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Identification level control method and optical receiver

  • US 7,382,987 B2
  • Filed: 04/12/2004
  • Issued: 06/03/2008
  • Est. Priority Date: 10/09/2003
  • Status: Expired due to Fees
First Claim
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1. A method of controlling an identification level for an optical receiver wherein the optical receiver converts an optical signal from an optical fiber into an electric signal, uses a limiter amplifier to amplify the electric signal, and reproduces data, the method comprising:

  • changing an identification level supplied to the limiter amplifier between a lower bound and an upper bound thereof and storing a respective average of an output of the limiter amplifier corresponding to each identification level together with the identification level;

    setting a first average between a minimal value of the respective averages and a predefined value and a second average between a maximal value of the respective averages and the predefined value, said predefined value being between the minimal value and the maximal value, and obtaining a first identification level corresponding to the first average and a second identification level corresponding to the second average; and

    computing an optimal identification level based on the first identification level and the second identification level and supplying the optimal identification level to the limiter amplifier.

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