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61. 发明申请

US20220093108A1 SPEAKER IDENTIFICATION 有权
公开(公告)号：US20220093108A1
公开(公告)日：2022-03-24
申请号：US17540600
申请日：2021-12-02
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： John Paul LESSO
IPC分类号： G10L17/10 , G10L17/22 , G10L17/02 , G10L15/08 , G10L17/18 , G10L17/06
摘要： A method of speaker identification comprises receiving an audio signal representing speech; performing a first voice biometric process on the audio signal to attempt to identify whether the speech is the speech of an enrolled speaker; and, if the first voice biometric process makes an initial determination that the speech is the speech of an enrolled user, performing a second voice biometric process on the audio signal to attempt to identify whether the speech is the speech of the enrolled speaker. The second voice biometric process is selected to be more discriminative than the first voice biometric process.

62. 发明申请

US20220084541A1 METHODS, APPARATUS AND SYSTEMS FOR BIOMETRIC PROCESSES 有权
公开(公告)号：US20220084541A1
公开(公告)日：2022-03-17
申请号：US17507886
申请日：2021-10-22
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Thomas Ivan HARVEY , John Paul LESSO , William Erik SHERWOOD , Fredrick D. GEIGER
IPC分类号： G10L25/51 , A61B5/117 , H04R1/02 , H04R1/10 , H04R3/04 , G02B27/01 , G06F3/01 , H04R25/00
摘要： A method for use in a biometric process, comprising: with a headset in a known acoustic environment, applying an acoustic stimulus at a first transducer of the headset; receiving a response signal at a second transducer of the headset, the response signal comprising a component of the acoustic stimulus reflected at an obstacle in the acoustic path of the first transducer; determining a condition of the headset based on the response signal; and performing the biometric process based on the determined condition.

63. 发明授权

US11277129B2 Driver circuitry and operation 有权
公开(公告)号：US11277129B2
公开(公告)日：2022-03-15
申请号：US17314917
申请日：2021-05-07
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Axel Thomsen , Eric J. King , Anthony S. Doy , Thomas H. Hoff , John L. Melanson
IPC分类号： H03B1/00 , H03K3/00 , H03K17/687 , H02N2/00 , H02M3/158
摘要： This application relates to methods and apparatus for driving a transducer with switching drivers. A switching driver has first and second supply node for receiving supply voltages and includes an output bridge stage, a capacitor and a network of switches. The network of switches is operable in different switch states to provide different switching voltages to the output bridge stage. A controller is configured to control the switch state of the network of switches and a duty cycle of output switches of the output bridge stage based on an input signal to generate an output signal for driving the transducer.

64. 发明授权

US11271532B1 Amplifiers 有权
公开(公告)号：US11271532B1
公开(公告)日：2022-03-08
申请号：US16997409
申请日：2020-08-19
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： John P. Lesso
IPC分类号： H03F3/217 , H03F3/181
摘要： This application relates to an amplifier selectively operable in first or second modes. The first mode is a BTL mode with first and second output drivers (103p, 103n) both active to generate respective driving signals that vary with an input signal. The second mode is an SE mode, where the first output driver (103p) is active to generate a driving signal at and the output of the second driver (103n) is held constant. A controller (201) selectively controls the mode based on an indication of output signal amplitude. In the first mode, a ratio of magnitude of the two driving signals varies with the indication of output signal amplitude, i.e. the magnitudes of the two driving signals may vary so as to be not equal.

65. 发明申请

US20220060806A1 METHOD AND APPARATUS FOR ON EAR DETECT 有权
公开(公告)号：US20220060806A1
公开(公告)日：2022-02-24
申请号：US17384057
申请日：2021-07-23
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： John P. LESSO
IPC分类号： H04R1/10 , H04R29/00 , H04R3/00 , H04R1/08
摘要： A method for on ear detection for a headphone, the method comprising: receiving a first microphone signal derived from an first microphone of the headphone and determining, from the first microphone signal, a first resonance frequency associated with an acoustic port of the first microphone, the first resonance frequency dependent on a first temperature at the first microphone; receiving a second microphone signal derived from an second microphone of the headphone and determining, from the second microphone signal, a second resonance frequency associated with an acoustic port of the second microphone, the second resonance frequency dependent on a second temperature at the second microphone.

