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公开(公告)号：US11972105B2
公开(公告)日：2024-04-30
申请号：US17962086
申请日：2022-10-07
发明人： Hamid Sepehr , Pablo Peso Parada , Willem Zwart , Tom Birchall , Michael Allen Kost , Tejasvi Das , Siddharth Maru , Matthew Beardsworth , Bruce E. Duewer
CPC分类号： G06F3/0488 , G06F3/0412 , G06F3/0414 , G01L5/162 , G01L5/164 , G01L5/165 , G01L5/167 , G06F2203/04105 , H04M2250/22
摘要： A force sensing system for determining if a user input has occurred, the system comprising: an input channel, to receive an input from at least one force sensor; an activity detection stage, to monitor an activity level of the input from the at least one force sensor and, responsive to an activity level which may be indicative of a user input being reached, to generate an indication that an activity has occurred at the force sensor; and an event detection stage to receive said indication, and to determine if a user input has occurred based on the received input from the at least one force sensor.
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公开(公告)号：US10809758B2
公开(公告)日：2020-10-20
申请号：US15926598
申请日：2018-03-20
发明人： Bruce E. Duewer , Brad Allan Lambert , Michael A. Kost , Marc J. Kobayashi , David Hisky , Vitaliy Kulikov
IPC分类号： G06F1/24 , G06F1/10 , G06F13/38 , G06F1/3215 , G06F1/12 , G06F13/42 , G06F1/3234 , G06F1/08
摘要： A device may include an input for receiving information communicated from a host to the device and a controller configured to recover a device reference clock on the device, the device reference clock proportional to a host reference clock of the host, when clock signaling from the host to the device is unavailable. The controller may recover the device reference clock by measuring a ratio between the host reference clock and the device reference clock of the device by monitoring, with the device, host start-of-frame markers communicated from the host to the device via the input, creating a recovered reference clock based on the measured ratio, and creating local start-of-frame markers that are phase locked with the host start-of-frame markers based on the recovered reference clock.
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公开(公告)号：US11625214B2
公开(公告)日：2023-04-11
申请号：US16200917
申请日：2018-11-27
IPC分类号： G06F3/16
摘要： A system may include an audio coder-decoder (codec) having a plurality of digital-to-analog converters (DACs) and a plurality of analog-to-digital converters (ADCs), a serial interface communicatively coupled to the audio codec wherein the serial interface is configured to communicate audio streams to or from the audio codec, wherein the audio codec is configured to be configured as a device on the serial interface, and logic configured to control performance of a communication path within the audio codec based on one or more system conditions associated with the system.
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公开(公告)号：US11269509B2
公开(公告)日：2022-03-08
申请号：US17076489
申请日：2020-10-21
发明人： Hamid Sepehr , Pablo Peso Parada , Willem Zwart , Tom Birchall , Michael Allen Kost , Tejasvi Das , Siddharth Maru , Matthew Beardsworth , Bruce E. Duewer
摘要： A force sensing system for determining if a user input has occurred, the system comprising: an input channel, to receive an input from at least one force sensor; an activity detection stage, to monitor an activity level of the input from the at least one force sensor and, responsive to an activity level which may be indicative of a user input being reached, to generate an indication that an activity has occurred at the force sensor; and an event detection stage to receive said indication, and to determine if a user input has occurred based on the received input from the at least one force sensor.
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公开(公告)号：US20210358509A1
公开(公告)日：2021-11-18
申请号：US17443406
申请日：2021-07-26
发明人： Shafagh Kamkar , Dylan A. Hester , Bruce E. Duewer
摘要： A single-bit audio stream can be converted to a modified single-bit audio stream with a constant edge rate while maintaining a modulation index of the original audio stream using direct mapping. With direct mapping, a pre-filter bank may be combined with a multi-bit symbol mapper to select symbols for the modified audio stream with a constant edge rate per symbol and the same modulation index as the original audio stream. The output of the pre-filter bank may be an audio stream with no consecutive full-scale symbols. Using the output of the pre-filter bank, a multi-bit symbol mapper may use the symbol selector to output a symbol with a constant edge rate per symbol and the same modulation index as the original signal. The symbols may be converted to an analog signal for reproduction of audio content using a transducer.
