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Code responsive radio receiver capable of operation with plural types of code transmitters

  • US 5,949,349 A
  • Filed: 02/19/1997
  • Issued: 09/07/1999
  • Est. Priority Date: 02/19/1997
  • Status: Expired due to Term
First Claim
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1. In an equipment actuation system, a method of responding to sequences of code digits received in a plurality of code word sequence formats including a rolling code format, each format being defined by a code word format standard, comprising the steps of:

  • receiving and detecting the digits of a transmitted code word sequence in a sequence;

    analyzing each detected digit for consistency with each of a plurality of code word format standards digit by digit as the digits are received and recovering code digits as a result of analysis;

    registering the recovered digits in a plurality of registers each associated with a different code word sequence format;

    identifying the format of the received code word sequence in response to the analyzing step; and

    storing a value in the receiver derived from a received code word sequence registered in a register associated with the identified format.

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