Patent ID: 9158360
Filing Date: 2015-10-13
Classification: G06F,Y02D

Abstract:
1. An electronic apparatus on which a card is mounted, the card including first and second devices which are drivable with different driving voltages, the electronic apparatus comprising: an electronic circuit configured to perform radio communication with an external device via an antenna and to wirelessly receive electric power from the external device; a battery; a first voltage regulator configured to generate a first driving voltage for driving the first device of the card unit and a second driving voltage for driving the second device of the card unit using electric power from the battery; a second voltage regulator configured to generate the first driving voltage and the second driving voltage using electric power received wirelessly from the external device by the electronic circuit; a first switch configured to select any one of the first driving voltage generated by the first voltage regulator and the first driving voltage generated by the second voltage regulator; a second switch configured to select any one of the second driving voltage generated by the first voltage regulator and the second driving voltage generated by the second voltage regulator; a first controller configured to control the first switch (i) such that the first driving voltage generated by the first voltage regulator is selected when an electric power supply capability of the battery exceeds a first threshold, and (ii) such that the first driving voltage generated by the second voltage regulator is selected when the electric power supply capability of the battery is equal to or lower than the first threshold; and a second controller configured to control the second switch (i) such that the second driving voltage generated by the first voltage regulator is selected when the electric power supply capability of the battery exceeds a second threshold which is different from the first threshold, and (ii) such that the second driving voltage generated by the second voltage regulator is selected when the electric power supply capability of the battery is equal to or lower than the second threshold.