control loop. A data sampler may have oversize bandwidth during the sample period and a high gain during the regeneration period, thus the proposed structure can secure a clean waveform at high speeds. The quarter rate structure further relaxes the slicer-related speed limit. The receiver consumes 232.2 mW with a 1.2 V supply when realized in 55-nm CMOS technology while the equalizer consumes 70 mW.