发明名称 |
Method and circuitry for identifying type of plug connected to a dual-use jack |
摘要 |
This method is applied to a dual-use jack of an electronic device. Either a headphone plug or a line output plug is inserted into the dual-use jack. The method determines the type of a plug connected to the dual-use jack when the plug is inserted into the dual-use jack. The determination is made based on a load resistance of the plug connected to the jack. The method includes feeding an electric current through the load resistance in a first direction. The method compares a voltage across the load resistance to a reference voltage and determines the type of the plug in use. The method also includes feeding an electric current through the load resistance in a second direction. This electric current can reduce or eliminate a pop-noise when the plug type is determined. The second direction is different from the first direction. |
申请公布号 |
US8558562(B2) |
申请公布日期 |
2013.10.15 |
申请号 |
US20100926275 |
申请日期 |
2010.11.05 |
申请人 |
SAITO NAOTAKA;OKI SEMICONDUCTOR CO., LTD. |
发明人 |
SAITO NAOTAKA |
分类号 |
G01R27/08;H04R1/10 |
主分类号 |
G01R27/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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