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1.发明授权Systems and methods for detection of load impedance of a transducer device coupled to an audio device 有权用于检测耦合到音频装置的换能器装置的负载阻抗的系统和方法公开(公告)号：US09479868B2
公开(公告)日：2016-10-25
申请号：US14036136
申请日：2013-09-25
Applicant: Cirrus Logic, Inc.
Inventor： Anand Ilango , Daniel John Allen , Aniruddha Satoskar
IPC: H04R3/00 , H04R29/00 , G10K11/178 , H03F1/02 , H03F3/181 , H03F3/52 , H03F3/185 , H03F1/52 , H03F3/183 , H04R5/04
CPC classification number: H04R3/007 , G10K11/17854 , G10K11/17881 , G10K11/17885 , G10K2210/1081 , G10K2210/30232 , G10K2210/3045 , G10K2210/3049 , H03F1/0211 , H03F1/0227 , H03F1/52 , H03F3/181 , H03F3/183 , H03F3/185 , H03F3/52 , H03F2200/03 , H03F2200/462 , H03F2200/471 , H04R5/04 , H04R29/001 , H04R2420/05
Abstract: In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal.
Abstract translation: 根据本公开的系统和方法，音频设备可以包括电端子，音频电路和换能器负载检测电路。 电气终端可将传感器装置耦合到音频装置。 音频电路可以产生模拟音频信号，其中模拟音频信号耦合到电气端子。当换能器装置从音频装置耦合到音频装置时，传感器负载检测电路可以检测换能器装置的负载阻抗， 电气终端。
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公开(公告)号：US09287839B1
公开(公告)日：2016-03-15
申请号：US14056108
申请日：2013-10-17
Applicant: Cirrus Logic, Inc.
Inventor： Christophe Jean-Francois Amadi , Jason Lee Wardlaw , Emmanuel A. Marchais , Dylan Alexander Hester , Daniel John Allen , John Christopher Tucker
CPC classification number: H03F3/45659 , H03F1/02 , H03F1/26 , H03F1/34 , H03F3/187 , H03F3/45475 , H03F3/45753 , H03F2200/03 , H03F2203/45138 , H03F2203/45212 , H03F2203/45526 , H03F2203/45586 , H03G3/32
Abstract: A DC servo loop may track DC offset changes of an input signal and apply feedback to amplifiers to adjust a DC offset of the input signal. The DC servo loop may include digital loop tracking and analog loop tracking components. The digital loop tracking components may track small changes in the DC offset. When the DC offset exceeds a certain threshold, analog loop tracking may be activated to apply feedback to the amplifiers to adjust the DC offset. The adjustments to the DC offset may be delayed until an amplitude of the input signal exceeds a threshold to reduce contribution to noise in the input signal.
Abstract translation: DC伺服环路可以跟踪输入信号的DC偏移变化，并将反馈应用于放大器以调整输入信号的直流偏移。 DC伺服环路可以包括数字环路跟踪和模拟环路跟踪组件。 数字环路跟踪组件可以跟踪DC偏移的小变化。 当DC偏移超过某个阈值时，可以激活模拟环路跟踪以将反馈应用于放大器以调整DC偏移。 DC偏移的调整可能被延迟，直到输入信号的幅度超过阈值以减小输入信号中对噪声的贡献。
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公开(公告)号：US09705458B1
公开(公告)日：2017-07-11
申请号：US14812405
申请日：2015-07-29
Applicant: Cirrus Logic, Inc.
Inventor： John Christopher Tucker , Daniel John Allen , John L. Melanson , Ammisetti Prasad
CPC classification number: H03G3/004 , H02M3/07 , H03F1/0227 , H03F1/025 , H03F3/183 , H03F2200/03 , H03F2200/211 , H03F2200/507 , H03G3/20 , H03G3/3031
Abstract: An energy-efficient consumer device audio power output stage with gain control provides improved battery life and reduced power dissipation without clipping the audio output signal. A control circuit controls a power supply that supplies the power supply rails to the power amplified output stage. The voltage of the power supply rails is controlled in conformity with an input audio signal level, which may be determined from a volume control setting of the device and/or from a signal level detector that determines the amplitude of the signal being amplified. The gain applied to the audio input signal is reduced for a predetermined time period when a higher output voltage of the power supply is selected, to avoid clipping the audio output signal.
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公开(公告)号：US09634621B1
公开(公告)日：2017-04-25
申请号：US14035654
申请日：2013-09-24
Applicant: Cirrus Logic, Inc.
