发明名称 |
Earphone power amplifier, working method, and mobile terminal equipment |
摘要 |
The present invention provides an earphone power amplifier, including a ground contact connected to a ground wire of an earphone, a left sound channel power amplifying circuit connected to a left sound channel of the earphone, and a right sound channel power amplifying circuit connected to a right sound channel of the earphone. The left sound channel power amplifying circuit includes a first operational amplifier and a first positive feedback exported from an input end of the first ferrite bead to an in-phase input end of the first operational amplifier, the right sound channel power amplifying circuit includes a second operational amplifier and a second positive feedback exported from the input end of the first ferrite bead to an in-phase input end of the second operational amplifier. |
申请公布号 |
EP2632175(A1) |
申请公布日期 |
2013.08.28 |
申请号 |
EP20120186830 |
申请日期 |
2012.10.01 |
申请人 |
HUAWEI DEVICE CO., LTD. |
发明人 |
ZHEN, HAITAO;YANG, YONGXIANG;YAN, XUXING;YANG, WENTAO |
分类号 |
H04R3/00;H01Q1/44;H03F3/68;H04B1/18;H04R5/033;H04W4/00 |
主分类号 |
H04R3/00 |
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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