发明名称 |
HEADPHONE AMPLIFIER |
摘要 |
<p>Aspects of the disclosure process an amplifier circuit. The amplifier circuit includes an input stage, an intermediate stage, an output stage and a detecting and controlling circuit. The input stage is configured to receive an electrical signal for amplification. The intermediate stage is configured to amplify with an adjustable gain. The output stage is configured to drive an audio output device in response to the amplified electrical signal. The detecting and controlling circuit is configured to detect a current for driving the audio output device, and adjust the gain of the intermediate stage based on the current to compensate for a pole change of the amplifier circuit due to a change of the current.</p> |
申请公布号 |
EP2834917(A1) |
申请公布日期 |
2015.02.11 |
申请号 |
EP20130717133 |
申请日期 |
2013.04.05 |
申请人 |
MARVELL WORLD TRADE LTD. |
发明人 |
ZHOU, HAO;SHUI, TAO;SONG, YONGHUA;ZHANG, HAIQING |
分类号 |
H03F3/21;H03F1/08;H03F1/34;H03F3/45 |
主分类号 |
H03F3/21 |
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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