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1. 发明申请

WO2022173562A1 CHOP TONE MANAGEMENT FOR A CURRENT SENSOR OR A VOLTAGE SENSOR 审中-公开
公开(公告)号：WO2022173562A1
公开(公告)日：2022-08-18
申请号：PCT/US2022/012882
申请日：2022-01-19
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. , KUMMARAGUNTLA, Ravi K.
发明人： AMADI, Christophe J. , MELANSON, John L. , THOMSEN, Axel , TUCKER, John C. , KING, Eric J.
IPC分类号： H03F3/38 , H03M1/06 , G01R19/25 , H03M1/12
摘要： A signal processing system may include a signal path and a chop management circuit. The signal path may comprise a chopper configured to chop a differential input signal to the signal path at a chopping frequency and a low-pass filter downstream of the chopper and configured to filter out intermodulation products of a direct current offset of the signal path and intermodulation products of an aggressor on the differential input signal in order to generate an output signal. The chop management circuit may be communicatively coupled to the chopper and configured to, based on operational parameters associated with the signal path, dynamically manage energy of one or more clock signals used to define the chopping frequency.

2. 发明申请

WO2022211958A1 GAIN AND MISMATCH CALIBRATION FOR A PHASE DETECTOR USED IN AN INDUCTIVE SENSOR 审中-公开
公开(公告)号：WO2022211958A1
公开(公告)日：2022-10-06
申请号：PCT/US2022/018475
申请日：2022-03-02
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. , DAS, Tejasvi
发明人： MARU, Siddharth , MELANSON, John L.
IPC分类号： G01D18/00 , G01D5/243 , G01N27/025 , G01N27/028
摘要： A system may include a resonant sensor configured to sense a physical quantity, a measurement circuit communicatively coupled to the resonant sensor and configured to measure one or more resonance parameters associated with the resonant sensor and indicative of the physical quantity using an incident/quadrature detector having an incident channel and a quadrature channel and perform a calibration of a non-ideality between the incident channel and the quadrature channel of the system, the calibration comprising determining the non-ideality by controlling the sensor signal, an oscillation signal for the incident channel, and an oscillation signal for the quadrature channel; and correcting for the non-ideality.

3. 发明申请

WO2021081160A1 MULTIPHASE INDUCTIVE BOOST CONVERTER WITH MULTIPLE OPERATIONAL PHASES 审中-公开
公开(公告)号：WO2021081160A1
公开(公告)日：2021-04-29
申请号：PCT/US2020/056782
申请日：2020-10-22
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. , KING, Eric J.
发明人： MELANSON, John L. , MACKAY, Graeme G. , ZHANG, Lingli
IPC分类号： H02J7/00 , H02M1/00 , H02M3/00 , H02M3/158
摘要： A battery management system configured to electrically couple to a battery may include a boost converter comprising a plurality of switches arranged to provide a boosted output voltage at an output of the boost converter from a source voltage of the battery and a bypass switch coupled between the battery and the output, wherein the battery management system is operable in a plurality of modes comprising a bypass mode wherein the source voltage is bypassed to the output and when the battery management system is in the bypass mode, at least one switch of the plurality of switches is enabled to increase a conductance between the battery and the output.

4. 发明申请

WO2019203887A1 A DUAL-PATH PULSE WIDTH MODULATION SYSTEM 审中-公开
公开(公告)号：WO2019203887A1
公开(公告)日：2019-10-24
申请号：PCT/US2018/054413
申请日：2018-10-04
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. , DAS, Tejasvi
发明人： DAS, Tejasvi , MORTON, Alan Mark , ZHAO, Xin , ZHU, Lei , FEI, Xiaofan , GABORIAU, Johann G. , MELANSON, John L. , VELLANKI, Amar
IPC分类号： H03F3/183 , H03F3/217
摘要： A system may include a digital pulse width modulator subsystem, a first path coupled to an output of the digital pulse width modulator subsystem, a second path coupled to the output of the digital pulse width modulator subsystem and configured to drive a closed-loop analog pulse width modulator, a controller to select between the first path and the second path for processing a signal based on one or more characteristics of the signal, wherein a first gain of the first path and a second gain of the second path are approximately equal at the time of switching selection between the first path and the second path or vice versa, in order to minimize artifacts due to the switching.