66. 发明授权

US11240578B2 Systems and methods for on ear detection of headsets 有权
公开(公告)号：US11240578B2
公开(公告)日：2022-02-01
申请号：US16724034
申请日：2019-12-20
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Brenton Steele
IPC分类号： H04R1/04 , H04R1/10 , H04R1/26 , H04R29/00
摘要： Described embodiments generally relate to a signal processing device for on ear detection for an earbud. The device comprises a first microphone input for receiving a microphone signal from a first microphone, the first microphone being configured to be positioned within an ear of a user when the earbud is being worn; a second microphone input for receiving a microphone signal from a second microphone, the second microphone being configured to be positioned outside the ear of the user when the earbud is being worn; a signal generator configured to generate a signal for acoustic playback from a speaker configured to be positioned within the earbud; and a processor. The processor is configured to receive at least one first microphone signal from each of the first microphone input and the second microphone input, and compare the first microphone signals to determine the on ear status of the earbud; determine that the on ear status of the earbud cannot be sufficiently determined, generate a signal for acoustic playback from the speaker, receive a second microphone signal from the first microphone input, and compare the second microphone signal to the generated signal to determine the on ear status of the earbud.

67. 发明申请

US20220029617A1 COMPENSATION FOR AIR GAP CHANGES AND TEMPERATURE CHANGES IN A RESONANT PHASE DETECTOR 有权
公开(公告)号：US20220029617A1
公开(公告)日：2022-01-27
申请号：US17494479
申请日：2021-10-05
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Matthew BEARDSWORTH , Tejasvi DAS , Siddharth MARU , Luke LAPOINTE
IPC分类号： H03K17/14 , H03K17/975 , H03K17/97
摘要： A system may include a sensor configured to output a sensor signal indicative of a distance between the sensor and a mechanical member associated with the sensor, a measurement circuit communicatively coupled to the sensor and configured to determine a physical force interaction with the mechanical member based on the sensor signal, and a compensator configured to monitor the sensor signal and to apply a compensation factor to the sensor signal to compensate for changes to properties of the sensor based on at least one of changes in a distance between the sensor and the mechanical member and changes in a temperature associated with the sensor.

68. 发明申请

US20220029532A1 CHARGE PUMP CIRCUIT 有权
公开(公告)号：US20220029532A1
公开(公告)日：2022-01-27
申请号：US17494424
申请日：2021-10-05
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： John P. Lesso , Peter J. Frith , John L. Pennock
IPC分类号： H02M3/07 , H03G3/30
摘要： A bipolar output charge pump circuit having a network of switching paths for selectively connecting an input node and a reference node for connection to an input voltage, a first pair of output nodes, two pairs of flying capacitor nodes, and a controller for controlling the switching of the network of switching paths. The controller is operable to control the network of switching paths when in use with two flying capacitors connected to the two pairs of flying capacitor nodes, to provide a first mode and a second mode when in use with two flying capacitors connected to the flying capacitor nodes, wherein at least the first mode corresponds to a bipolar output voltage of +/−3VV, +/−VV/5 or +/−VV/6.

69. 发明申请

US20220026989A1 INTEGRATED HAPTIC SYSTEM 有权
公开(公告)号：US20220026989A1
公开(公告)日：2022-01-27
申请号：US17495277
申请日：2021-10-06
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Harsha RAO , Rong HU , Carl Lennart STÅHL , Jie SU , Vadim KONRADI , Teemu RAMO , Anthony Stephen DOY
IPC分类号： G06F3/01 , G06F3/041 , G06F3/044
摘要： An integrated haptic system may include a digital signal processor and an amplifier communicatively coupled to the digital signal processor and integrated with the digital signal processor into the integrated haptic system. The digital signal processor may be configured to receive a force sensor signal indicative of a force applied to a force sensor and generate a haptic playback signal responsive to the force. The amplifier may be configured to amplify the haptic playback signal and drive a vibrational actuator communicatively coupled to the amplifier with the haptic playback signal as amplified by the amplifier.

70. 发明授权

US11233487B1 Amplifiers 有权
公开(公告)号：US11233487B1
公开(公告)日：2022-01-25
申请号：US17014283
申请日：2020-09-08
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： John Paul Lesso
IPC分类号： H03F99/00 , H03F3/217 , H03M3/00 , H04R3/00 , H04R17/00
摘要： The application describes method and apparatus for amplification. An amplifier circuit (300) is described for driving a load (101) connected between first and second output nodes (103p, 103n) based on an input signal (Sin). The amplifier circuit includes first and second signal paths for generating respective first and second driving signals (Soutp and Soutn) at the first and second output nodes, each of the first and second signal paths comprising a respective sigma-delta modulator (301p, 301n). A correlation controller (302) is configured to control the first and second signal paths to provide correlation between at least some noise components of the first and second driving signals.

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