Patents by Inventor Carl L. Stahl
Carl L. Stahl 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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Patent number: 11972057Abstract: Embodiments described herein relate to methods and apparatuses for controlling an operation of a vibrational output system and/or an operation of an input sensor system, wherein the controller is for use in a device comprising the vibrational output system and the input sensor system. A controller comprises an input configured to receive an indication of activation or de-activation of an output of the vibrational output system; and an adjustment module configured to adjust the operation of the vibrational output system and/or the operation of the input sensor system based on the indication to reduce an interference expected to be caused by the output of the vibrational output system on the input sensory system.Type: GrantFiled: April 25, 2023Date of Patent: April 30, 2024Assignee: Cirrus Logic Inc.Inventors: Tejasvi Das, Matthew Beardsworth, Michael A. Kost, Gavin McVeigh, Hamid Sepehr, Carl L. Ståhl
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Publication number: 20230259214Abstract: Embodiments described herein relate to methods and apparatuses for controlling an operation of a vibrational output system and/or an operation of an input sensor system, wherein the controller is for use in a device comprising the vibrational output system and the input sensor system. A controller comprises an input configured to receive an indication of activation or de-activation of an output of the vibrational output system; and an adjustment module configured to adjust the operation of the vibrational output system and/or the operation of the input sensor system based on the indication to reduce an interference expected to be caused by the output of the vibrational output system on the input sensory system.Type: ApplicationFiled: April 25, 2023Publication date: August 17, 2023Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Tejasvi DAS, Matthew BEARDSWORTH, Michael A. KOST, Gavin MCVEIGH, Hamid SEPEHR, Carl L. STÅHL
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Publication number: 20230196889Abstract: Embodiments described herein relate to methods and apparatus for outputting a haptic signal to a haptic transducer. A method for triggering a haptic signal being output to a haptic transducer comprises receiving an audio signal for output through an audio output transducer; determining whether the audio signal comprises a haptic trigger based on an indication of a rate of change of an amplitude of the audio signal, and responsive to determining that the audio signal comprises a haptic trigger, triggering the haptic signal to be output to the haptic transducer.Type: ApplicationFiled: February 16, 2023Publication date: June 22, 2023Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Anthony S. DOY, Nermin OSMANOVIC, Carl L. STÅHL
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Patent number: 11669165Abstract: Embodiments described herein relate to methods and apparatuses for controlling an operation of a vibrational output system and/or an operation of an input sensor system, wherein the controller is for use in a device comprising the vibrational output system and the input sensor system. A controller comprises an input configured to receive an indication of activation or de-activation of an output of the vibrational output system; and an adjustment module configured to adjust the operation of the vibrational output system and/or the operation of the input sensor system based on the indication to reduce an interference expected to be caused by the output of the vibrational output system on the input sensory system.Type: GrantFiled: March 3, 2021Date of Patent: June 6, 2023Assignee: Cirrus Logic, Inc.Inventors: Tejasvi Das, Matthew Beardsworth, Michael A. Kost, Gavin McVeigh, Hamid Sepehr, Carl L. Ståhl
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Patent number: 11636742Abstract: Embodiments described herein relate to methods and apparatus for outputting a haptic signal to a haptic transducer. A method for triggering a haptic signal being output to a haptic transducer comprises receiving an audio signal for output through an audio output transducer; determining whether the audio signal comprises a haptic trigger based on an indication of a rate of change of an amplitude of the audio signal, and responsive to determining that the audio signal comprises a haptic trigger, triggering the haptic signal to be output to the haptic transducer.Type: GrantFiled: September 25, 2020Date of Patent: April 25, 2023Assignee: Cirrus Logic, Inc.Inventors: Anthony S. Doy, Nermin Osmanovic, Carl L. Ståhl
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Patent number: 11263877Abstract: A method for identifying a mechanical impedance of an electromagnetic load may include generating a waveform signal for driving an electromagnetic load, the waveform signal comprising a first tone at a first driving frequency and a second tone at a second driving frequency. The method may also include during driving of the electromagnetic load by the waveform signal or a signal derived therefrom, receiving a current signal representative of a current associated with the electromagnetic load and a back electromotive force signal representative of a back electromotive force associated with the electromagnetic load.Type: GrantFiled: June 19, 2020Date of Patent: March 1, 2022Assignee: Cirrus Logic, Inc.Inventors: Emmanuel Marchais, Eric Lindemann, Carl L. Ståhl
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Patent number: 11238709Abstract: A system includes a sequencer that divides a reference waveform into reference sequences, a sequence adjuster, and a model that models non-linearities of a haptic rendering signal chain that includes a haptic transducer load and a driver to the load. For each reference sequence: the sequence adjuster transforms the reference sequence into a test sequence using one or more parameters (e.g., changes reference sequence amplitude and/or period), the model generates an output in response to the test sequence, an error signal is generated that measures a difference between the output and the reference sequence, and if the error signal is above a threshold the parameters are adjusted based on the error signal. These operations are repeated until the error signal is below the threshold in which case the test sequence becomes a selected sequence, which is then sent to the haptic rendering signal chain.Type: GrantFiled: April 6, 2020Date of Patent: February 1, 2022Assignee: Cirrus Logic, Inc.Inventors: Emmanuel Marchais, Eric Lindemann, Carl L. Stahl
