Earphone jack for eliminating power noise in mobile communication terminal, and operating method thereof

Abstract

An earphone jack for a mobile communication terminal and a driving method thereof, wherein the earphone jack includes a first speaker terminal for providing a positive (+) differential call voice signal when a call voice signal is output, a second speaker terminal for providing a negative (−) differential call voice signal when the call voice signal is output, and a switchable ground terminal for maintaining a ground on state when a media sound source is output, and becoming a ground off state when the call voice signal is output. The method includes the steps of determining whether an audio signal to be currently output is a media sound source signal (that is, a sound source media data signal), or a call voice signal (that is, a wireless call voice signal), and when the media sound source signal is output, maintaining a ground on state and outputting the media sound source signal in stereo, and when the call voice signal is output, maintaining a ground off state and outputting a differential signal.

Dependencies are inferred from the claim text.