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105 records (took 0.017 seconds)

    On-chip resistor divider compensation with a 2VRMS input
    31.
    发明授权
    On-chip resistor divider compensation with a 2VRMS input 有权

    公开(公告)号：US10135406B2

    公开(公告)日：2018-11-20

    申请号：US15385717

    申请日：2016-12-20

    Applicant: Avnera Corporation

    Inventor： Ali Hadiashar ,  Wai Laing Lee

    IPC: H03G3/20 ,  H03F3/183 ,  H03F3/45

    Abstract: A new compensation system for an audio input reduces noise by matching feedback ratios in the positive and negative paths. A variable resistance network allows for fine control of resistance trimming in one of the signal paths, which allows for compensation between tolerance of resistors that are external to an integrated circuit and those that are internal to the integrated circuit.

    Active noise cancelation with controllable levels
    32.
    发明授权
    Active noise cancelation with controllable levels 有权

    公开(公告)号：US10049653B2

    公开(公告)日：2018-08-14

    申请号：US15570273

    申请日：2016-10-14

    Applicant: Avnera Corporation

    Inventor： Amit Kumar ,  Eric Sorensen

    IPC: G10K11/178

    Abstract: A system including an automatic noise canceling (ANC) headphone and a processor. The ANC headphone has a microphone configured to generate a microphone signal and at least two non-zero ANC gain levels. The processor is configured to receive the microphone signal, determine a characteristic of the microphone signal, identify a revised ANC level from the ANC gain levels based on a comparison of the characteristic to at least one threshold, and output a signal corresponding to the revised ANC level. Methods are also disclosed.

    Method and apparatus for dynamically allocating memory address space between physical memories
    35.
    发明授权
    Method and apparatus for dynamically allocating memory address space between physical memories 有权
    在物理存储器之间动态分配存储器地址空间的方法和装置

    公开(公告)号：US09298600B2

    公开(公告)日：2016-03-29

    申请号：US13738709

    申请日：2013-01-10

    Applicant: Avnera Corporation

    Inventor： Ole Bentz ,  Robert Mays ,  Bruce Nepple ,  James Anderson

    IPC: G06F12/00 ,  G06F12/02 ,  G06F12/06

    CPC classification number: G06F12/0223 ,  G06F12/0638 ,  G06F2212/1012 ,  G06F2212/205

    Abstract: A memory address space for each of a plurality of physical memories in a microprocessor-based system is allocated prior to knowing the desired logical size of at least one of the physical memories. At least two of the allocated memory address spaces overlap at least a portion of each other. After the system is fabricated, a pointer value set that corresponds to an address boundary between at least two physical memories of the fabricated system is set during boot time and/or during run time when the size of the physical memories are known. The technique provides a faster time-to-market for microprocessor-based systems by allowing, for example, Application Specific Integrated Circuits (ASICs) comprising microprocessor systems on-chip be manufactured prior to the final firmware and software being fully developed. Additionally, the subject matter disclosed herein permits changes in memory-space allocation for finalized ASIC designs.

    Abstract translation: 在知道至少一个物理存储器的期望的逻辑大小之前，分配用于基于微处理器的系统中的多个物理存储器中的每一个的存储器地址空间。 所分配的存储器地址空间中的至少两个与彼此的至少一部分重叠。 在制造系统之后，在引导时间和/或在运行时间期间设置物理存储器的大小已知时，设置对应于所制造的系统的至少两个物理存储器之间的地址边界的指针值集合。 该技术通过允许例如在最终固件和软件完全开发之前制造包括芯片上的微处理器系统的专用集成电路（ASIC）来为基于微处理器的系统提供更快的上市时间。 此外，本文公开的主题允许最终ASIC设计的存储空间分配的改变。

    Calibrated feedback
    37.
    发明授权
    Calibrated feedback 有权
    校准反馈

    公开(公告)号：US08207788B2

    公开(公告)日：2012-06-26

    申请号：US12082081

    申请日：2008-04-07

    Applicant: Wai L. Lee ,  Patrick A. Quinn ,  Garry N. Link ,  Adam C. Broun ,  Eric T. King

    Inventor： Wai L. Lee ,  Patrick A. Quinn ,  Garry N. Link ,  Adam C. Broun ,  Eric T. King

    IPC: H03F3/217

    CPC classification number: H03F1/301 ,  H03F1/342 ,  H03F3/2173

    Abstract: A differential feedback amplifier is provided with a feedback network wherein that feedback network is adjustable so as to improve the PSRR of the amplifier. In another aspect of the present invention, a differential feedback amplifier is provided with a feedback network wherein that feedback network is adjustable so as to improve the CMRR of the amplifier. In a further aspect of the present invention, a Class D amplifier is provided with a passive differential feedback, summing with an input current at a differential virtual ground produced by an amplifier which is a sub-section of the Class D amplifier.