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Publication number: 20210200316Abstract: Embodiments described herein relate to methods and apparatuses for controlling an operation of a vibrational output system and/or an operation of an input sensor system, wherein the controller is for use in a device comprising the vibrational output system and the input sensor system. A controller comprises an input configured to receive an indication of activation or de-activation of an output of the vibrational output system; and an adjustment module configured to adjust the operation of the vibrational output system and/or the operation of the input sensor system based on the indication to reduce an interference expected to be caused by the output of the vibrational output system on the input sensory system.Type: ApplicationFiled: March 3, 2021Publication date: July 1, 2021Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Tejasvi DAS, Matthew BEARDSWORTH, Michael A. KOST, Gavin MCVEIGH, Hamid SEPEHR, Carl L. STÅHL
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Patent number: 10976825Abstract: Embodiments described herein relate to methods and apparatuses for controlling an operation of a vibrational output system and/or an operation of an input sensor system, wherein the controller is for use in a device comprising the vibrational output system and the input sensor system. A controller comprises an input configured to receive an indication of activation or de-activation of an output of the vibrational output system; and an adjustment module configured to adjust the operation of the vibrational output system and/or the operation of the input sensor system based on the indication to reduce an interference expected to be caused by the output of the vibrational output system on the input sensory system.Type: GrantFiled: October 22, 2019Date of Patent: April 13, 2021Assignee: Cirrus Logic, Inc.Inventors: Tejasvi Das, Matthew Beardsworth, Michael Allan Kost, Gavin McVeigh, Hamid Sepehr, Carl L. Ståhl
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Publication number: 20210012628Abstract: Embodiments described herein relate to methods and apparatus for outputting a haptic signal to a haptic transducer. A method for triggering a haptic signal being output to a haptic transducer comprises receiving an audio signal for output through an audio output transducer; determining whether the audio signal comprises a haptic trigger based on an indication of a rate of change of an amplitude of the audio signal, and responsive to determining that the audio signal comprises a haptic trigger, triggering the haptic signal to be output to the haptic transducer.Type: ApplicationFiled: September 25, 2020Publication date: January 14, 2021Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Anthony S. DOY, Nermin OSMANOVIC, Carl L. STÅHL
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Patent number: 10832537Abstract: Embodiments described herein relate to methods and apparatus for outputting a haptic signal to a haptic transducer. A method for triggering a haptic signal being output to a haptic transducer comprises receiving an audio signal for output through an audio output transducer; determining whether the audio signal comprises a haptic trigger based on an indication of a rate of change of an amplitude of the audio signal, and responsive to determining that the audio signal comprises a haptic trigger, triggering the haptic signal to be output to the haptic transducer.Type: GrantFiled: February 28, 2019Date of Patent: November 10, 2020Assignee: Cirrus Logic, Inc.Inventors: Anthony S. Doy, Nermin Osmanovic, Carl L. Ståhl
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Publication number: 20200342724Abstract: A system includes a sequencer that divides a reference waveform into reference sequences, a sequence adjuster, and a model that models non-linearities of a haptic rendering signal chain that includes a haptic transducer load and a driver to the load. For each reference sequence: the sequence adjuster transforms the reference sequence into a test sequence using one or more parameters (e.g., changes reference sequence amplitude and/or period), the model generates an output in response to the test sequence, an error signal is generated that measures a difference between the output and the reference sequence, and if the error signal is above a threshold the parameters are adjusted based on the error signal. These operations are repeated until the error signal is below the threshold in which case the test sequence becomes a selected sequence, which is then sent to the haptic rendering signal chain.Type: ApplicationFiled: April 6, 2020Publication date: October 29, 2020Inventors: Emmanuel Marchais, Eric Lindemann, Carl L. Stahl
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Publication number: 20200320834Abstract: A method for identifying a mechanical impedance of an electromagnetic load may include generating a waveform signal for driving an electromagnetic load, the waveform signal comprising a first tone at a first driving frequency and a second tone at a second driving frequency. The method may also include during driving of the electromagnetic load by the waveform signal or a signal derived therefrom, receiving a current signal representative of a current associated with the electromagnetic load and a back electromotive force signal representative of a back electromotive force associated with the electromagnetic load.Type: ApplicationFiled: June 19, 2020Publication date: October 8, 2020Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Emmanuel MARCHAIS, Eric LINDEMANN, Carl L. STÅHL
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Patent number: 10726683Abstract: A method for identifying a mechanical impedance of an electromagnetic load may include generating a waveform signal for driving an electromagnetic load, the waveform signal comprising a first tone at a first driving frequency and a second tone at a second driving frequency. The method may also include during driving of the electromagnetic load by the waveform signal or a signal derived therefrom, receiving a current signal representative of a current associated with the electromagnetic load and a back electromotive force signal representative of a back electromotive force associated with the electromagnetic load.Type: GrantFiled: August 30, 2019Date of Patent: July 28, 2020Assignee: Cirrus Logic, Inc.Inventors: Emmanuel Marchais, Eric Lindemann, Carl L. Ståhl
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Publication number: 20190311590Abstract: Embodiments described herein relate to methods and apparatus for outputting a haptic signal to a haptic transducer. A method for triggering a haptic signal being output to a haptic transducer comprises receiving an audio signal for output through an audio output transducer; determining whether the audio signal comprises a haptic trigger based on an indication of a rate of change of an amplitude of the audio signal, and responsive to determining that the audio signal comprises a haptic trigger, triggering the haptic signal to be output to the haptic transducer.Type: ApplicationFiled: February 28, 2019Publication date: October 10, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Anthony S. DOY, Nermin OSMANOVIC, Carl L. STÅHL