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Jitter measurement apparatus and its method

  • US 6,525,523 B1
  • Filed: 11/24/2000
  • Issued: 02/25/2003
  • Est. Priority Date: 11/24/2000
  • Status: Expired due to Fees
First Claim
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1. A jitter measurement apparatus comprising:

  • an analytic signal transformer for transforming a signal under measurement into a complex analytic signal;

    an instantaneous phase estimator for obtaining an instantaneous phase of the signal under measurement from the complex analytic signal transformed by said analytic signal transformer;

    a zero-crossing timing estimator for obtaining a zero-crossing timing sequence of the signal under measurement from the estimated instantaneous phase;

    a period estimator for obtaining an instantaneous period sequence of the signal under measurement from the zero-crossing timing sequence estimated by said zero-crossing timing estimator; and

    a jitter detector to which the instantaneous period sequence is supplied for obtaining a jitter of the signal under measurement.

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