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Method for clock and data recovery

  • US 8,180,007 B2
  • Filed: 01/14/2010
  • Issued: 05/15/2012
  • Est. Priority Date: 01/14/2010
  • Status: Expired due to Fees
First Claim
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1. A method for recovering clock and data from an input bit stream, comprising:

  • receiving the input bit stream;

    oversampling the received input bit stream using a plurality of phases of a reference clock signal to obtain one or more sets of data samples;

    identifying one or more sets of non-transitioning phases of the one or more sets of data samples;

    identifying one or more center phases corresponding to the one or more sets of non-transitioning phases, wherein a center phase corresponds to a set of non-transitioning phases;

    calculating one or more bit-wise transition vectors corresponding to the identified one or more center phases;

    comparing the one or more bit-wise transition vectors with one or more predefined bitmasks;

    selecting a first final center phase from the identified one or more center phases based on the comparison of the bit-wise transition vectors with the one or more predefined bitmasks; and

    recovering data by extracting data samples from the input bit stream corresponding to the selected first final center phase.

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