Inventor： Anand Ilango , Aniruddha Satoskar , Daniel John Allen , Bharath Kumar Thandri
IPC: H03F3/20
CPC classification number: H03F1/0227 , H02M3/07 , H02M2001/0032 , H03F1/025 , H03F3/3022 , H03F3/505 , H03F2200/03 , H03F2200/211 , H03F2200/507 , Y02B70/16
Abstract: A method may include providing a power supply voltage to a power supply input of a power amplifier by a charge pump power supply having a select input for selecting an operating mode of the charge pump power supply, such that in a first operating mode, the power supply voltage is equal to a first voltage, and such that in a second operating mode the power supply voltage is equal to a fraction of the first voltage; wherein the power amplifier has an audio input for receiving an audio input signal, and an audio output for providing the output signal, and generates the output signal based on the audio input signal. The method may also include selecting an operating mode of the charge pump power supply based on a magnitude of the power supply voltage and a magnitude of the output signal, such that the charge pump power supply operated in the operating mode having the lowest power supply voltage in which a difference between a magnitude of the power supply voltage and a magnitude of the output signal is more than the predetermined threshold voltage.
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公开(公告)号：US09391576B1
公开(公告)日：2016-07-12
申请号：US14083972
申请日：2013-11-19
Applicant: Cirrus Logic, Inc.
Inventor： Aniruddha Satoskar , Daniel John Allen , Tejasvi Das
CPC classification number: H03G3/3026 , H03G3/001 , H03G3/002 , H03G3/3005 , H03M1/186 , H03M1/66 , H03M1/70
Abstract: In accordance with embodiments of the present disclosure, an apparatus for providing an output signal to an audio transducer may include an analog signal path portion, a digital-to-analog converter (DAC), and a control circuit. The analog signal path portion may have an audio input for receiving an analog input signal, an audio output for providing the output signal, and a selectable analog attenuation, and may be configured to generate the output signal based on the analog input signal and in conformity with the selectable analog attenuation. The DAC may have a selectable digital gain and may be configured to convert a digital audio input signal into the analog input signal in conformity with the selectable digital gain. The control circuit may be configured to select the selectable analog attenuation and select the selectable digital gain based on a magnitude of a signal indicative of the output signal.
Abstract translation: 根据本公开的实施例，用于向音频换能器提供输出信号的装置可以包括模拟信号路径部分，数模转换器（DAC）和控制电路。 模拟信号路径部分可以具有用于接收模拟输入信号的音频输入，用于提供输出信号的音频输出和可选择的模拟衰减，并且可以被配置为基于模拟输入信号生成输出信号 具有可选择的模拟衰减。 DAC可以具有可选择的数字增益，并且可以被配置为根据可选择的数字增益将数字音频输入信号转换成模拟输入信号。 控制电路可以被配置为基于指示输出信号的信号的大小来选择可选择的模拟衰减并选择可选数字增益。
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Patent Agency Ranking
6.发明授权Systems and methods for detection of load impedance of a transducer device coupled to an audio device 有权用于检测耦合到音频装置的换能器装置的负载阻抗的系统和方法公开(公告)号：US09578417B2
公开(公告)日：2017-02-21
申请号：US14036682
申请日：2013-09-25
Applicant: Cirrus Logic, Inc.
Inventor： Anand Ilango , Daniel John Allen , Aniruddha Satoskar
IPC: H04R3/00 , H04R5/04 , H03F1/02 , H03F1/52 , H03F3/183 , H03F3/185 , G10K11/178 , H03F3/52 , H04R29/00 , H03F3/181
CPC classification number: H04R3/007 , G10K11/17854 , G10K11/17881 , G10K11/17885 , G10K2210/1081 , G10K2210/30232 , G10K2210/3045 , G10K2210/3049 , H03F1/0211 , H03F1/0227 , H03F1/52 , H03F3/181 , H03F3/183 , H03F3/185 , H03F3/52 , H03F2200/03 , H03F2200/462 , H03F2200/471 , H04R5/04 , H04R29/001 , H04R2420/05
Abstract: In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal. The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal.
Abstract translation: 根据本公开的系统和方法，音频设备可以包括电气终端，音频电路和换能器负载检测电路。 电气终端可将传感器装置耦合到音频装置。 音频电路可以产生模拟音频信号，其中模拟音频信号耦合到电气终端。 换能器负载检测电路可以根据在电气端子处测量的特性将传感器装置耦合到音频装置时，检测换能器装置的负载阻抗。
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7.发明授权Systems and methods for detection of load impedance of a transducer device coupled to an audio device 有权用于检测耦合到音频装置的换能器装置的负载阻抗的系统和方法公开(公告)号：US09479869B2
公开(公告)日：2016-10-25
申请号：US15042757
申请日：2016-02-12
Applicant: Cirrus Logic, Inc.
