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71. 发明申请

US20220247372A1 CURRENT SENSING CIRCUITRY 有权
公开(公告)号：US20220247372A1
公开(公告)日：2022-08-04
申请号：US17162229
申请日：2021-01-29
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Wei XU , Ravi KUMMARAGUNTLA , Paul WILSON , Mujo KOZAK , Christian LARSEN , John L. MELANSON , Yongjie CHENG
IPC分类号： H03F3/45
摘要： A system may include a front end differential amplifier having two input terminals, two input resistors, each of the two input resistors coupled to a respective one of the two input terminals, and an input common mode biasing circuit for an output stage of the front end differential amplifier, the input common mode biasing circuit comprising two current sources configured to generate currents for biasing the output stage of the front end differential amplifier.

72. 发明申请

US20220245074A1 TIMING ADJUSTMENT TO UNUSED UNIT-INTERVAL ON SHARED DATA BUS 有权
公开(公告)号：US20220245074A1
公开(公告)日：2022-08-04
申请号：US17166231
申请日：2021-02-03
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Nitin Kwatra
IPC分类号： G06F13/20
摘要： Calibrating devices communicating on the shared bus can assist in reducing conflicts on the bus and the resulting loss of data. For example, the timing of transmission of data from one device to another device on the shared bus may be adjusted to compensate for delays on the shared bus. For example, the transmitting device may adjust transmission to an earlier time than the programmed time by an amount proportional to a known delay, such that the signal arrives at a receiving device at the programmed time. When the adjustment is not able to obtain a desired alignment or would cause conflicts on the shared data bus, the timing may be adjusted to delay the transmission, rather than advance the transmission, such that the adjusted transmission time results in the receipt of the signal at the receiving device in an unused time window after the programmed time.

73. 发明申请

US20220231775A1 DEVICE CALBRATION FOR ISOCHRONOUS CHANNEL COMMUNICATION 有权
公开(公告)号：US20220231775A1
公开(公告)日：2022-07-21
申请号：US17150170
申请日：2021-01-15
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Anthony Louviere , John L. Melanson , Gabriel Vogel
IPC分类号： H04J3/06 , H04L12/40 , H04B1/40
摘要： Calibration of devices communicating on a shared data bus may improve data integrity on the shared data bus by reducing duty cycle distortion. Duty cycle distortion may be reduced by adjusting timing of a transceiver in a device for communicating on the shared data bus using calibration codes. The calibration codes may be loaded into memory and used to reconfigure the transceiver timing on the shared data bus with reconfiguration occurring within one or more unit-intervals of time. The calibration code may be used, for example, to adjust a PMOS or NMOS trim circuit at the transceiver.

74. 发明申请

US20220229937A1 INTEGRATED CIRCUIT WITH ASYMMETRIC ACCESS PRIVILEGES 有权
公开(公告)号：US20220229937A1
公开(公告)日：2022-07-21
申请号：US17394014
申请日：2021-08-04
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Michael CHANDLER-PAGE , Pradeep SAMINATHAN , Jon EKLUND , Neil WHYTE , José Arnaldo BIANCO FILHO , Abhinav SHARMA
IPC分类号： G06F21/71 , G06F9/4401
摘要： An integrated circuit comprises first and second interfaces, an internal addressable space comprising a plurality of address ranges, and a control unit. Each of the first and second interfaces is coupled to the internal addressable space via the control unit. The control unit is configurable in a first state in which the control unit is configured to allow or deny the second interface access to a subset of the plurality of address ranges of the internal addressable space.

75. 发明申请

US20220229784A1 INTEGRATED CIRCUIT WITH ASYMMETRIC ACCESS PRIVILEGES 有权
公开(公告)号：US20220229784A1
公开(公告)日：2022-07-21
申请号：US17232514
申请日：2021-04-16
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Neil WHYTE , Michael CHANDLER-PAGE , Pradeep SAMINATHAN , Jon EKLUND
IPC分类号： G06F12/14 , G06F13/16
摘要： An integrated circuit comprises first and second interfaces, an internal addressable space comprising a plurality of address ranges, and a control unit. Each of the first and second interfaces is coupled to the internal addressable space via the control unit. The control unit is configurable in a first state in which the control unit is configured to allow or deny the second interface access to a subset of the plurality of address ranges of the internal addressable space.

