Patents by Inventor George C. Rosar
George C. Rosar 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: 11628306Abstract: Techniques for facilitating improved power management for an implantable device are provided. In one example, an implantable device includes a telemetry circuit and a power management circuit. The telemetry circuit is configured to facilitate a telemetry session between the implantable device and an external device. The power management circuit is configured to connect a power supply to the telemetry circuit via a first current-limiting device based on a determination that the telemetry circuit satisfies a defined criterion. The power management circuit is also configured to connect the telemetry circuit to a second current-limiting device based on a determination that the telemetry circuit is connected to the first current-limiting device for a defined period of time.Type: GrantFiled: May 17, 2021Date of Patent: April 18, 2023Assignee: MEDTRONIC, INC.Inventors: James J. St. Martin, George C. Rosar, John D. Wahlstrand
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Publication number: 20210268291Abstract: Techniques for facilitating improved power management for an implantable device are provided. In one example, an implantable device includes a telemetry circuit and a power management circuit. The telemetry circuit is configured to facilitate a telemetry session between the implantable device and an external device. The power management circuit is configured to connect a power supply to the telemetry circuit via a first current-limiting device based on a determination that the telemetry circuit satisfies a defined criterion. The power management circuit is also configured to connect the telemetry circuit to a second current-limiting device based on a determination that the telemetry circuit is connected to the first current-limiting device for a defined period of time.Type: ApplicationFiled: May 17, 2021Publication date: September 2, 2021Inventors: James J. St. Martin, George C. Rosar, John D. Wahlstrand
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Patent number: 11013929Abstract: Techniques for facilitating improved power management for an implantable device are provided. In one example, an implantable device includes a telemetry circuit and a power management circuit. The telemetry circuit is configured to facilitate a telemetry session between the implantable device and an external device. The power management circuit is configured to connect a power supply to the telemetry circuit via a first current-limiting device based on a determination that the telemetry circuit satisfies a defined criterion. The power management circuit is also configured to connect the telemetry circuit to a second current-limiting device based on a determination that the telemetry circuit is connected to the first current-limiting device for a defined period of time.Type: GrantFiled: March 30, 2017Date of Patent: May 25, 2021Assignee: Medtronic, Inc.Inventors: James J. St. Martin, George C. Rosar, John D. Wahlstrand
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Publication number: 20180243567Abstract: Techniques for facilitating improved power management for an implantable device are provided. In one example, an implantable device includes a telemetry circuit and a power management circuit. The telemetry circuit is configured to facilitate a telemetry session between the implantable device and an external device. The power management circuit is configured to connect a power supply to the telemetry circuit via a first current-limiting device based on a determination that the telemetry circuit satisfies a defined criterion. The power management circuit is also configured to connect the telemetry circuit to a second current-limiting device based on a determination that the telemetry circuit is connected to the first current-limiting device for a defined period of time.Type: ApplicationFiled: March 30, 2017Publication date: August 30, 2018Inventors: James J. ST. MARTIN, George C. ROSAR, John D. WAHLSTRAND
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Patent number: 9192770Abstract: An implantable medical device is provided having circuitry to control operation of the implantable medical device and a receiver configured to receive communication signals on an allocated band of a plurality of communication channels separated in frequency by a channel spacing. The receiver includes an oscillator and a signal source configured to apply a quench signal to the oscillator. The quench signal has a frequency corresponding to the channel spacing. The receiver is enabled to receive on all of the plurality of communication channels simultaneously by applying the quench signal.Type: GrantFiled: October 31, 2012Date of Patent: November 24, 2015Assignee: Medtronic, Inc.Inventors: Yu Wang, George C. Rosar, Nicholas C. Wine, Gregory Haubrich
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Patent number: 8954008Abstract: A medical device communication system transmitter may include a resonator coupled to a local oscillator for stabilizing an operating frequency of the local oscillator. A control device of the transmitter receives an open-loop control signal, and the local oscillator and the control device are configured to generate a direct modulated radio frequency transmission signal in response to the open-loop control signal.Type: GrantFiled: January 29, 2013Date of Patent: February 10, 2015Assignee: Medtronic, Inc.Inventors: Yu Wang, George C. Rosar
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Publication number: 20140213202Abstract: A medical device communication system transmitter may include a resonator coupled to a local oscillator for stabilizing an operating frequency of the local oscillator. A control device of the transmitter receives an open-loop control signal, and the local oscillator and the control device are configured to generate a direct modulated radio frequency transmission signal in response to the open-loop control signal.Type: ApplicationFiled: January 29, 2013Publication date: July 31, 2014Applicant: MEDTRONIC, INC.Inventors: Yu Wang, George C. Rosar
