Patent ID: 8971804
Filing Date: 2015-03-03
Classification: G06K,G11C,H04B

Abstract:
1. A communication device, comprising: a first power supply unit configured to derive a first power supply from a magnetic field, the first power supply unit comprising: a second switch configured to couple or to decouple a second power supply to the NFC functionality; and a controller configured to cause the first switch to couple the first power supply to the NFC functionality and to cause the second switch to decouple the second power supply from the NFC functionality when the second power supply is insufficient to power the NFC functionality and when an intensity of the magnetic field is high enough for the first power supply to generate sufficient power for the NFC functionality, wherein the first switch and the second switch are further configured to operate in a complementary manner such that the first switch and the second switch are not configured to couple the first power supply and the second power supply, respectively, to the NFC functionality at the same time.