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6.发明授权公开(公告)号：US10935620B2
公开(公告)日：2021-03-02
申请号：US16455437
申请日：2019-06-27
摘要： A system may include a resistive-inductive-capacitive sensor, a driver configured to drive the resistive-inductive-capacitive sensor with a driving signal at a driving frequency, and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to, during a calibration phase of the measurement circuit, measure phase and amplitude information associated with the resistive-inductive-capacitive sensor and based on the phase and amplitude information, determine at least one of a resonant frequency of the resistive-inductive-capacitive sensor and a transfer function of the resistive-inductive-capacitive sensor.
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公开(公告)号：US11621012B2
公开(公告)日：2023-04-04
申请号：US17443406
申请日：2021-07-26
发明人： Shafagh Kamkar , Dylan A. Hester , Bruce E. Duewer
摘要： A single-bit audio stream can be converted to a modified single-bit audio stream with a constant edge rate while maintaining a modulation index of the original audio stream using direct mapping. With direct mapping, a pre-filter bank may be combined with a multi-bit symbol mapper to select symbols for the modified audio stream with a constant edge rate per symbol and the same modulation index as the original audio stream. The output of the pre-filter bank may be an audio stream with no consecutive full-scale symbols. Using the output of the pre-filter bank, a multi-bit symbol mapper may use the symbol selector to output a symbol with a constant edge rate per symbol and the same modulation index as the original signal. The symbols may be converted to an analog signal for reproduction of audio content using a transducer.
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公开(公告)号：US11366550B2
公开(公告)日：2022-06-21
申请号：US16457489
申请日：2019-06-28
摘要： A system may include a plurality of actively-driven inductive sensors and a plurality of control circuits, each control circuit of the plurality of control circuits configured to control operation of a respective set of the actively-driven inductive sensors, each control circuit of the plurality of control circuits communicatively coupled to the other control circuits via a connection configured to distribute synchronization information among the plurality of control circuits. Each of the plurality of control circuits may further be configured to configure a schedule for controlling time-division multiplexed operation of its respective set of actively-driven inductive sensors and control time-division multiplexed operation of its respective set of actively-driven inductive sensors based on the schedule and the synchronization information in order to minimize interference among the plurality of actively-driven inductive sensors.
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公开(公告)号：US10890939B2
公开(公告)日：2021-01-12
申请号：US15926643
申请日：2018-03-20
IPC分类号： G06F1/04 , G06F1/10 , G06F13/38 , G06F1/3215 , G06F1/12 , G06F13/42 , G06F1/3234 , G06F1/08
摘要： A method for generating a not-yet (NYET) signal in a recovered reference system for recovering a device reference clock on a device, wherein the NYET signal indicates that the device is not yet ready for transition into a low power mode, in order to improve a quality of a recovered reference clock representative of a host reference clock of a host communicatively coupled to the device, may be provided. The method may include detecting receipt of start-of-frame markers from the host to the device, responsive to detecting receipt of the markers, determining whether a condition for NYET generation is being met, responsive to the condition for NYET generation being met, generating the NYET signal to cause the host to continue generating the markers, and responsive to the condition for NYET generation not being met, causing the device to generate an acknowledge signal for transition of the device into the low power mode.
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公开(公告)号：US10651860B2
公开(公告)日：2020-05-12
申请号：US15926424
申请日：2018-03-20
发明人： Jason Matocha , Marc Kobayashi , Bruce E. Duewer
摘要： A method of generating asynchronous feedback information for asynchronous, isochronous audio communication may include determining a relative change of stored samples in a device and generating the asynchronous feedback information provided to a host from the device based on the relative change. A method of generating asynchronous feedback information for asynchronous, isochronous audio communication may include determining a relative phase of a host clock for a host and a device clock for a device and generating the asynchronous feedback information provided to the host from the device based on the relative phase.
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