5. 发明申请

WO2019079035A1 CALIBRATION OF A DUAL-PATH PULSE WIDTH MODULATION SYSTEM 审中-公开
公开(公告)号：WO2019079035A1
公开(公告)日：2019-04-25
申请号：PCT/US2018/054186
申请日：2018-10-03
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. , DAS, Tejasvi
发明人： DAS, Tejasvi , MORTON, Alan Mark , ZHAO, Xin , ZHU, Lei , FEI, Xiaofan , GABORIAU, Johann G. , MELANSON, John L. , VELLANKI, Amar
IPC分类号： H03F3/183 , H03F3/217
摘要： A system may include a digital pulse width modulator subsystem, a first path coupled to an output of the digital pulse width modulator subsystem and configured to drive an open-loop driver stage, a second path coupled to the output of the digital pulse width modulator subsystem and configured to drive a closed-loop analog pulse width modulator, a controller to select between the first path and the second path for processing a signal based on one or more characteristics of the signal, and a calibration subsystem configured to calibrate at least one of a first gain of the first path and a second gain of the second path in order that the first gain and the second gain are at least approximately equal at the time of switching selection between the first path and the second path or vice versa, in order to minimize artifacts due to the switching.

6. 发明申请

WO2018004617A1 NEUTRALIZING VOLTAGE KICKBACK IN A SWITCHED CAPACITOR BASED DATA CONVERTER 审中-公开
标题翻译：在基于开关电容的数据转换器中的中和电压KICKBACK
公开(公告)号：WO2018004617A1
公开(公告)日：2018-01-04
申请号：PCT/US2016/040480
申请日：2016-06-30
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR, LTD. , DAS, Tejasvi
发明人： DAS, Tejasvi , MELANSON, John L. , ZANBAGHI, Ramin
IPC分类号： H03M3/00 , H03M1/08 , G11C27/02
CPC分类号： H03M3/322 , G11C27/026 , H03M1/0863 , H03M3/342 , H03M3/376 , H03M3/424 , H03M3/464 , H03M3/50
摘要： In accordance with embodiments of the present disclosure, a method of neutralizing voltage kickback associated with a reference buffer of a switched capacitor based data converter having a first switched capacitor coupled to an output node of the reference buffer wherein the first switched capacitor comprises at least one first capacitor and at least one first switch may be provided. The method may include coupling a passive network to the output node of the reference buffer in response to a presence of a condition for encountering the voltage kickback in order to create an approximately equal and opposite voltage kickforward by the passive network to at least partially neutralize the voltage kickback.
摘要翻译：根据本公开的实施例，一种中和与基于开关电容器的数据转换器的基准缓冲器相关联的电压反冲的方法，所述基于开关电容器的数据转换器具有耦合到基准缓冲器的输出节点的第一开关电容器，其中第一开关电容器包括至少一个第一电容器并且可以提供至少一个第一开关。该方法可以包括：响应于存在用于遇到电压反冲的条件，将无源网络耦合到参考缓冲器的输出节点，以便创建无源网络的近似相等且相反的电压，以至少部分地中和电压反冲。

7. 发明申请

WO2022203822A1 SENSITIVITY EQUALIZATION IN MULTI-SENSOR INDUCTIVE SENSING APPLICATIONS 审中-公开
公开(公告)号：WO2022203822A1
公开(公告)日：2022-09-29
申请号：PCT/US2022/018288
申请日：2022-03-01
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. , MARU, Siddharth
发明人： SANZ-ROBINSON, Josh , DAS, Tejasvi , MELANSON, John L.
IPC分类号： G01D5/244 , G01D18/00 , G01D5/243
摘要： A system may include a plurality of sensors configured to sense a physical quantity and a calibration subsystem configured to perform a calibration comprising: comparing a measured characteristic from each of at least two sensors of the plurality of sensors to determine a sensitivity drift of at least one sensor of the plurality of sensors; based on the measured characteristics of the at least two sensors and stored reference characteristics for the at least two sensors, calculating a normalization factor; and applying the normalization factor to the measured characteristic of the at least one sensor to ensure sensitivity of the plurality of sensors relative to each other remains approximately constant.

