Patents by Inventor Graeme Mackay
Graeme Mackay 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: 10901012Abstract: A method for calculating a calibration gain used for common-mode rejection in a current sensing system may include measuring a first value of a common-mode voltage associated with the current sensing system and a first output value of the current sensing system occurring at the first value of the common-mode voltage, measuring a second value of the common-mode voltage associated with the current sensing system and a second output value of the current sensing system occurring at the second value of the common-mode voltage, and based on a difference between the second output value of the current sensing system and the first output value of the current sensing system and a difference between the second value of the common-mode voltage and the first value of the common-mode voltage, calculating the calibration gain.Type: GrantFiled: March 15, 2019Date of Patent: January 26, 2021Assignee: Cirrus Logic, Inc.Inventors: Katy Holland, Vamsikrishna Parupalli, Christian Larsen, Graeme Mackay
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Publication number: 20190293691Abstract: A method for calculating a calibration gain used for common-mode rejection in a current sensing system may include measuring a first value of a common-mode voltage associated with the current sensing system and a first output value of the current sensing system occurring at the first value of the common-mode voltage, measuring a second value of the common-mode voltage associated with the current sensing system and a second output value of the current sensing system occurring at the second value of the common-mode voltage, and based on a difference between the second output value of the current sensing system and the first output value of the current sensing system and a difference between the second value of the common-mode voltage and the first value of the common-mode voltage, calculating the calibration gain.Type: ApplicationFiled: March 15, 2019Publication date: September 26, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Katy HOLLAND, Vamsikrishna PARUPALLI, Christian LARSEN, Graeme MACKAY
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Patent number: 10182285Abstract: Circuitry detects properties of an accessory removably connected thereto via a multi-pole connector. The circuitry has first, second and third circuit terminals for coupling to respective first, second, and third poles of said connector, and has an output for providing evaluation values from which properties of the accessory may be derived. In the circuitry, first current sourcing circuitry is coupled to said first circuit terminal for providing a first current. A switch network comprises first, second, third and fourth switch network terminals, said first switch network terminal coupled to a reference potential, said second switch network terminal coupled to said second circuit terminal, and said third switch network terminal coupled to said third circuit terminal. Comparator circuitry provides a comparison signal, its first input terminal being coupled to said first circuit terminal.Type: GrantFiled: February 20, 2018Date of Patent: January 15, 2019Assignee: Cirrus Logic, Inc.Inventors: Graeme MacKay, Andrew Bothwell
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Patent number: 10149042Abstract: Circuitry detects properties of an accessory removably connected thereto via a multi-pole connector. The circuitry has first, second and third circuit terminals for coupling to respective first, second, and third poles of said connector, and has an output for providing evaluation values from which properties of the accessory may be derived. In the circuitry, first current sourcing circuitry is coupled to said first circuit terminal for providing a first current. A switch network comprises first, second, third and fourth switch network terminals, said first switch network terminal coupled to a reference potential, said second switch network terminal coupled to said second circuit terminal, and said third switch network terminal coupled to said third circuit terminal. Comparator circuitry provides a comparison signal, its first input terminal being coupled to said first circuit terminal.Type: GrantFiled: February 20, 2018Date of Patent: December 4, 2018Assignee: Cirrus Logic, Inc.Inventors: Graeme MacKay, Andrew Bothwell
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Publication number: 20180192183Abstract: Circuitry detects properties of an accessory removably connected thereto via a multi-pole connector. The circuitry has first, second and third circuit terminals for coupling to respective first, second, and third poles of said connector, and has an output for providing evaluation values from which properties of the accessory may be derived. In the circuitry, first current sourcing circuitry is coupled to said first circuit terminal for providing a first current. A switch network comprises first, second, third and fourth switch network terminals, said first switch network terminal coupled to a reference potential, said second switch network terminal coupled to said second circuit terminal, and said third switch network terminal coupled to said third circuit terminal. Comparator circuitry provides a comparison signal, its first input terminal being coupled to said first circuit terminal.Type: ApplicationFiled: February 20, 2018Publication date: July 5, 2018Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Graeme MACKAY, Andrew BOTHWELL
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Publication number: 20180176675Abstract: Circuitry detects properties of an accessory removably connected thereto via a multi-pole connector. The circuitry has first, second and third circuit terminals for coupling to respective first, second, and third poles of said connector, and has an output for providing evaluation values from which properties of the accessory may be derived. In the circuitry, first current sourcing circuitry is coupled to said first circuit terminal for providing a first current. A switch network comprises first, second, third and fourth switch network terminals, said first switch network terminal coupled to a reference potential, said second switch network terminal coupled to said second circuit terminal, and said third switch network terminal coupled to said third circuit terminal. Comparator circuitry provides a comparison signal, its first input terminal being coupled to said first circuit terminal.Type: ApplicationFiled: February 20, 2018Publication date: June 21, 2018Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Graeme MACKAY, Andrew BOTHWELL
