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公开(公告)号：US09986351B2
公开(公告)日：2018-05-29
申请号：US15050139
申请日：2016-02-22
Inventor： Shatam Agarwal , Anand Ilango , Alvin C. Storvik , Cory Jay Peterson , Daniel John Allen , Aniruddha Satoskar
CPC classification number: H04R29/001 , H03F3/181 , H03F2200/03 , H03F2200/222 , H03M1/46 , H03M1/66
Abstract: A portable audio device may be configured to measure load characteristics of headphones. The device may measure direct current (DC) and/or alternating current (AC) characteristics of the load. These characteristics may be measured by an audio component, such as an audio codec chip or integrated circuit (IC) controller, and reported to software or firmware executing on a processor coupled to the audio component. The software or firmware may then take action based on the measured load characteristics. For example, the load characteristics may be compared to a database of headphones and their known load characteristics to determine a particular headphone model or type of headphone attached to the audio output. The processor may then apply an appropriate equalization curve.
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公开(公告)号：US09800984B2
公开(公告)日：2017-10-24
申请号：US15099356
申请日：2016-04-14
Inventor： Shatam Agarwal , Alvin C. Storvik , Anand Ilango , Daniel John Allen
CPC classification number: H04R29/001 , H03M1/46 , H04R3/00 , H04R3/04 , H04R5/04 , H04R2420/05
Abstract: An electronic device may be configured to identify a load coupled to the device. The device may measure direct current (DC) and/or alternating current (AC) characteristics of the load to identify the load. The device may then take action based on the identification of the load. For example, a specific transducer may be identified as coupled to the electronic device and an appropriate equalization curve applied to an audio output of the device. The measurement of characteristics of the load may include controlling a reference generator according to a search algorithm, such as a step ramp or binary search, to identify the load. An analog-to-digital converter (ADC) may operate through the search algorithm to provide feedback to digital circuitry regarding how to proceed through the search algorithm to identify the load.
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公开(公告)号：US20170245071A1
公开(公告)日：2017-08-24
申请号：US15050139
申请日：2016-02-22
Inventor： Shatam Agarwal , Anand Ilango , Alvin C. Storvik , Cory Jay Peterson , Daniel John Allen , Aniruddha Satoskar
CPC classification number: H04R29/001 , H03F3/181 , H03F2200/03 , H03F2200/222 , H03M1/46 , H03M1/66
Abstract: A portable audio device may be configured to measure load characteristics of headphones. The device may measure direct current (DC) and/or alternating current (AC) characteristics of the load. These characteristics may be measured by an audio component, such as an audio codec chip or integrated circuit (IC) controller, and reported to software or firmware executing on a processor coupled to the audio component. The software or firmware may then take action based on the measured load characteristics. For example, the load characteristics may be compared to a database of headphones and their known load characteristics to determine a particular headphone model or type of headphone attached to the audio output. The processor may then apply an appropriate equalization curve.
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公开(公告)号：US20170245072A1
公开(公告)日：2017-08-24
申请号：US15099356
申请日：2016-04-14
Inventor： Shatam Agarwal , Alvin C. Storvik , Anand Ilango , Daniel John Allen
CPC classification number: H04R29/001 , H03M1/46 , H04R3/00 , H04R3/04 , H04R5/04 , H04R2420/05
Abstract: An electronic device may be configured to identify a load coupled to the device. The device may measure direct current (DC) and/or alternating current (AC) characteristics of the load to identify the load. The device may then take action based on the identification of the load. For example, a specific transducer may be identified as coupled to the electronic device and an appropriate equalization curve applied to an audio output of the device. The measurement of characteristics of the load may include controlling a reference generator according to a search algorithm, such as a step ramp or binary search, to identify the load. An analog-to-digital converter (ADC) may operate through the search algorithm to provide feedback to digital circuitry regarding how to proceed through the search algorithm to identify the load.
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