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    IMPEDANCE TRACKING FOR CONNECTOR BETWEEN SOURCE AND LOAD
    3.
    发明申请
    IMPEDANCE TRACKING FOR CONNECTOR BETWEEN SOURCE AND LOAD 有权

    公开(公告)号：US20250024197A1

    公开(公告)日：2025-01-16

    申请号：US18353092

    申请日：2023-07-16

    Applicant: Cirrus Logic International Semiconductor Ltd.

    Inventor： Emmanuel A. Marchais ,  Ziyan Zou ,  Chin Huang Yong

    IPC: H04R3/00 ,  H04R29/00

    Abstract: The impedance of a connector, such as a flex cable, between a source and load affects the temperature and power consumption within an electronic system, such as a mobile device. According to embodiments described in this disclosure, the impedance of the flex cable may be separately tracked from the impedance of the source, which provides for improved power management within the electronic system. The impedance of the flex cable may be factored into determining a maximum available power to the load. The impedance of the flex cable may also be mapped to a temperature and used to manage power to maintain operation within temperature limits. Additional aspects of power management and impedance tracking for a connector are described herein.

    FREQUENCY DOMAIN ADAPTATION WITH DYNAMIC STEP SIZE ADJUSTMENT BASED ON ANALYSIS OF STATISTIC OF ADAPTIVE FILTER COEFFICIENT MOVEMENT
    4.
    发明申请
    FREQUENCY DOMAIN ADAPTATION WITH DYNAMIC STEP SIZE ADJUSTMENT BASED ON ANALYSIS OF STATISTIC OF ADAPTIVE FILTER COEFFICIENT MOVEMENT 有权

    公开(公告)号：US20210020157A1

    公开(公告)日：2021-01-21

    申请号：US16516644

    申请日：2019-07-19

    Applicant: Cirrus Logic International Semiconductor Ltd.

    Inventor： Dayong Zhou ,  Chin Huang Yong

    IPC: G10K11/178

    Abstract: An adaptive filter includes a frequency domain adaptation block that analyzes a statistic of coefficient movement in the frequency domain. The adaption block adjusts, in the frequency domain, a parameter (step size or leakage factor) that affects speed of convergence of the adaptive filter based on the analyzed statistic of filter coefficient movement. The filter includes an associated coefficient, statistic of coefficient movement, and parameter for each frequency bin. The coefficients may be complex numbers, and separate real and imaginary statistics and parameters are maintained. The statistic may be direction counts of the filter coefficient movement. The step size may be adjusted to a predetermined minimum value when the current direction of movement of the filter coefficient is different than the predominant direction and otherwise the step size is adjusted approximately proportionally to an amount of predominance by a value based on a direction count of the filter coefficient movement.

    Frequency domain adaptation with dynamic step size adjustment based on analysis of statistic of adaptive filter coefficient movement
    6.
    发明授权
    Frequency domain adaptation with dynamic step size adjustment based on analysis of statistic of adaptive filter coefficient movement 有权

    公开(公告)号：US10984778B2

    公开(公告)日：2021-04-20

    申请号：US16516644

    申请日：2019-07-19

    Applicant: Cirrus Logic International Semiconductor Ltd.

    Inventor： Dayong Zhou ,  Chin Huang Yong

    IPC: G10K11/178

    Abstract: An adaptive filter includes a frequency domain adaptation block that analyzes a statistic of coefficient movement in the frequency domain. The adaption block adjusts, in the frequency domain, a parameter (step size or leakage factor) that affects speed of convergence of the adaptive filter based on the analyzed statistic of filter coefficient movement. The filter includes an associated coefficient, statistic of coefficient movement, and parameter for each frequency bin. The coefficients may be complex numbers, and separate real and imaginary statistics and parameters are maintained. The statistic may be direction counts of the filter coefficient movement. The step size may be adjusted to a predetermined minimum value when the current direction of movement of the filter coefficient is different than the predominant direction and otherwise the step size is adjusted approximately proportionally to an amount of predominance by a value based on a direction count of the filter coefficient movement.

    Feedback howl management in adaptive noise cancellation system
    7.
    发明授权
    Feedback howl management in adaptive noise cancellation system 有权

    公开(公告)号：US10290296B2

    公开(公告)日：2019-05-14

    申请号：US15337223

    申请日：2016-10-28

    Applicant: Cirrus Logic International Semiconductor Ltd.

    Inventor： Jon D. Hendrix ,  Jeffrey D. Alderson ,  Chin Huang Yong ,  Ryan A. Hellman

    IPC: H04R1/10 ,  G10K11/178 ,  H04R3/00

    Abstract: An integrated circuit may include an output for providing an output signal to a transducer including both a source audio signal for playback to a listener and an anti-noise signal for countering the effect of ambient audio sounds in an acoustic output of the transducer, an ambient microphone input for receiving an ambient microphone signal indicative of the ambient audio sounds; an error microphone input for receiving an error microphone signal indicative of the output of the transducer and the ambient audio sounds at the transducer; and a processing circuit that implements a feedback path having a feedback response that generates a feedback anti-noise signal from the error microphone signal, wherein a signal gain of the feedback path is a function of the ambient microphone signal, and wherein the anti-noise signal comprises at least the feedback anti-noise signal.

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