Pulse-Width Modulation Pre Emphasis applied in a Wireline Transmitter, achieving 33dB Loss Compensation at 5-Gb/s in 0.13-μm CMOS

J.H.R. Schrader, Eric A.M. Klumperink, J.L. Visschers, Bram Nauta

    Research output: Contribution to journalArticleAcademicpeer-review

    39 Citations (Scopus)
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    Abstract

    Abstract—A transmitter pre-emphasis technique for copper cable equalization is presented that is based on pulse-width modulation (PWM). This technique is an alternative to the usual 2-tap symbol-spaced FIR (SSF) pre-emphasis. The technique uses timing resolution instead of amplitude resolution to adjust the filter transfer function, and therefore fits well with future high-speed low-voltage CMOS processes. Spectral analysis and time domain simulations illustrate that PWM pre-emphasis offers more relative high frequency boost than 2-tap SSF. Only one coefficient needs to be set to fit the equalizer transfer function to the channel, which makes convergence of an algorithm for automatic adaptation straightforward. A proof-of-concept 0.13- m CMOS transmitter achieves in excess of 5 Gb/s (2-PAM) over 25 m of standard RG-58U low-end coaxial copper cable with 33 dB of channel loss at the Nyquist frequency (2.5 GHz). Measured BER at this speed and channel loss is 10 12.
    Original languageEnglish
    Pages (from-to)990-999
    Number of pages9
    JournalIEEE journal of solid-state circuits
    Volume41
    Issue number2/4
    DOIs
    Publication statusPublished - 1 Apr 2006

    Keywords

    • wire communication
    • EWI-3694
    • pulse-width modulation
    • transmit pre-shaping
    • transmit pre-emphasis
    • transceivers
    • equalizers
    • ICD-MULTI-CHIP X-RAY IMAGER WITH HIGH BANDWIDTH SERIAL READOUT
    • Copper
    • CMOS integrated circuits
    • IR-57308
    • METIS-238052

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