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公开(公告)号：EP4441576A1
公开(公告)日：2024-10-09
申请号：EP22843962.6
申请日：2022-11-30
发明人： KESKIN, Mustafa , MIAO, Guoqing , WADHWA, Sameer
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公开(公告)号：EP2936838B1
公开(公告)日：2017-03-08
申请号：EP13821579.3
申请日：2013-12-19
CPC分类号： H04R3/007 , H04R29/001
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公开(公告)号：EP2269301A2
公开(公告)日：2011-01-05
申请号：EP09716435.4
申请日：2009-03-03
发明人： BAZARJANI, Seyfollah , MIAO, Guoqing , FITZGERALD, Joseph, R. , KULKARNI, Prajakt, V. , GAGNE, Justin, Joseph Rosen , MCALLISTER, Gene, H. , HINRICHS, Jeffrey , VAN DER WAGT, Jan, Paul
摘要： A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.
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公开(公告)号：EP4133487A1
公开(公告)日：2023-02-15
申请号：EP21743336.6
申请日：2021-06-22
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公开(公告)号：EP2269301B1
公开(公告)日：2020-04-15
申请号：EP09716435.4
申请日：2009-03-03
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公开(公告)号：EP2936838A1
公开(公告)日：2015-10-28
申请号：EP13821579.3
申请日：2013-12-19
IPC分类号： H04R29/00
CPC分类号： H04R3/007 , H04R29/001
摘要： Techniques for sensing the resistance of a load. In an aspect, a sense resistor is provided in series with the load. Each terminal of the sense resistor is alternately coupled via switches to a sense amplifier. A second input of the sense resistor is coupled to a terminal of the load. The voltage drop across the load and the voltage drop across the load plus sense resistor are alternatively measured. These voltage drops may be digitized and used to compute a resistance of the load using, e.g., a digital processor.
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7.发明授权
公开(公告)号：EP2409401B1
公开(公告)日：2015-05-27
申请号：EP10716923.7
申请日：2010-03-18
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公开(公告)号：EP2193605B1
公开(公告)日：2012-07-25
申请号：EP08835931.0
申请日：2008-09-26
发明人： CHILAKAPATI, Uma , BAZARJANI, Seyfollah , FITZGERALD, Joseph , MIAO, Guoqing , NELSON, Hui-Ya , SIDIQI, Khalid J. , HINRICHS, Jeffrey
CPC分类号： H03M3/384 , H03M1/1019 , H03M1/66 , H03M3/50
摘要： A digital offset is combined with an audio signal in the digital domain to cancel an output offset caused by one or more analog components processing the same audio signal. In this manner, the offset at the output of the audio signal path (e.g., at a power amplifier output) is reduced or eliminated. Consequently, audible artifacts, such as click-and-pop artifacts, can be reduced or eliminated. In audio devices operating in ground-referenced capless mode, power consumption is reduced because of reduced or eliminated direct current (DC) leakage current through speakers or headsets of such audio devices. In some circumstances, the digital offset in the digital domain may be applied at substantially all times of operation of the audio signal path.
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公开(公告)号：EP2834993A1
公开(公告)日：2015-02-11
申请号：EP13716936.3
申请日：2013-04-05
发明人： MIAO, Guoqing , SHAH, Peter J.
CPC分类号： H04R1/1041 , H04R5/04 , H04R2420/05 , H04R2420/09
摘要： Techniques for utilizing a plurality of switches to reduce crosstalk in a headset jack for accommodating both European and North American type headset plugs. In an aspect, a six-switch solution is provided to selectively couple first and second terminals of the jack to a ground and a microphone terminal, and further to selectively couple a ground sensing input to the first or second terminal of the jack. The ground sensing input is provided to left and right audio channel amplifiers for driving the corresponding left and right terminals of the headset, to provide a common-mode reference level to the left and right audio channel amplifiers. In another aspect, at least four physical pins are provided to couple the switches to the ground and microphone terminals of the jack, and the connections between the ground sensing inputs and the jack may be provided adjacent to the jack for better isolation.
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10.发明授权
公开(公告)号：EP2245735B1
公开(公告)日：2012-09-19
申请号：EP09709121.9
申请日：2009-01-29
发明人： MIAO, Guoqing
CPC分类号： H03F1/305 , H03F3/187 , H03F3/45475 , H03F2200/03 , H03F2203/45136
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