Patent ID: 9407233
Filing Date: 2016-08-02
CPC Classification: H03H,H04B,H04W

Claim Text:
1. An electronic system comprising: an antenna having first and second terminals; a first irremovable component coupled to the antenna and configured to communicate via the antenna according to a first contactless-type communication protocol using a carrier frequency; a second removable component configured to couple to the antenna and communicate according to a second contactless-type communication protocol using the carrier frequency; an impedance matching circuit comprising a first capacitor coupled in parallel to the antenna, the first capacitor having a first electrode coupled to the first terminal of the antenna and a second electrode coupled to the second terminal of the antenna, a second capacitor having a first electrode coupled to the first electrode of the first capacitor and a second electrode, and a third capacitor having a first electrode coupled to the second electrode of the first capacitor and a second electrode; a controllable activation component coupled in series between the second electrode of the second capacitor and the second electrode of the third capacitor and configured to define a first configuration state of the impedance matching circuit formed by the first, second and third capacitors when the second removable component is not coupled to the antenna, and a second configuration state of the impedance matching circuit when the second removable component is coupled to the antenna and the second and third capacitors are disabled from the impedance matching circuit; an interface coupled to the antenna and configured to couple to the second removable component; and a controller configured to set the first configuration state when the second removable component is not coupled to the interface, and to set the second configuration state when the second removable component is coupled to the interface.