Earphone jack for eliminating power noise in mobile communication terminal, and operating method thereof
First Claim
1. An earphone jack provided in a mobile communication terminal, the earphone jack comprising:
- 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 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.
1 Assignment
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Accused Products
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.
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Citations
12 Claims
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1. An earphone jack provided in a mobile communication terminal, the earphone jack comprising:
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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 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for driving an earphone jack in a mobile communication terminal, the method comprising the steps of:
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determining whether an audio signal to be output is a media sound source signal comprising a sound source media data signal, or a call voice signal comprising a wireless call voice signal;
maintaining a ground on state and outputting the media sound source signal in stereo when it is determined that the media sound source signal is output; and
maintaining a ground off state and outputting a differential signal when it is determined that the call voice signal is output. - View Dependent Claims (11, 12)
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Specification