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Signal processing circuit outputting a signal representing the number of times an input signal rises in a predetermined period as a signal corresponding to a quality of the input signal

  • US 6,954,709 B2
  • Filed: 08/23/2002
  • Issued: 10/11/2005
  • Est. Priority Date: 09/06/2001
  • Status: Expired due to Fees
First Claim
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1. A signal processing circuit outputting a signal corresponding to a quality of a digitized input signal, the circuit comprising:

  • a noise-removed signal generation unit generating a noise-removed signal from said input signal, the noise-removed signal excluding a noise component, an edge counter counting a number of times said input signal rises and/or falls in a predetermined period that is defined by increments of one clock cycle of said noise-removed signal with reference to points in time at which a polarity of said noise-removed signal is inverted;

    an output unit outputting a signal corresponding to said number of times as the signal corresponding to the quality of said input signal; and

    a quality judgment unit judging the quality of said input signal according to the signal output from said output unit.

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