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Patent number: 9986327Abstract: Circuitry detects properties of an accessory removably connected thereto via a multi-pole connector. The circuitry has first, second and third circuit terminals for coupling to respective first, second, and third poles of said connector, and has an output for providing evaluation values from which properties of the accessory may be derived. In the circuitry, first current sourcing circuitry is coupled to said first circuit terminal for providing a first current. A switch network comprises first, second, third and fourth switch network terminals, said first switch network terminal coupled to a reference potential, said second switch network terminal coupled to said second circuit terminal, and said third switch network terminal coupled to said third circuit terminal. Comparator circuitry provides a comparison signal, its first input terminal being coupled to said first circuit terminal.Type: GrantFiled: February 23, 2017Date of Patent: May 29, 2018Assignee: Cirrus Logic, Inc.Inventors: Graeme Mackay, Andrew Bothwell
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Publication number: 20170164094Abstract: Circuitry detects properties of an accessory removably connected thereto via a multi-pole connector. The circuitry has first, second and third circuit terminals for coupling to respective first, second, and third poles of said connector, and has an output for providing evaluation values from which properties of the accessory may be derived. In the circuitry, first current sourcing circuitry is coupled to said first circuit terminal for providing a first current. A switch network comprises first, second, third and fourth switch network terminals, said first switch network terminal coupled to a reference potential, said second switch network terminal coupled to said second circuit terminal, and said third switch network terminal coupled to said third circuit terminal. Comparator circuitry provides a comparison signal, its first input terminal being coupled to said first circuit terminal.Type: ApplicationFiled: February 23, 2017Publication date: June 8, 2017Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Graeme MACKAY, Andrew BOTHWELL
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Patent number: 9609425Abstract: Circuitry detects properties of an accessory removably connected thereto via a multi-pole connector. The circuitry has first, second and third circuit terminals for coupling to respective first, second, and third poles of said connector, and has an output for providing evaluation values from which properties of the accessory may be derived. In the circuitry, first current sourcing circuitry is coupled to said first circuit terminal for providing a first current. A switch network comprises first, second, third and fourth switch network terminals, said first switch network terminal coupled to a reference potential, said second switch network terminal coupled to said second circuit terminal, and said third switch network terminal coupled to said third circuit terminal. Comparator circuitry provides a comparison signal, its first input terminal being coupled to said first circuit terminal.Type: GrantFiled: December 13, 2013Date of Patent: March 28, 2017Assignee: Cirrus Logic, Inc.Inventors: Graeme Mackay, Andrew Bothwell
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Publication number: 20150358719Abstract: Circuitry detects properties of an accessory removably connected thereto via a multi-pole connector. The circuitry has first, second and third circuit terminals for coupling to respective first, second, and third poles of said connector, and has an output for providing evaluation values from which properties of the accessory may be derived. In the circuitry, first current sourcing circuitry is coupled to said first circuit terminal for providing a first current. A switch network comprises first, second, third and fourth switch network terminals, said first switch network terminal coupled to a reference potential, said second switch network terminal coupled to said second circuit terminal, and said third switch network terminal coupled to said third circuit terminal. Comparator circuitry provides a comparison signal, its first input terminal being coupled to said first circuit terminal.Type: ApplicationFiled: December 13, 2013Publication date: December 10, 2015Inventors: Graeme Mackay, Andrew Bothwell
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Patent number: 9022484Abstract: A mining machine for cutting material from a mine wall includes a cutting head that is movable to engage the mine wall, a vacuum duct positioned proximate the cutting head and including an inlet for receiving the material that is cut from the mine wall, and a sizer for reducing the size of material that passes into the vacuum duct, the sizer being positioned proximate the inlet.Type: GrantFiled: August 3, 2012Date of Patent: May 5, 2015Assignee: Joy MM Delaware, Inc.Inventors: Dushendra Naidoo, Graeme Mackay
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Publication number: 20130033089Abstract: A mining machine for cutting material from a mine wall includes a cutting head that is movable to engage the mine wall, a vacuum duct positioned proximate the cutting head and including an inlet for receiving the material that is cut from the mine wall, and a sizer for reducing the size of material that passes into the vacuum duct, the sizer being positioned proximate the inlet.Type: ApplicationFiled: August 3, 2012Publication date: February 7, 2013Inventors: Dushendra Naidoo, Graeme Mackay