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Power-generation detection circuit for use in an electronic device and power-generation detection method and power consumption control method for use in connection therewith

  • US 6,140,863 A
  • Filed: 06/16/1998
  • Issued: 10/31/2000
  • Est. Priority Date: 06/17/1997
  • Status: Expired due to Term
First Claim
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1. A power-generation detection circuit, for detecting the generation of AC power from an external power-generation device comprising:

  • a switching element coupled to said power-generation device and performing a switching operation in response to a cycle of said externally generated AC power;

    a capacitor element coupled to said switching element for storing charges in response to said switching operation of said switching element;

    a discharging element coupled to said capacitor element, along a discharging path of said capacitor element, and discharging the charges stored in said capacitor element; and

    a voltage detector coupled to said capacitor element and detecting whether a voltage across said capacitor element exceeds a predetermined value, and outputting a power generation detection signal for switching a circuit into a power save mode when said voltage across said capacitor does not exceed said predetermined value.

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