Method for noise removal of ear phone in portable terminal and apparatus thereof

摘要

Provided is a method of removing an earphone noise of a portable terminal includes: recognizing a connection of an earphone through an interface unit; applying power to a mike bias port in case the earphone is recognized; sensing a signal which indicating a detachment of the earphone from the interface unit during applying power to the mike bias port; and discharging the power of the mike bias port when the detachment occurs.

主权项

1. A method of reducing noise of a portable terminal during a detachment of an external audio output device, the method comprising:
recognizing a connection between the external audio output device and the portable terminal by detecting contact between L terminal of the external audio output device and an interface unit of the portable terminal; applying power to a mic bias port; recognizing a detachment of the external audio output device from the portable terminal by detecting disconnection between the L terminal of the external audio device and the interface unit of the portable terminal; and in response to the detachment, grounding the mic bias port to discharge the remaining power in the mic bias port and thereby reduce noise, by a switching unit connecting a mic terminal of interface unit and an electrical ground.