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Rolling code security system

  • US 20020034303A1
  • Filed: 10/17/2001
  • Published: 03/21/2002
  • Est. Priority Date: 01/21/2000
  • Status: Active Grant
First Claim
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1. A transmitter for sending an encrypted signal to control an device, comprising:

  • means for generating a radio frequency oscillatory signal;

    means for generating a variable binary code;

    means for generating a three-valued or trinary code responsive to the binary variable code; and

    means for modulating the radio frequency oscillatory signal with the trinary code to produce a modulated trinary coded variable radio frequency signal for operation or control of a secure actuator.

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