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Network device with embedded timing synchronization

  • US 6,868,092 B1
  • Filed: 07/11/2000
  • Issued: 03/15/2005
  • Est. Priority Date: 05/20/2000
  • Status: Expired due to Term
First Claim
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1. A network device, comprising:

  • a central timing subsystem providing a timing reference signal comprising a main timing signal and an embedded timing signal comprises;

    an embeddor circuit for distorting the duty cycle of the main timing signal to encode the embedded timing signal within the main timing signal to provide the timing reference signal, wherein the embeddor circuit comprises;

    a plurality of cascaded registers for providing the timing reference signal;

    a rollover counter for counting to a predetermined number corresponding to a clock period of the embedded timing signal; and

    a load circuit for loading a predetermined value into the plurality of cascaded registers when the rollover counter rolls over to distort the duty cycle of the main timing reference signal.

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