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Publication number: 20140121727Abstract: An implantable medical device is provided having circuitry to control operation of the implantable medical device and a receiver configured to receive communication signals on an allocated band of a plurality of communication channels separated in frequency by a channel spacing. The receiver includes an oscillator and a signal source configured to apply a quench signal to the oscillator. The quench signal has a frequency corresponding to the channel spacing. The receiver is enabled to receive on all of the plurality of communication channels simultaneously by applying the quench signal.Type: ApplicationFiled: October 31, 2012Publication date: May 1, 2014Applicant: MEDTRONIC, INC.Inventors: Yu Wang, George C. Rosar, Nicholas C. Wine, Gregory Haubrich
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Patent number: 8280521Abstract: Unscheduled wireless communication with a medical device is achieved by operating a receiver of the medical device in a series of modes. Each mode provides an increasingly selective evaluation of received RF energy. The receiver, when operating in a first mode, is capable of detecting the presence of RF energy transmitted from a communicating device. The receiver, when operating in a second mode, consumes more energy than the first mode and analyzes the RF energy to determine whether it contains the appropriate type of modulation. When operating in a third mode, the receiver consumes more energy than the second mode, and operates the full receiver to begin communication with the communicating device. The receiver opens a communication session after the RF energy has passed the evaluation by the series of modes to receive an unscheduled communication.Type: GrantFiled: October 14, 2011Date of Patent: October 2, 2012Assignee: Medtronic, Inc.Inventors: Gregory J. Haubrich, Len D. Twetan, David Peichel, Charles H. Dudding, George C. Rosar, Quentin S. Denzene
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Patent number: 8185210Abstract: Medical data is communicated from a transmitter of an external unit to a receiver of an implantable medical device. The transmitter generates a preamble signal having encoded configuration data that informs the receiver of configuration settings to be used in receiving the medical data. The receiver detects the preamble and validates a modulation pattern of the preamble. Configuration data is decoded from the preamble signal and the receiver configuration is adjusted to receive the medical data.Type: GrantFiled: September 12, 2005Date of Patent: May 22, 2012Assignee: Medtronic, Inc.Inventors: Gregory J. Haubrich, Javaid Masoud, George C. Rosar, Glenn O. Spital, Quentin S. Denzene
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Publication number: 20120034896Abstract: Unscheduled wireless communication with a medical device is achieved by operating a receiver of the medical device in a series of modes. Each mode provides an increasingly selective evaluation of received RF energy. The receiver, when operating in a first mode, is capable of detecting the presence of RF energy transmitted from a communicating device. The receiver, when operating in a second mode, consumes more energy than the first mode and analyzes the RF energy to determine whether it contains the appropriate type of modulation. When operating in a third mode, the receiver consumes more energy than the second mode, and operates the full receiver to begin communication with the communicating device. The receiver opens a communication session after the RF energy has passed the evaluation by the series of modes to receive an unscheduled communication.Type: ApplicationFiled: October 14, 2011Publication date: February 9, 2012Inventors: Gregory J. HAUBRICH, Len D. TWETAN, David PEICHEL, Charles H. DUDDING, George C. ROSAR, Quentin S. DENZENE
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Patent number: 8102789Abstract: Constituents of a network of medical devices communicate according to a synchronous communication protocol. A constituent of the network is established as a conductor. Time slots are assigned to each constituent of the network other than the conductor. Information is communicated between the constituents of the network in the assigned time slots.Type: GrantFiled: December 29, 2005Date of Patent: January 24, 2012Assignee: Medtronic, Inc.Inventors: George C. Rosar, Gregory J. Haubrich, Javaid Masoud, Charles S. Farlow
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Patent number: 8065018Abstract: Unscheduled wireless communication with a medical device is achieved by operating a receiver of the medical device in a series of modes. Each mode provides an increasingly selective evaluation of received RF energy. The receiver, when operating in a first mode, is capable of detecting the presence of RF energy transmitted from a communicating device. The receiver, when operating in a second mode, consumes more energy than the first mode and analyzes the RF energy to determine whether it contains the appropriate type of modulation. When operating in a third mode, the receiver consumes more energy than the second mode, and operates the full receiver to begin communication with the communicating device. The receiver opens a communication session after the RF energy has passed the evaluation by the series of modes to receive an unscheduled communication.Type: GrantFiled: September 12, 2005Date of Patent: November 22, 2011Assignee: Medtronic, Inc.Inventors: Gregory J. Haubrich, Len D. Twetan, David Peichel, Charles H. Dudding, George C. Rosar, Quentin S. Denzene