76. 发明申请

US20220221505A1 SYSTEM AND METHOD FOR SEMICONDUCTOR DEVICE RANDOM TELEGRAPH SEQUENCE NOISE TESTING 有权
公开(公告)号：US20220221505A1
公开(公告)日：2022-07-14
申请号：US17148371
申请日：2021-01-13
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Aleksey S. Khenkin , John C. Tucker , John L. Melanson , Jeffrey A. Weintraub
IPC分类号： G01R31/26 , G01R31/28
摘要： A method for screening a semiconductor device for production of excessive random telegraph sequence (RTS) noise includes measuring noise of the semiconductor device at a first temperature, changing the temperature of the semiconductor device to a second temperature different from the first temperature, measuring noise of the semiconductor device at the second temperature, extracting a characteristic of the measured noise at the first and second temperatures (e.g., standard deviation, HMM output, frequency domain spectrum of time domain noise measurement), making a comparison of the extracted first and second noise characteristics, and making a determination whether the semiconductor device produces excessive RTS noise based on whether the comparison is above a predetermined threshold. Two different bias conditions of the device may be employed rather than, or in addition to, the two different temperatures.

77. 发明申请

US20220158635A1 DRIVER CIRCUITRY AND OPERATION 有权
公开(公告)号：US20220158635A1
公开(公告)日：2022-05-19
申请号：US17590943
申请日：2022-02-02
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： 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.

78. 发明申请

US20220158070A1 DRIVER CIRCUITRY 有权
公开(公告)号：US20220158070A1
公开(公告)日：2022-05-19
申请号：US16951032
申请日：2020-11-18
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： John P. LESSO , Anthony S. DOY
IPC分类号： H01L41/04 , B06B1/02
摘要： The present disclosure relates to circuitry for driving a piezoelectric transducer. The circuitry comprises pre-processor circuitry configured to process an input signal to generate a processed signal; driver circuitry coupled to the pre-processor circuitry and configured to generate a drive signal, based on the processed signal, for driving the piezoelectric transducer; and processor circuitry configured to determine a resonant frequency of the piezoelectric transducer. The pre-processor circuitry is configured to process the input signal based on the determined resonant frequency so as to generate the processed signal.

79. 发明申请

US20220157334A1 DETECTION OF LIVE SPEECH 有权
公开(公告)号：US20220157334A1
公开(公告)日：2022-05-19
申请号：US16953104
申请日：2020-11-19
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： César ALONSO
IPC分类号： G10L25/93 , G10L25/18 , G10L25/21 , G10L15/22 , G10L25/78
摘要： A method of detecting live speech comprises: receiving a signal containing speech; forming a framed version of the received signal that comprises a plurality of frames; forming a first subset of the plurality of frames, wherein each frame of the first subset contains a signal that contains voiced speech; forming a second subset of the plurality of frames, wherein each frame of the second subset contains a signal that contains unvoiced speech; forming a first frame that is representative of a sum of a plurality of frames of the first subset; forming a second frame that is representative of a sum of a plurality of frames of the second subset; performing a time-frequency transformation operation on the first frame, to form an average voiced frequency spectrum; performing a time-frequency transformation operation on the second frame, to form an average unvoiced frequency spectrum; obtaining one or more voiced features from the voiced frequency spectrum; and obtaining one or more unvoiced features from the unvoiced frequency spectrum. Based on the one or more voiced features and the one or more unvoiced features, a determination is made whether the speech is live speech, or not.

80. 发明申请

US20220143651A1 DRIVER CIRCUITRY 有权
公开(公告)号：US20220143651A1
公开(公告)日：2022-05-12
申请号：US17092613
申请日：2020-11-09
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： John P. LESSO , Toru IDO
IPC分类号： B06B1/02 , B06B1/06
摘要： The present disclosure relates to circuitry for driving a load. The circuitry comprises driver circuitry configured to generate a drive signal, based on an input signal to the driver circuitry, for driving the load, and commutator circuitry for coupling the driver circuitry to the load. The commutator circuitry is configured to alternate between commutation states in response to a level of the drive signal meeting a drive signal threshold or in response to a level of the input signal meeting a first input signal threshold. The circuitry is configured to apply an offset to the input signal when the input signal is below a second input signal threshold so as to increase a minimum level of the drive signal above the drive signal threshold or to increase a minimum level of the input signal above the first input signal threshold.

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