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Offset control circuit, optical receiver using the same and optical communication system

  • US 6,819,722 B2
  • Filed: 12/08/2000
  • Issued: 11/16/2004
  • Est. Priority Date: 12/15/1999
  • Status: Expired due to Fees
First Claim
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1. An offset control circuit comprising offset canceling means for canceling an offset component included in a pair of positive-phase and negative-phase signals and varying transitionally according to elapse of time by using a peak value of at least one of said positive-phase and negative-phase signals and a bottom value of at least one of said positive-phase and negative-phase signals and an adder circuit adding one of said positive-phase and negative-phase signals, to the peak value, and the bottom value of said positive-phase or negative phase signals at substantially the same ratio.

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