Patent ID: 7520441

Claim:
A mobile phone comprising: a chip card including: a contact bank for making contact with the mobile phone; a micro-computer; a contact interface for transmission of contact data between the contact bank and the micro-computer; a contact-less interface coupled to a contact-less terminal and for transmission of contact-less data between at least one antenna and the micro-computer; a first switch that turns on to couple a contact bias voltage from the contact interface to the micro-computer whenever the contact bias voltage is available; and a second switch that turns on to couple a contact-less bias voltage from the contact-less interface to the micro-computer when the contact-less bias voltage is available and when the contact bias voltage is not available, wherein the first switch is configured to be turned on for coupling the available contact bias voltage to the micro-computer and wherein the second switch is configured to be turned off, even while the micro-computer receives and processes the contact-less data from the contact-less interface.