Inventor： Anand Ilango , Daniel John Allen , Aniruddha Satoskar
IPC: H04R3/00 , H04R29/00 , G10K11/178 , H03F1/02 , H03F3/181 , H03F3/52 , H03F3/185 , H03F1/52 , H03F3/183 , H04R5/04
CPC classification number: H04R3/007 , G10K11/17854 , G10K11/17881 , G10K11/17885 , G10K2210/1081 , G10K2210/30232 , G10K2210/3045 , G10K2210/3049 , H03F1/0211 , H03F1/0227 , H03F1/52 , H03F3/181 , H03F3/183 , H03F3/185 , H03F3/52 , H03F2200/03 , H03F2200/462 , H03F2200/471 , H04R5/04 , H04R29/001 , H04R2420/05
Abstract: In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal. The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal.
Abstract translation: 根据本公开的系统和方法，音频设备可以包括电气终端，音频电路和换能器负载检测电路。 电气终端可将传感器装置耦合到音频装置。 音频电路可以产生模拟音频信号，其中模拟音频信号耦合到电气终端。 换能器负载检测电路可以根据在电气端子处测量的特性将传感器装置耦合到音频装置时，检测换能器装置的负载阻抗。
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8.发明申请SYSTEMS AND METHODS FOR DETECTION OF LOAD IMPEDANCE OF A TRANSDUCER DEVICE COUPLED TO AN AUDIO DEVICE 有权用于检测耦合到音频设备的传感器装置的负载阻抗的系统和方法公开(公告)号：US20150078560A1
公开(公告)日：2015-03-19
申请号：US14036682
申请日：2013-09-25
Applicant: Cirrus Logic, Inc.
Inventor： Anand Ilango , Daniel John Allen , Aniruddha Satoskar
IPC: H04R29/00
CPC classification number: H04R3/007 , G10K11/17854 , G10K11/17881 , G10K11/17885 , G10K2210/1081 , G10K2210/30232 , G10K2210/3045 , G10K2210/3049 , H03F1/0211 , H03F1/0227 , H03F1/52 , H03F3/181 , H03F3/183 , H03F3/185 , H03F3/52 , H03F2200/03 , H03F2200/462 , H03F2200/471 , H04R5/04 , H04R29/001 , H04R2420/05
Abstract: In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal.
Abstract translation: 根据本公开的系统和方法，音频设备可以包括电气终端，音频电路和换能器负载检测电路。 电气终端可将传感器装置耦合到音频装置。 音频电路可以产生模拟音频信号，其中模拟音频信号耦合到电气端子。当换能器装置从音频装置耦合到音频装置时，传感器负载检测电路可以检测换能器装置的负载阻抗， 电气终端。
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9.发明授权公开(公告)号：US09648414B1
公开(公告)日：2017-05-09
申请号：US14169946
申请日：2014-01-31
Applicant: Cirrus Logic, Inc.
Inventor： Tejasvi Das , Daniel John Allen
IPC: H04R3/00 , H03G3/00 , G06F1/00 , H04M3/00 , H04R1/40 , H03K3/00 , G11B20/14 , G06F13/42 , G11B20/10
CPC classification number: H04R3/00 , G06F1/00 , G06F13/42 , G11B20/10527 , G11B20/1403 , H03G3/00 , H03G3/348 , H03K3/00 , H04M3/002 , H04R1/403 , H04R1/406 , Y02D10/14 , Y02D10/151
Abstract: Responsive to the absence of a reference clock input signal to a clock conditioning circuit for generating a desired clock signal for synchronizing components of an audio signal path, a controller may cause the signal path to receive at the clock input a substitute clock signal in the absence of the reference clock input signal and may modify one or more parameters of the signal path in order to perform one or more of the following: (i) reduce the presence of audio artifacts in the output signal caused by the absence of the reference clock input signal; (ii) power down at least one component of the signal path to reduce power consumed by the signal path; (iii) continue to operate the signal path with the substitute clock signal; and (iv) transition the signal path to a mute condition or a zero volume condition.
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10.发明申请公开(公告)号：US20160165348A1
公开(公告)日：2016-06-09
申请号：US15042757
申请日：2016-02-12
Applicant: Cirrus Logic, Inc.
Inventor： Anand Ilango , Daniel John Allen , Aniruddha Satoskar
CPC classification number: H04R3/007 , G10K11/17854 , G10K11/17881 , G10K11/17885 , G10K2210/1081 , G10K2210/30232 , G10K2210/3045 , G10K2210/3049 , H03F1/0211 , H03F1/0227 , H03F1/52 , H03F3/181 , H03F3/183 , H03F3/185 , H03F3/52 , H03F2200/03 , H03F2200/462 , H03F2200/471 , H04R5/04 , H04R29/001 , H04R2420/05
Abstract: In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal. The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal.
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