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Digital low-power programmable alarm clock for use with reflectance photometer instruments and the like

  • US 5,107,469 A
  • Filed: 07/31/1990
  • Issued: 04/21/1992
  • Est. Priority Date: 07/31/1990
  • Status: Expired due to Term
First Claim
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1. An alarm clock system for generating an alarm control signal at a predefined time TA comprising:

  • means for calculating a count value corresponding to the number Tp of predefined time periods existing between a given instantaneous time and the predefined time TA ;

    means for generating a reference signal corresponding to the passage of each of said predefined time periods;

    storage means for being loaded with and for storing said count value and incrementing said stored count value each time said predefined time period has elapsed; and

    means for generating the alarm control signal when said stored count value has been incremented to a predefined maximum value.

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