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Patent number: 8059628Abstract: A low power multiple channel receiver mixing architecture for detecting wake-up signals over multiple communication channels in sniff processing performed in an implantable medical device (IMD). The architecture includes a direct conversion real receiver configured to scan a selected center channel and a Weaver receiver configured in parallel to the direct conversion real receiver to simultaneously scan side channels, together simultaneously detecting whether a wake-up signal is being received over the center and side channels with minimal power consumption. The architecture further utilizes a falsing protection algorithm that reduces power consumption during sniff operations by inhibiting the sniffing of channels likely to provide a false indication of a wake-up signal based the presence of unwanted signals on those channels.Type: GrantFiled: February 2, 2009Date of Patent: November 15, 2011Assignee: Medtronic, Inc.Inventors: Peter Bradley, Guy A. Delight, Remi Le Reverend, Philip Dorning, Andrew M. Bottomley, Eric D. Corndorf, Charles H. Dudding, Nicholas C. Wine, George C. Rosar, Quentin Scott Denzene, Robert S. Wentink
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Patent number: 7890181Abstract: Data is communicated from a transmitter of an external unit to a receiver of an implantable medical device. The receiver of the implantable medical device operates in a wide band receiver mode to detect the transmission from the external unit and operates in a narrow band receiver mode to receive the data.Type: GrantFiled: September 12, 2005Date of Patent: February 15, 2011Assignee: Medtronic, Inc.Inventors: Quentin S. Denzene, George C. Rosar
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Publication number: 20090252042Abstract: A low power multiple channel receiver mixing architecture for detecting wake-up signals over multiple communication channles in sniff processing performed in an implantable medical device (IMD). The architecture includes a direct conversion real receiver configured to scan a selected center channel and a Weaver receiver configured in parallel to the direct conversion real receiver to simultaneously scan side channels, together simultaneously detecting whether a wake-up signal is being received over the center and side channels with minimal power consumption. The architecture further utilizes a falsing protection algorithm that reduces power consumption during sniff operations by inhibiting the sniffing of channels likely to provide a false indication of a wake-up signal based the presence of unwanted signals on those channels.Type: ApplicationFiled: February 2, 2009Publication date: October 8, 2009Inventors: Peter Bradley, Guy A. Delight, Remi Le Reverend, Philip Dorning, Andrew M. Bottomley, Eric D. Corndorf, Charles H. Dudding, Nicholas C. Wine, George C. Rosar, Quentin Scott Denzene, Robert S. Wentink
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Patent number: 7467014Abstract: An implantable medical device (“IMD”) configured in accordance with an example embodiment of the invention generally includes a housing, a connector header block coupled to the housing, a dielectric sheath located around at least a portion of the housing and/or around at least a portion of the header block, and a telemetry antenna located within the dielectric sheath. The antenna is configured to support far field telemetry with an external device such as a programmer. In one example embodiment, the antenna is configured as a balanced antenna having two separate antenna elements driven 180 degrees out of phase. Each of the antenna elements has a feed point on a perimeter edge of the IMD housing and a floating endpoint. A number of alternate embodiments are also provided.Type: GrantFiled: April 28, 2005Date of Patent: December 16, 2008Assignee: Medtronic, Inc.Inventors: Christopher C. Fuller, William D. Verhoef, Gregory J. Haubrich, Javaid Masoud, George C. Rosar, Garry L. Dublin, Piotr Przybyszewski
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Patent number: 5300068Abstract: An electrosurgical apparatus for cutting tissue and for ablating occlusions includes a pulse generator for selectively generating a train of pulses of electrical energy for application to a wire having an attached electrode, the generator having a variable output impedance, the wire and the electrode being at least part of a load impedance. The apparatus senses the load impedance relative to the output impedance and adjusts the output impedance to match the load impedance. The generator produces pulses of variable energy, measures the relative electrical energy produced by an arc in response to a pulse, compares the relative electrical energy to a predetermined value to determine an energy difference, and adjusts the energy of a subsequent pulse to reduce the energy difference for the subsequent pulse toward zero.Type: GrantFiled: April 21, 1992Date of Patent: April 5, 1994Assignee: St. Jude Medical, Inc.Inventors: George C. Rosar, Ken W. Bachofer, James L. Pokorney, James E. Graf
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Patent number: 4800348Abstract: An adjustable electronic filter apparatus is disclosed comprising a dielectric block having one or more through-holes and having a conformal conductive coating substantially over all outside surfaces as well as each through-hole therein. Each through-hole so plated forms a resonator from a transmission line which includes an open portion, for providing capacitive reactance at a first end, and a short-circuited end as a base, for providing an associated distributed inductance at a second end thereof. A unique method of tuning the adjustable electronic filter, whether a single resonator, a plurality of resonators, or a plurality of intercoupled multi-resonator filters, is disclosed that permits bi-directional tuning for at least one resonator in each of the above exemplary embodiments. By selectively adjusting an inductive portion of the plating at the base of each resonator so tuned, a resonator is quickly and accurately adjusted to a desired frequency.Type: GrantFiled: August 3, 1987Date of Patent: January 24, 1989Assignee: Motorola, Inc.Inventors: George C. Rosar, David G. Clifford, Jr.
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Patent number: 4626806Abstract: A solid state radio frequency switching circuit is provided that exhibits up to 25 db isolation between output ports. The circuit integrates the switching versatility of a pin diode switch with the excellent signal isolation of a quarter wavelength combiner.Type: GrantFiled: October 10, 1985Date of Patent: December 2, 1986Assignee: E. F. Johnson CompanyInventors: George C. Rosar, James R. Wilson