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Low power addressable data communication device and method

  • US 5,606,313 A
  • Filed: 11/14/1995
  • Issued: 02/25/1997
  • Est. Priority Date: 12/10/1993
  • Status: Expired due to Term
First Claim
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1. A low power, addressable data communication device comprising:

  • means for obtaining a data message having a wake-up section and a session section, said obtaining means including a receiver for continuously monitoring for said data message;

    a power manager having an input coupled to said obtaining means and having an output, said power manager for detecting a predetermined identification code from said wake-up section of said data message by continuously monitoring for said identification code and coupling said output to a battery when said predetermined identification code is detected; and

    a controller having a power input coupled to said power manager output and having a data input coupled to said obtaining means, said controller being configured to process said session section of said data message after said power manager detects said predetermined identification code, wherein said wake-up section of said data message combines wake-up data with a clock signal, and said power manager comprises;

    a decoder for separating said clock signal from said wake-up data;

    a synchronization circuit coupled to said decoder, said synchronization circuit being configured to detect a predetermined preamble code in said wake-up data; and

    an ID detection circuit coupled to said synchronization circuit, said ID detection circuit being configured to determine when a predetermined identification code follows said predetermined preamble code in said wake-up data.

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