Patents by Inventor Julian Haines
Julian Haines 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: 10763870Abstract: An example clock synthesizer, having a single-phase clock signal as input and generating an output clock, includes a phase decrementer configured to receive a fractional period value, configured to, responsive to the fractional period value, maintain a fractional count, and configured to accumulate residual phase from cycle-to-cycle of the output clock. A clock generator provides an integer-count-zero signal indicative of an integer portion of the fractional count reaching zero. A clock phase selector is configured to provide a signal having a fractional portion of the fractional count. A phase generator and combiner is coupled to an output of the clock generator, and an output of the clock phase selector, and is configured to provide the output clock.Type: GrantFiled: March 23, 2020Date of Patent: September 1, 2020Assignee: XILINX, INC.Inventors: Julian Haines, Rhona Wade
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Patent number: 8243033Abstract: A low-cost x-y digitizing system for use in consumer electronic devices, such as portable digital assistants, mobile telephones, web browsers and the like. The digitizer includes a resonant stylus, an excitation winding for energizing the resonant stylus and a set of sensor windings for sensing the signal generated by the stylus, from which the x-y position of the stylus is determined. A novel stylus design is described together with novel digitizer windings and novel excitation and processing circuitry.Type: GrantFiled: March 3, 2009Date of Patent: August 14, 2012Assignee: Synaptics (UK) LimitedInventors: David T. E. Ely, Geoffrey Foote, Julian Haines, Gareth J. McCaughan
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Patent number: 7948245Abstract: Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.Type: GrantFiled: February 18, 2010Date of Patent: May 24, 2011Assignee: Synaptics IncorporatedInventors: Kirk Hargreaves, Joseph Kurth Reynolds, David Ely, Julian Haines
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Patent number: 7902842Abstract: Methods, systems and devices are described for detecting a measurable capacitance using charge transfer techniques that can be implemented with many standard microcontrollers, and can share components to reduce device complexity and improve performance. In the various implementations of this embodiment, the passive network used to accumulate charge can be shared between multiple measurable capacitances. Likewise, in various implementations a voltage conditioning circuit configured to provide a variable reference voltage can be shared between multiple measurable capacitances. Finally, in various implementations a guarding electrode configured to guard the measurable capacitances can be shared between multiple measurable capacitances. In each of these cases, sharing components can reduce device complexity and improve performance.Type: GrantFiled: October 26, 2007Date of Patent: March 8, 2011Assignee: Synaptics IncorporatedInventors: Joseph Kurth Reynolds, Kirk Hargreaves, David Ely, Paul Routley, Julian Haines
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Patent number: 7750649Abstract: Methods, systems and devices are described for detecting a measurable capacitance using charge transfer techniques. According to various embodiments, a charge transfer process is performed for two or more times. During the charge transfer process, a pre-determined voltage is applied to the measurable capacitance, and the measurable capacitance is then allowed to share charge with a filter capacitance through a passive impedance that remains coupled to both the measurable capacitance and to the filter capacitance throughout the charge transfer process. The value of the measurable capacitance can then be determined as a function of a representation of a charge on the filter capacitance and the number of times that the charge transfer process was performed. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to an input sensor.Type: GrantFiled: March 13, 2009Date of Patent: July 6, 2010Assignee: Synaptics IncorporatedInventors: David Ely, Paul Routley, Joseph Kurth Reynolds, Julian Haines, Kirk Hargreaves
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Publication number: 20100148806Abstract: Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.Type: ApplicationFiled: February 18, 2010Publication date: June 17, 2010Applicant: SYNAPTICS INCORPORATEDInventors: Kirk Hargreaves, Joseph Kurth Reynolds, David Ely, Julian Haines
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Patent number: 7683641Abstract: Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.Type: GrantFiled: October 15, 2008Date of Patent: March 23, 2010Assignee: Synaptics IncorporatedInventors: Kirk Hargreaves, Joseph Kurth Reynolds, David Ely, Julian Haines
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Publication number: 20090184940Abstract: A low-cost x-y digitizing system for use in consumer electronic devices, such as portable digital assistants, mobile telephones, web browsers and the like. The digitizer includes a resonant stylus, an excitation winding for energizing the resonant stylus and a set of sensor windings for sensing the signal generated by the stylus, from which the x-y position of the stylus is determined. A novel stylus design is described together with novel digitizer windings and novel excitation and processing circuitry.Type: ApplicationFiled: March 3, 2009Publication date: July 23, 2009Applicant: Synaptics (UK) LimitedInventors: Christopher J. Silk, David T.E. Ely, Andrew M. Errington, Ian Collins, Geoffrey Foote, Julian Haines, Robert Bolender, Gareth J. McCaughan
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Publication number: 20090174416Abstract: Methods, systems and devices are described for detecting a measurable capacitance using charge transfer techniques. According to various embodiments, a charge transfer process is performed for two or more times. During the charge transfer process, a pre-determined voltage is applied to the measurable capacitance, and the measurable capacitance is then allowed to share charge with a filter capacitance through a passive impedance that remains coupled to both the measurable capacitance and to the filter capacitance throughout the charge transfer process. The value of the measurable capacitance can then be determined as a function of a representation of a charge on the filter capacitance and the number of times that the charge transfer process was performed. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to an input sensor.Type: ApplicationFiled: March 13, 2009Publication date: July 9, 2009Applicant: SYNAPTICS INCORPORATEDInventors: David ELY, Paul ROUTLEY, Joseph Kurth REYNOLDS, Julian HAINES, Kirk HARGREAVES
