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Radio field intensity measurement device, and radio field intensity detector and game console using the same

  • US 8,044,813 B1
  • Filed: 11/05/2007
  • Issued: 10/25/2011
  • Est. Priority Date: 11/16/2006
  • Status: Expired due to Fees
First Claim
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1. A radio field intensity measurement device comprising:

  • an antenna configured to convert a received radiowave to an induction signal;

    a rectifier circuit configured to output a direct signal by rectifying the induction signal;

    a battery to be charged by the direct signal;

    a control circuit configured to compare a potential of the direct signal with an output potential of the battery;

    an amplifier circuit configured to amplify the direct signal; and

    a display element which is operated depending on the direct signal amplified by the amplifier circuit,wherein the control circuit is configured to charge the battery when the potential of the direct signal is higher than the output potential of the battery, and supply power of the battery to the amplifier circuit when the potential of the direct signal is lower than the output potential of the battery.

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