Patent ID: 11916616
Assignee: NXP B.V.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method of operating a near field communication, NFC, device, the NFC device comprising an NFC unit, a detection unit and a processing unit, the method comprising:
charging, by the NFC unit, an external device under charge by transferring power to said device under charge through an NFC channel;
detecting, by the detection unit, predefined events occurring on the NFC channel when said power is being transferred to the device under charge; and
controlling, by the processing unit, the transferring of power to the device under charge in dependence on the events detected by the detection unit wherein the processing unit disables, at least in part, a receiver comprised in the NFC unit when said power is being transferred to the device under charge;
wherein the detection unit includes a receiver signal monitor, wherein said receiver signal monitor monitors signal changes in a receiver path of the NFC unit,
wherein said signal changes in the receiver path are indicative of one or more of the predefined events;
wherein the detection unit includes a transmitter current monitor, wherein said transmitter current monitor monitors signal changes in a supply current path to a transmitter of the NFC unit, wherein said signal changes in the supply current path are indicative of one or more of the predefined events; and
wherein the detection unit further includes a decoder configured to decode digital inputs received via the receiver signal monitor and the transmitter current monitor into detected events, and to notify the processing unit of said detected events.