Samsung Electronics Co., Ltd.

In-Ki Kim

Sang-Il Choi

Min-Woong Ha

A battery charging device using an ear-microphone jack of a mobile apparatus. The battery charging device comprises a battery; an ear-microphone socket having a microphone contact, an earphone contact, and a common ground contact; a modem chip having a microphone input port connected to the microphone contact or an internal microphone and an earphone output port connected to the earphone contact or an internal speaker; and a cutting-off element connected between a power supply contact and the battery, for providing a charging voltage provided via the power supply contact to the battery and preventing a current from flowing backward from the battery to the modem chip. A power supply device comprises a plug having terminals connectable to contacts of the ear-microphone socket; and a power source connector for connecting a power supply source to the plug.

Battery charging device for a mobile apparatus using an ear-microphone jack

An apparatus controls battery power in a mobile terminal supporting digital multimedia broadcasting (DMB) service. In the apparatus, first and second radio frequency (RF) signal processors respectively process DMB signals and call signals received through associated antennas. A DMB modem demodulates DMB signals output from the first RF signal processor. A voltage detector detects a voltage of the mobile terminal and disables the DMB modem if the detected voltage is less than or equal to a threshold.

Growing community of inventors

Suwon-si, South Korea

In-Ki Kim