Patents by Inventor David J. Royle
David J. Royle 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: 10142043Abstract: A time differential digital circuit can detect a time difference between first and second event signals. The time difference measurement can be calibrated to account for transmission path delays. The time differential digital circuit can be implemented using field programmable gate array transceivers.Type: GrantFiled: October 11, 2016Date of Patent: November 27, 2018Assignee: VIAVI SOLUTIONS INC.Inventor: David J. Royle
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Publication number: 20180102863Abstract: A time differential digital circuit can detect a time difference between first and second event signals. The time difference measurement can be calibrated to account for transmission path delays. The time differential digital circuit can be implemented using field programmable gate array transceivers.Type: ApplicationFiled: October 11, 2016Publication date: April 12, 2018Applicant: VIAVI SOLUTIONS INC.Inventor: David J. ROYLE
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Patent number: 8310383Abstract: A serializer device is used for generation, from a parallel digital signal, of a clock signal or a serial binary data signal having a pre-determined amount of jitter. A binary number having consecutive groups of ones and zeroes, when serialized by the serializer device, produces a clock signal. By varying the number of ones and zeroes on the binary number, a pre-determined amount of jitter can be generated. Use of sigma-delta modulation in combination with a phase-locked loop circuitry allows one to obtain a smoothly varying jitter of the output signal.Type: GrantFiled: December 23, 2010Date of Patent: November 13, 2012Assignee: JDS Uniphase CorporationInventors: David J. Royle, Mikhail Charny
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Publication number: 20110156933Abstract: A serializer device is used for generation, from a parallel digital signal, of a clock signal or a serial binary data signal having a pre-determined amount of jitter. A binary number having consecutive groups of ones and zeroes, when serialized by the serializer device, produces a clock signal. By varying the number of ones and zeroes on the binary number, a pre-determined amount of jitter can be generated. Use of sigma-delta modulation in combination with a phase-locked loop circuitry allows one to obtain a smoothly varying jitter of the output signal.Type: ApplicationFiled: December 23, 2010Publication date: June 30, 2011Applicant: JDS Uniphase CorporationInventors: David J. Royle, Mikhail Charny
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Patent number: 7769297Abstract: The invention relates to a transceiver optical system in which a single serializer/deserializer (SERDES) chip is used to drive a plurality of transceiver modules.Type: GrantFiled: August 29, 2007Date of Patent: August 3, 2010Assignee: Acterna LLCInventors: David J. Royle, Walter Hargis, Mikhail Charny
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Patent number: 7477521Abstract: Printed circuit boards (PCB's) with edge connectors undergo bending stresses whenever the edge connectors are plugged into mating connectors. The bending stresses causes deformation of the printed circuit board, which can have deleterious effects on electrical components thereon. Slots are provided on the PCB to enable the portion of the PCB surrounding the edge connector to bend relative to the remainder of the PCB, thereby confine the bending to a localized area between the ends of the slots, and isolate the electrical components from any stresses caused thereby.Type: GrantFiled: April 16, 2008Date of Patent: January 13, 2009Assignee: Acterna LLCInventors: Mikhail Charny, David J. Royle
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Publication number: 20080285242Abstract: Printed circuit boards (PCB's) with edge connectors undergo bending stresses whenever the edge connectors are plugged into mating connectors. The bending stresses causes deformation of the printed circuit board, which can have deleterious effects on electrical components thereon. Slots are provided on the PCB to enable the portion of the PCB surrounding the edge connector to bend relative to the remainder of the PCB, thereby confine the bending to a localized area between the ends of the slots, and isolate the electrical components from any stresses caused thereby.Type: ApplicationFiled: April 16, 2008Publication date: November 20, 2008Applicant: ACTERNA LLCInventors: Mikhail Charny, David J. Royle
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Publication number: 20080063395Abstract: The invention relates to a transceiver optical system in which a single serializer/deserializer (SERDES) chip is used to drive a plurality of transceiver modules.Type: ApplicationFiled: August 29, 2007Publication date: March 13, 2008Applicant: ACTERNA LLCInventors: David J. Royle, Walter Hargis, Mikhail Charny
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Publication number: 20040208293Abstract: A modular test instrument comprises a base unit and one of a selection of application modules, neither being capable of performing end-user functions without the other. When physically assembled to one another, the base unit and application module comprise a structurally unitary device specialized for performance of application-specific end-user functions.Type: ApplicationFiled: May 12, 2004Publication date: October 21, 2004Applicant: Acterna LLCInventors: Ali M. Mohammadian, David J. Royle
