Patent ID: 8536828
Filing Date: 2013-09-17
Classification: H02J

Abstract:
1. An electronic device comprising: an antenna element; a contactless integrated circuit (IC) card function unit configured to be connected to the antenna element and process a signal received at the antenna; a clamp circuit included in the contactless IC card function unit, the clamp circuit configured to suppress excessive voltage of the signal received at the antenna; a contactless charging function unit including a battery and configured to be connected to the antenna, and charge the battery by receiving an electromotive force induced at the antenna; a switching module configured to eliminate or reduce the function of the clamp circuit; and a control unit connected to the switching module and configured to determine whether the contactless IC card function unit is in use or the contactless charging function unit is in use and control the switching module based on the determination, wherein the switching module is a switch included in the clamp circuit configured to switch the clamp circuit between at least a first threshold voltage level and a second threshold voltage level, wherein the first threshold voltage level is lower than the second threshold voltage level.