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Electronic watch

  • US 3,995,177 A
  • Filed: 05/09/1974
  • Issued: 11/30/1976
  • Est. Priority Date: 01/02/1973
  • Status: Expired due to Term
First Claim
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1. A regulated voltage converter for converting a relatively low voltage to a relatively high voltage comprising:

  • a voltage converter for converting said relatively low voltage to said relatively high voltage;

    a constant current source;

    reference means coupled to said constant current source and said voltage converter for providing a reference voltage related to said relatively high voltage;

    a threshold detector coupled to said reference means for generating a control signal when the output of said voltage converter drops below a predetermined threshold value;

    a sense and enable means responsive to the appearance of said control signal for enalbing said voltage converter; and

    sample means coupled to said constant current source, said threshold detector and said sense and enable means for periodically enabling the operation thereof, the duration of such enabling period being small relative to the period therebetween.

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