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Patent number: 6738454Abstract: A method for testing various types of devices or systems employs a modular test instrument comprising a base unit and one of a selection of application modules, neither being capable of performing end-user functions without the other. When physically assembled to one another, the base unit and application module comprise a structurally unitary device specialized for performance of application-specific end-user functions. The base unit is generic to all types of test to be provided, and comprises a display, a power supply, a user interface, and generic software to operate the display and user interface. Each application module is connected to the base unit in the same manner, so that the same base unit can be employed with a wide variety of application modules. The application modules can be readily and conveniently removed from and assembled to the base unit.Type: GrantFiled: February 24, 2003Date of Patent: May 18, 2004Assignee: Acterna LLCInventors: Ali M. Mohammadian, David J. Royle
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Publication number: 20030174813Abstract: A modular test instrument comprises a base unit and one of a selection of application modules, neither being capable of performing end-user functions without the other. When physically assembled to one another, the base unit and application module comprise a structurally unitary device specialized for performance of application-specific end-user functions.Type: ApplicationFiled: February 24, 2003Publication date: September 18, 2003Applicant: Telecommunications Techniques CorporationInventors: Ali M. Mohammadian, David J. Royle
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Patent number: 6590963Abstract: A modular test instrument comprises a base unit and one of a selection of application modules, neither being capable of performing end-user functions without the other. When physically assembled to one another, the base unit and application module comprise a structurally unitary device specialized for performance of application-specific end-user functions. The base unit is generic to all types of test to be provided, and comprises a display, a power supply, a user interface, and generic software to operate the display and user interface. Each application module is connected to the base unit in the same manner, so that the same base unit can he employed with a wide variety of application modules. The application modules can be readily and conveniently removed from and assembled to the base unit.Type: GrantFiled: November 30, 2001Date of Patent: July 8, 2003Assignee: ActernaInventors: Ali M. Mohammadian, David J. Royle
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Publication number: 20020064255Abstract: A modular test instrument comprises a base unit and one of a selection of application modules, neither being capable of performing end-user functions without the other. When physically assembled to one another, the base unit and application module comprise a structurally unitary device specialized for performance of application-specific end-user functions.Type: ApplicationFiled: November 30, 2001Publication date: May 30, 2002Applicant: Telecommunications Techniques CorporationInventors: Ali M. Mohammadian, David J. Royle
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Patent number: 6385300Abstract: A modular test instrument comprises a base unit and one of a selection of application modules, neither being capable of performing end-user functions without the other. When physically assembled to one another, the base unit and application module comprise a structurally unitary device specialized for performance of application-specific end-user functions. The base unit is generic to all types of test to be provided, and comprises a display, a power supply, a user interface, and generic software to operate the display and user interface. Each application module is connected to the base unit in the same manner, so that the same base unit can be employed with a wide variety of application modules. The application modules can be readily and conveniently removed from and assembled to the base unit.Type: GrantFiled: May 5, 2000Date of Patent: May 7, 2002Assignee: Acterna LLCInventors: Ali M. Mohammadian, David J. Royle
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Patent number: 6064721Abstract: A modular test instrument comprises a base unit and one of a selection of application modules, neither being capable of performing end-user functions without the other. When physically assembled to one another, the base unit and application module comprise a structurally unitary device specialized for performance of application-specific end-user functions.The base unit is generic to all types of test to be provided, and comprises a display, a power supply, a user interface, and generic software to operate the display and user interface. Each application module is connected to the base unit in the same manner, so that the same base unit can be employed with a wide variety of application modules. The application modules can be readily and conveniently removed from and assembled to the base unit.Type: GrantFiled: October 22, 1997Date of Patent: May 16, 2000Assignee: Telecommunications Techniques CorporationInventors: Ali M. Mohammadian, David J. Royle