Synchronous read channel integrated circuit employing a channel quality circuit for calibration

  • US 5,978,162 A
  • Filed: 03/19/1997
  • Issued: 11/02/1999
  • Est. Priority Date: 02/01/1993
  • Status: Expired due to Term
First Claim
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1. A synchronous read channel for reading data recorded on a magnetic disk storage medium by detecting binary data from a sequence of discrete time sample values generated by sampling pulses in an analog read signal from a magnetic read head positioned over the magnetic disk storage medium, comprising:

  • (a) a sampling device, responsive to a sampling clock, for sampling the analog read signal to generate the discrete time sample values;

    (b) a timing recovery circuit, responsive to the discrete time sample values, for extracting timing information;

    (c) a discrete time sequence detector, responsive to the discrete time sample values, for detecting the binary data; and

    (d) a channel quality circuit, responsive to the discrete time sample values, for calibrating the synchronous read channel.

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