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Electronic device for detecting proximity of user and operation method thereof

  • US 10,649,599 B2
  • Filed: 06/28/2018
  • Issued: 05/12/2020
  • Est. Priority Date: 06/30/2017
  • Status: Active Grant
First Claim
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1. An electronic device for detecting proximity of a user comprising:

  • an antenna configured to be at least a part of an exterior of the electronic device, wherein a voltage of the antenna is a voltage of a reference capacitor serving as an equivalent circuit for the antenna, the reference capacitor having a capacitance corresponding to at least one capacitor connected to the antenna;

    a variable element configured to have a capacitance in a designated range, wherein an upper limit of the designated range is smaller than the capacitance of the reference capacitor; and

    an amplifier connected to the variable element and configured to amplify a voltage of the variable element to a voltage of the reference capacitor and output the amplified voltage,wherein the capacitance of the reference capacitor corresponds to a first change rate of the voltage of the reference capacitor during a designated time interval.

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