Patent ID: 8670801

Claim:
An electronic entity adapted for a mobile terminal, said mobile terminal being able to comprise a subscriber identity card and able to provide a first electrical power supply suitable for operation of the subscriber identity card, said electronic entity comprising: a near-field communication device with which is associated a threshold operating value of the device; an antenna for the near-field communication device; and a wire-based interface intended to link the near-field communication device to the mobile terminal, said wire-based interface carrying the first electrical power supply from the mobile terminal to the near-field communication device, wherein a voltage converter receives the first electrical power supply from the terminal via the wire-based interface, and provides the near-field communication device with a second electrical power supply suitably adapted according to said threshold operating value of the device; and wherein the near-field communication device, on the basis of the second electrical power supply, provides a third electrical power supply to the subscriber identity card, said third electrical power supply having a value substantially equal to the first electrical power supply.