8. 发明申请

WO2019160880A4 FABRICATION OF INTEGRATED CIRCUIT INCLUDING PASSIVE ELECTRICAL COMPONENT 审中-公开
公开(公告)号：WO2019160880A4
公开(公告)日：2019-08-22
申请号：PCT/US2019/017711
申请日：2019-02-12
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. , WARRICK, Scott
发明人： LARSEN, Christian , KING, Eric J. , MELANSON, John L. , DOY, Anthony S. , BIVEN, David M.
IPC分类号： H01L23/522 , H01L23/31
摘要： A method for fabricating an integrated circuit upon a substrate may include forming a passive electrical component in a non-final layer of the integrated circuit and forming one or more electrical contacts in a final layer of the integrated circuit such that the one or more electrical contacts and the passive electrical component are positioned in a manner such that an imaginary line perpendicular to and from a surface of the substrate intersects the passive electrical component and the one or more electrical contacts.

9. 发明申请

WO2019160880A1 FABRICATION OF INTEGRATED CIRCUIT INCLUDING PASSIVE ELECTRICAL COMPONENT 审中-公开
公开(公告)号：WO2019160880A1
公开(公告)日：2019-08-22
申请号：PCT/US2019/017711
申请日：2019-02-12
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD. , WARRICK, Scott
发明人： LARSEN, Christian , KING, Eric J. , MELANSON, John L. , DOY, Anthony S. , BIVEN, David M.
IPC分类号： H01L23/522 , H01L23/31
摘要： A method for fabricating an integrated circuit upon a substrate may include forming a passive electrical component in a non-final layer of the integrated circuit and forming one or more electrical contacts in a final layer of the integrated circuit such that the one or more electrical contacts and the passive electrical component are positioned in a manner such that an imaginary line perpendicular to and from a surface of the substrate intersects the passive electrical component and the one or more electrical contacts.

10. 发明申请

WO2017160333A1 SYSTEMS AND METHODS FOR ADAPTIVE ACTIVE NOISE CANCELLATION FOR MULTIPLE-DRIVER PERSONAL AUDIO DEVICE 审中-公开
标题翻译：用于多驱动器个人音频设备的自适应主动噪声消除的系统和方法
公开(公告)号：WO2017160333A1
公开(公告)日：2017-09-21
申请号：PCT/US2016/039523
申请日：2016-06-27
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR, LTD. , KWATRA, Nitin
发明人： KWATRA, Nitin , HENDRIX, Jon D. , MELANSON, John L.
IPC分类号： H04R3/12 , G10K11/178
CPC分类号： G10K11/178 , G10K11/17879 , G10K11/17885 , G10K2210/1081 , H04R3/12 , H04R2205/022
摘要： In accordance with embodiments of the present disclosure, a processing circuit may implement an adaptive filter, a first signal injection portion which injects a first additional signal into a first frequency range content source audio signal, and a second signal injection portion which injects a second additional signal into a second frequency range content source audio signal, wherein the first additional signal and the second additional signal are substantially different. The adaptive filter may have a response that generates the antinoise signal from the reference microphone signal to reduce the presence of the ambient audio sounds at the acoustic output, wherein the response of the adaptive filter is shaped in conformity with the reference microphone signal and the error microphone signal by adapting the response of the adaptive filter to minimize the ambient audio sounds in the error microphone signal, wherein the antinoise signal is combined with at least the first frequency range content source audio signal.
摘要翻译：根据本公开的实施例，处理电路可以实施自适应滤波器，将第一附加信号注入到第一频率范围内容源音频信号中的第一信号注入部分，以及第二信号注入部分信号注入部分，其将第二附加信号注入到第二频率范围内容源音频信号中，其中第一附加信号和第二附加信号基本上不同。自适应滤波器可以具有响应，该响应从参考麦克风信号生成抗噪声信号以减少声学输出处的环境音频声音的存在，其中自适应滤波器的响应被成形为与参考麦克风信号一致并且误差通过调整自适应滤波器的响应以最小化误差麦克风信号中的环境音频声音，其中抗噪声信号与至少第一频率范围内容源音频信号组合。

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