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Signal loss detector for high-speed serial interface of a programmable logic device

  • US 7,996,749 B2
  • Filed: 07/03/2007
  • Issued: 08/09/2011
  • Est. Priority Date: 07/03/2007
  • Status: Active Grant
First Claim
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1. A loss-of-signal detector comprising:

  • a digital data pattern detector that compares incoming data to at least one predetermined data pattern and provides a first loss-of-signal indication based on whether said incoming data match any one of said at least one predetermined data pattern;

    an analog detector that outputs a second loss-of-signal indication based upon presence or absence of a plurality of transitions in said incoming data; and

    a decision circuit that outputs a third loss-of-signal indication based on said first and second loss-of-signal indications.

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