    Abstract translation: 差分反馈放大器设置有反馈网络，其中反馈网络是可调节的，以便改善放大器的PSRR。 在本发明的另一方面，差分反馈放大器设置有反馈网络，其中反馈网络是可调节的，以便改善放大器的CMRR。 在本发明的另一方面，D类放大器被提供有无源差分反馈，与由作为D类放大器的子部分的放大器产生的差分虚拟接地处的输入电流相加。

    User voice activity detection
    38.
    发明授权
    User voice activity detection 有权

    公开(公告)号：US11614916B2

    公开(公告)日：2023-03-28

    申请号：US16730134

    申请日：2019-12-30

    Applicant: AVNERA CORPORATION

    Inventor： Jiajin An ,  Michael Jon Wurtz ,  David Wurtz ,  Manpreet Khaira ,  Amit Kumar ,  Shawn O'Connor ,  Shankar Rathoud ,  James Scanlan ,  Eric Sorensen

    IPC: G10L25/00 ,  G06F3/16 ,  G10L25/84 ,  H04R1/10 ,  H04R3/00 ,  G10L15/08 ,  G10L15/22 ,  H04R1/40 ,  G10K11/178 ,  H04R5/033 ,  G06F1/3206 ,  G06F1/3287

    Abstract: Many headsets include automatic noise cancellation (ANC) which dramatically reduces perceived background noise and improves user listening experience. Unfortunately, the voice microphones in these devices often capture ambient noise that the headsets output during phone calls or other communication sessions to other users. In response, many headsets and communication devices provide manual muting circuitry, but users frequently forget to turn the muting on and/or off creating further problems as they communicate. To address this, the present inventors devised, among other things, an exemplary headset that detects the absence or presence of user speech, automatically muting and unmuting the voice microphone without user intervention. Some embodiments leverage relationships between feedback and feedforward signals in ANC circuitry to detect user speech, avoiding the addition of extra hardware to the headset. Other embodiments also leverage the speech detection function to activate and deactivate keyword detectors, and/or sidetone circuits, thus extending battery.

    EARBUD OPERATION DURING EARBUD INSERTION DETECTION
    39.
    发明申请
    EARBUD OPERATION DURING EARBUD INSERTION DETECTION 有权

    公开(公告)号：US20220312104A1

    公开(公告)日：2022-09-29

    申请号：US17806295

    申请日：2022-06-10

    Applicant: AVNERA CORPORATION

    Inventor： Michael Jon Wurtz ,  Amit Kumar ,  Jiajin An

    IPC: H04R1/10 ,  H04R29/00 ,  H04R3/04 ,  G10K11/178 ,  H03F13/00 ,  H03G7/00 ,  H04R1/08

    Abstract: A method of operating a headphone configured to be removed from and placed in close proximity to a user's ear can include generating an input signal by an input signal generating device. The method can also include determining whether an insertion event has occurred based on the generated input signal and causing the headphone to operate in 5 a low power mode responsive to an absence of an insertion event determination after a first period of time. The method can also include causing the headphone to operate in an ultra-low power mode responsive to the absence of an insertion event determination after a second period of time that occurs after the first period of time, the ultra-low power mode having a lower power consumption than the low power mode.

    Headphone off-ear detection
    40.
    发明授权
    Headphone off-ear detection 有权

    公开(公告)号：US11006201B2

    公开(公告)日：2021-05-11

    申请号：US16588108

    申请日：2019-09-30

    Applicant: Avnera Corporation

    Inventor： Amit Kumar ,  Shankar Rathoud ,  Michael Jon Wurtz ,  Eric Etheridge ,  Eric Sorensen

    IPC: H04R1/10 ,  H04R29/00 ,  G10K11/178 ,  H04R3/00

    Abstract: Disclosed is a signal processor for headphone off-ear detection. The signal processor includes an audio output to transmit an audio signal toward a headphone speaker in a headphone cup. The signal processor also includes a feedback (FB) microphone input to receive a FB signal from a FB microphone in the headphone cup. The signal processor also includes an off-ear detection (OED) signal processor to determine an audio frequency response of the FB signal over an OED frame as a received frequency response. The OED processor also determines an audio frequency response of the audio signal times an off-ear transfer function between the headphone speaker and the FB microphone as an ideal off-ear response. A difference metric si generated comparing the received frequency response to the ideal off-ear frequency response. The difference metric is employed to detect when the headphone cup is disengaged from an ear.

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