Oversampled Edge Equalization

NEC, Santa Clara, CAIn recent chip-to-chip and backplane data transfers on printedcircuit boards, data-rates are limited not by the operating speedsof the circuits in the transceiver LSIs, but by the bandwidth ofthe transmission media. Duobinary [1] is a type of partialresponse signaling that can be helpful in reducing the requiredbandwidth, because it allows for a controlled amount of ISI to beremoved afterward. Figure 3.6.1 shows the transfer function forduobinary signaling, as well as channel loss and the frequencyresponse of the combined channel and transmitter/receiver equal-izers. In duobinary signaling, the resulting ISI may be expressedin the z-domain as 1+z

[1]  Vladimir Stojanovic,et al.  Equalization and clock recovery for a 2.5-10-Gb/s 2-PAM/4-PAM backplane transceiver cell , 2003 .

[2]  Adam Lender,et al.  The duobinary technique for high-speed data transmission , 1963, Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics.