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Method of recovering and decoding of Manchester coded data

  • US 6,963,295 B1
  • Filed: 07/02/2004
  • Issued: 11/08/2005
  • Est. Priority Date: 07/02/2004
  • Status: Active Grant
First Claim
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1. A method of receiving and decoding transmitted Manchester-coded data signals comprising the steps of:

  • receiving a series of Manchester-coded bits at an interrogation unit;

    determining a start point and an end point of each of said Manchester-coded data bits;

    measuring a first time period between said start point and a selected first one of a negative and positive voltage transition that occurs during one of said Manchester-coded data bits after said start point;

    measuring a second time period between the end point and the last of the other one of a negative and positive transition;

    comparing said first time period and said second time period;

    determining that said Manchester-coded data bit is representative of one of a “

    0”

    bit and a “

    1”

    bit if said first time period is less than said second time period; and

    determining that said Manchester-coded data bit is representative of the other one of a “

    0”

    bit and a “

    1”

    bit if said first time period is greater than said second time period.

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