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Patent number: 7521941Abstract: Methods, systems and devices are described for detecting a measurable capacitance using charge transfer techniques. According to various embodiments, a charge transfer process is performed for two or more times. During the charge transfer process, a pre-determined voltage is applied to the measurable capacitance, and the measurable capacitance is then allowed to share charge with a filter capacitance through a passive impedance that remains coupled to both the measurable capacitance and to the filter capacitance throughout the charge transfer process. The value of the measurable capacitance can then be determined as a function of a representation of a charge on the filter capacitance and the number of times that the charge transfer process was performed. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to an input sensor.Type: GrantFiled: October 26, 2007Date of Patent: April 21, 2009Assignee: Synaptics, Inc.Inventors: David Ely, Paul Routley, Joseph Kurth Reynolds, Julian Haines, Kirk Hargreaves
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Patent number: 7511705Abstract: A low cost x-y digitizing system is described for use in consumer electronic devices, such as portable digital assistants, mobile telephones, web browsers and the like. The digitizer includes a resonant stylus, an excitation winding for energizing the resonant stylus and a set of sensor windings for sensing the signal generated by the stylus, from which the x-y position of the stylus is determined. A novel stylus design is described together with novel digitizer windings and novel excitation and processing circuitry.Type: GrantFiled: May 21, 2002Date of Patent: March 31, 2009Assignee: Synaptics (UK) LimitedInventors: Christopher J. Silk, David T. E. Ely, Andrew Errington, Ian Collins, Geoffrey Foote, Julian Haines, Robert J. Bolender, Gareth J. McCaughan
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Publication number: 20090039902Abstract: Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.Type: ApplicationFiled: October 15, 2008Publication date: February 12, 2009Applicant: SYNAPTICS INCORPORATEDInventors: Kirk HARGREAVES, Joseph Kurth REYNOLDS, David ELY, Julian HAINES
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Patent number: 7453270Abstract: Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.Type: GrantFiled: October 30, 2007Date of Patent: November 18, 2008Assignee: Synaptics IncorporatedInventors: Kirk Hargreaves, Joseph Kurth Reynolds, David Ely, Julian Haines
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Patent number: 7449895Abstract: Methods, systems and devices are described for detecting a measurable capacitance using charge transfer techniques. According to various embodiments, a charge transfer process is performed for two or more times. During the charge transfer process, a pre-determined voltage is applied to the measurable capacitance, and the measurable capacitance is then allowed to share charge with a filter capacitance through a passive impedance that remains coupled to both the measurable capacitance and to the filter capacitance throughout the charge transfer process. The value of the measurable capacitance can then be determined as a function of a representation of a charge on the filter capacitance and the number of times that the charge transfer process was performed. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to an input sensor.Type: GrantFiled: June 3, 2006Date of Patent: November 11, 2008Assignee: Synaptics IncorporatedInventors: David Ely, Paul Routley, Joseph Kurth Reynolds, Julian Haines, Kirk Hargreaves
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Patent number: 7423437Abstract: Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.Type: GrantFiled: October 30, 2007Date of Patent: September 9, 2008Assignee: Synaptics IncorporatedInventors: Kirk Hargreaves, Joseph Kurth Reynolds, David Ely, Julian Haines
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Publication number: 20080116904Abstract: Methods, systems and devices are described for detecting a measurable capacitance using charge transfer techniques that can be implemented with many standard microcontrollers, and can share components to reduce device complexity and improve performance. In the various implementations of this embodiment, the passive network used to accumulate charge can be shared between multiple measurable capacitances. Likewise, in various implementations a voltage conditioning circuit configured to provide a variable reference voltage can be shared between multiple measurable capacitances. Finally, in various implementations a guarding electrode configured to guard the measurable capacitances can be shared between multiple measurable capacitances. In each of these cases, sharing components can reduce device complexity and improve performance.Type: ApplicationFiled: October 26, 2007Publication date: May 22, 2008Applicant: SYNAPTICS INCORPORATEDInventors: Joseph Kurth Reynolds, Kirk Hargreaves, David Ely, Paul Routley, Julian Haines
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Publication number: 20080048679Abstract: Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.Type: ApplicationFiled: October 30, 2007Publication date: February 28, 2008Applicant: SYNAPTICS INCORPORATEDInventors: Kirk HARGREAVES, Joseph REYNOLDS, David ELY, Julian HAINES
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Publication number: 20080048680Abstract: Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.Type: ApplicationFiled: October 30, 2007Publication date: February 28, 2008Applicant: SYNAPTICS INCORPORATEDInventors: Kirk HARGREAVES, Joseph REYNOLDS, David ELY, Julian HAINES
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Publication number: 20080042660Abstract: Methods, systems and devices are described for detecting a measurable capacitance using charge transfer techniques. According to various embodiments, a charge transfer process is performed for two or more times. During the charge transfer process, a pre-determined voltage is applied to the measurable capacitance, and the measurable capacitance is then allowed to share charge with a filter capacitance through a passive impedance that remains coupled to both the measurable capacitance and to the filter capacitance throughout the charge transfer process. The value of the measurable capacitance can then be determined as a function of a representation of a charge on the filter capacitance and the number of times that the charge transfer process was performed. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to an input sensor.Type: ApplicationFiled: October 26, 2007Publication date: February 21, 2008Applicant: SYNAPTICS INCORPORATEDInventors: David ELY, Paul ROUTLEY, Joseph REYNOLDS, Julian HAINES, Kirk HARGREAVES
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Patent number: 7301350Abstract: Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.Type: GrantFiled: June 3, 2006Date of Patent: November 27, 2007Assignee: Synaptics IncorporatedInventors: Kirk Hargreaves, Joseph Kurth Reynolds, David Ely, Julian Haines