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Serial line synchronization method and apparatus

  • US 6,269,127 B1
  • Filed: 03/19/1997
  • Issued: 07/31/2001
  • Est. Priority Date: 09/24/1992
  • Status: Expired due to Term
First Claim
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1. An apparatus for decoding a serial transmission having a data signal, a clock signal and a frame synchronization signal encoded as a biphase mark signal being defined by a modulation protocol and having a protocol violation representing said frame synchronization signal, comprsing:

  • means for detecting transitions in said bi-phase mark signal;

    means for deriving a toggle clock signal from said bi-phase mark signal;

    means for generating, in response to the detected transitions and said toggle clock signal, a bit clock signal;

    means for recovering, in response to the detected transitions and said bit clock signal, said data signal; and

    means for recovering, in response to the detected transitions and said bit clock signal, said frame synchronization signal.

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