A High-Speed PWM-Modulated Transceiver Network for Closed-Loop Channel Topology

Kyongsu LEE
Jae-Yoon SIM

IEICE TRANSACTIONS on Electronics   Vol.E104-C    No.7    pp.350-354
Publication Date: 2021/07/01
Publicized: 2020/12/18
Online ISSN: 1745-1353
DOI: 10.1587/transele.2020CDS0001
Type of Manuscript: BRIEF PAPER
automotive communication,  pulse-width modulation,  high-speed transceiver,  interface circuits,  clock and data recovery,  

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This paper proposes a pulse-width modulated (PWM) signaling[1] to send clock and data over a pair of channels for in-vehicle network where a closed chain of point-to-point (P2P) interconnection between electronic control units (ECU) has been established. To improve detection speed and margin of proposed receiver, we also proposed a novel clock and data recovery (CDR) scheme with 0.5 unit-interval (UI) tuning range and a PWM generator utilizing 10 equally-spaced phases. The feasibility of proposed system has been proved by successfully detecting 1.25 Gb/s data delivered via 3 ECUs and inter-channels in 180 nm CMOS technology. Compared to previous study, the proposed system achieved better efficiency in terms of power, cost, and reliability.