Patents by Inventor Mark James McCloy-Stevens
Mark James McCloy-Stevens has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230247362Abstract: This application relates to audio driving circuitry (100), and in particular to audio driving circuitry for outputting first and second audio driving signals for driving a stereo audio load (106), which may be a stereo audio load of an accessory apparatus (102) removably coupled to the audio driving circuitry in use. A load monitor (111) is provided for monitoring to monitor, from a monitoring node (112), an indication of a common mode return current passing through a common return path, together with an indication of a common mode component of the first and second audio driving signals and to determine an impedance characteristic of the stereo audio load. The load monitor (111) can provide dynamic monitoring of any significant change in load impedance. In some embodiments the load monitor (111) comprises an adaptive filter (301) which adapts a parameter of the filter which is related to the load impedance so as to determine the indication of load impedance.Type: ApplicationFiled: April 5, 2023Publication date: August 3, 2023Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: John Paul LESSO, Mark James MCCLOY-STEVENS, John Bruce BOWLERWELL, Yanto SURYONO, Xin ZHAO, Morgan Timothy PRIOR
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Patent number: 11653150Abstract: This application relates to audio driving circuitry (100), and in particular to audio driving circuitry for outputting first and second audio driving signals for driving a stereo audio load (106), which may be a stereo audio load of an accessory apparatus (102) removably coupled to the audio driving circuitry in use. A load monitor (111) is provided for monitoring to monitor, from a monitoring node (112), an indication of a common mode return current passing through a common return path, together with an indication of a common mode component of the first and second audio driving signals and to determine an impedance characteristic of the stereo audio load. The load monitor (111) can provide dynamic monitoring of any significant change in load impedance. In some embodiments the load monitor (111) comprises an adaptive filter (301) which adapts a parameter of the filter which is related to the load impedance so as to determine the indication of load impedance.Type: GrantFiled: November 2, 2021Date of Patent: May 16, 2023Assignee: Cirrus Logic, Inc.Inventors: John Paul Lesso, Mark James McCloy-Stevens, John Bruce Bowlerwell, Yanto Suryono, Xin Zhao, Morgan Timothy Prior
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Publication number: 20220060832Abstract: This application relates to audio driving circuitry (100), and in particular to audio driving circuitry for outputting first and second audio driving signals for driving a stereo audio load (106), which may be a stereo audio load of an accessory apparatus (102) removably coupled to the audio driving circuitry in use. A load monitor (111) is provided for monitoring to monitor, from a monitoring node (112), an indication of a common mode return current passing through a common return path, together with an indication of a common mode component of the first and second audio driving signals and to determine an impedance characteristic of the stereo audio load. The load monitor (111) can provide dynamic monitoring of any significant change in load impedance. In some embodiments the load monitor (111) comprises an adaptive filter (301) which adapts a parameter of the filter which is related to the load impedance so as to determine the indication of load impedance.Type: ApplicationFiled: November 2, 2021Publication date: February 24, 2022Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: John Paul LESSO, Mark James MCCLOY-STEVENS, John Bruce BOWLERWELL, Yanto SURYONO, Xin ZHAO, Morgan Timothy PRIOR
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Patent number: 11206487Abstract: This application relates to audio driving circuitry (100), and in particular to audio driving circuitry for outputting first and second audio driving signals for driving a stereo audio load (106), which may be a stereo audio load of an accessory apparatus (102) removably coupled to the audio driving circuitry in use. A load monitor (111) is provided for monitoring to monitor, from a monitoring node (112), an indication of a common mode return current passing through a common return path, together with an indication of a common mode component of the first and second audio driving signals and to determine an impedance characteristic of the stereo audio load. The load monitor (111) can provide dynamic monitoring of any significant change in load impedance. In some embodiments the load monitor (111) comprises an adaptive filter (301) which adapts a parameter of the filter which is related to the load impedance so as to determine the indication of load impedance.Type: GrantFiled: December 10, 2019Date of Patent: December 21, 2021Assignee: Cirrus Logic, Inc.Inventors: John Paul Lesso, Mark James Mccloy-Stevens, John Bruce Bowlerwell, Yanto Suryono, Xin Zhao, Morgan Timothy Prior
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Publication number: 20200186927Abstract: This application relates to audio driving circuitry (100), and in particular to audio driving circuitry for outputting first and second audio driving signals for driving a stereo audio load (106), which may be a stereo audio load of an accessory apparatus (102) removably coupled to the audio driving circuitry in use. A load monitor (111) is provided for monitoring to monitor, from a monitoring node (112), an indication of a common mode return current passing through a common return path, together with an indication of a common mode component of the first and second audio driving signals and to determine an impedance characteristic of the stereo audio load. The load monitor (111) can provide dynamic monitoring of any significant change in load impedance. In some embodiments the load monitor (111) comprises an adaptive filter (301) which adapts a parameter of the filter which is related to the load impedance so as to determine the indication of load impedance.Type: ApplicationFiled: December 10, 2019Publication date: June 11, 2020Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: John Paul LESSO, Mark James MCCLOY-STEVENS, John Bruce BOWLERWELL, Yanto SURYONO, Xin ZHAO, Morgan Timothy PRIOR
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Publication number: 20120062190Abstract: This application relates to switch mode DC-DC converter circuitry having a power switch operably connected between a supply node and an inductor node. The DC-DC converter has switch control circuitry for driving the power switch which is configured to controllably vary the rate of at least one of turn-on or turn-off of the first power switch. The rate may be based on the operational conditions of the converter, e.g. inductor current, one or more supply voltages and/or operating mode or activity level of a host device. By increasing the rate at which the switch turns-on or off switch transition power losses can be reduced. However a faster switching speed can lead to an increased voltage stress on the circuitry. Embodiments of the present invention varying the rate or turn-on and/or turn-off of the switch to reduce power losses but remain with the safe operating limits for the circuitry.Type: ApplicationFiled: September 9, 2011Publication date: March 15, 2012Inventors: Holger Haiplik, Seyed Hamed Sadati, Mark James McCloy-Stevens