Data transmission apparatus for high-speed transmission of digital data and method for automatic skew calibration

  • US 7,278,069 B2
  • Filed: 04/30/2003
  • Issued: 10/02/2007
  • Est. Priority Date: 10/31/2000
  • Status: Active Grant
First Claim
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1. A data transmission apparatus for high-speed transmission of digital data comprisinga communicational channel between at least one transmitter having one or more registers for transmitting a signal along the communication channel, and at least one receiver having one or more registers for receiving the signal;

  • a main clock for generating a main clock signal for said transmitter'"'"'s register(s); and

    a reference clock for generating reference signals for calibrating said receiver'"'"'s register(s);

    said reference clock being associated with said main clock;

    a means for measuring time offsets between different signals that form the communication channel, at different frequencies, and/or for different data patterns transmitted through the channel;

    a storage means for recording and storing the measured time offsets; and

    a timing correction means for applying the measured time offsets to compensate for inter-signal skew by performing relative alignment of the measured offsets to the main clock edge.

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