×

Adaptation of an antenna circuit for a near-field communication terminal

  • US 10,249,946 B2
  • Filed: 06/10/2013
  • Issued: 04/02/2019
  • Est. Priority Date: 06/11/2012
  • Status: Active Grant
First Claim
Patent Images

1. A method for adapting an antenna circuit that includes a first capacitive element and an inductive element electrically coupled to each other by a first node, and a second capacitive element having a first electrode electrically coupled to the first capacitive element and the inductive element by the first node, the antenna circuit being tuned for near field communications, the method comprising:

  • detecting a voltage at the first node by a first input terminal of a follower-assembled differential amplifier, the amplifier having a second input terminal, and an output terminal connected to the second input terminal; and

    applying a first signal, representative of the voltage at the first node directly to a second electrode of said second capacitive element by the output terminal of the amplifier.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×