| 摘要 |
<p>A method for identifying the state of a microphone (mic) button earphone is disclosed, on the basis of remaining the earphone structure of four-sections-plug-in, the different electric feature values are generated through changing the mic loops to make the current flow through the different loop when the earphone is in the different plug-in states, therefore, the general plug-in and mic button states of the earphone are detected according to the corresponding threshold values set for these feature values. A microphone button earphone is correspondingly disclosed, the different electric feature values are generated through changing the mic loops by the present invention to make the current flow through the different loops when the earphone is in the different states, such that the plug-in and the mic button states of the earphone are distinguished, and the cases of mute/noise/error hand-off/ error hand-up and so on, which are arose by the short circuit of the left track or the mic, are avoided.</p> |
