Patents by Inventor Gopikrishnan Soundararajan
Gopikrishnan Soundararajan 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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Publication number: 20140034493Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: ApplicationFiled: October 9, 2013Publication date: February 6, 2014Applicant: MEDTRONIC MINIMED, INC.Inventors: RAJIV SHAH, WAYNE A. MORGAN, DAVID Y. CHOY, JAMES L. HENKE, BAHAR REGHABI, GOPIKRISHNAN SOUNDARARAJAN, PETER SCHULTZ, UDO HOSS
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Publication number: 20140038124Abstract: A light device includes a body and a tip structure configured to be removably coupled with the housing. The tip includes a light engine that is operable for emitting light positioned at a distal end of the tip. A power supply circuit is positioned in the housing and coupled to the light engine. The power supply circuit is rechargeable and includes at least one ultracapacitor element. A non-imaging element is coupled with the light engine at the distal end.Type: ApplicationFiled: June 21, 2013Publication date: February 6, 2014Inventors: Owen Gill, Ruth Barry, Stacy Lee Wyatt, Gopikrishnan Soundararajan
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Publication number: 20130334040Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: ApplicationFiled: August 12, 2013Publication date: December 19, 2013Applicant: MEDTRONIC MINIMED, INC.Inventors: Rajiv Shah, Wayne A. Morgan, David Y. Choy, James L. Henke, Bahar Reghabi, Gopikrishnan Soundararajan, Peter Schultz, Udo Hoss
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Patent number: 8608924Abstract: According to an embodiment of the invention, a method of determining hydration of a sensor having a plurality of electrodes is disclosed. In particular embodiments, the method couples a sensor electronics device to the sensor and measures the open circuit potential between at least two of the plurality of electrodes. Then, the open circuit potential measurement is compared to a predetermined value. In some embodiments, the plurality of electrodes includes a working electrode, a reference electrode, and a counter electrode. In still further embodiments, the open circuit potential between the working electrode and the reference electrode is measured. In other embodiments, the open circuit potential between the working electrode and the counter electrode is measured. In still other embodiments, the open circuit potential between the counter electrode and the reference electrode is measured.Type: GrantFiled: December 16, 2011Date of Patent: December 17, 2013Assignee: Medtronic Minimed, Inc.Inventors: Kenneth W. Cooper, David Y. Choy, Rajiv Shah, Gopikrishnan Soundararajan, Ratnakar Vejella
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Patent number: 8602992Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: GrantFiled: September 21, 2010Date of Patent: December 10, 2013Assignee: Medtronic Minimed, Inc.Inventors: Rajiv Shah, Wayne A. Morgan, David Y. Choy, James L. Henke, Bahar Reghabi, Gopikrishnan Soundararajan, Peter Schultz, Udo Hoss
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Patent number: 8591416Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: GrantFiled: September 21, 2010Date of Patent: November 26, 2013Assignee: Medtronic Minimed, Inc.Inventors: Rajiv Shah, Wayne A. Morgan, David Y. Choy, James L. Henke, Bahar Reghabi, Gopikrishnan Soundararajan, Peter Schultz, Udo Hoss
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Publication number: 20130311103Abstract: According to an embodiment of the invention, a method of determining hydration of a sensor having a plurality of electrodes is disclosed. In particular embodiments, the method couples a sensor electronics device to the sensor and measures the open circuit potential between at least two of the plurality of electrodes. Then, the open circuit potential measurement is compared to a predetermined value. In some embodiments, the plurality of electrodes includes a working electrode, a reference electrode, and a counter electrode. In still further embodiments, the open circuit potential between the working electrode and the reference electrode is measured. In other embodiments, the open circuit potential between the working electrode and the counter electrode is measured. In still other embodiments, the open circuit potential between the counter electrode and the reference electrode is measured.Type: ApplicationFiled: July 25, 2013Publication date: November 21, 2013Applicant: MEDTRONIC MINIMED, INC.Inventors: Kenneth W. Cooper, David Y. Choy, Rajiv Shah, Gopikrishnan Soundararajan, Ratnakar Vejella
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Patent number: 8532732Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: GrantFiled: September 21, 2010Date of Patent: September 10, 2013Assignee: Medtronic Minimed, Inc.Inventors: Rajiv Shah, Wayne A. Morgan, David Y. Choy, James L. Henke, Bahar Reghabi, Gopikrishnan Soundararajan, Peter Schultz, Udo Hoss
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Patent number: 8414489Abstract: The disclosure provides methods for fabricating a long-term analyte sensor for measuring at least one analyte in the body of a user. The analyte sensors made by these methods include a plurality of analyte contacting sensor elements and at least one structure for relaying information to and from the sensor. The analyte sensor so fabricated further includes at least one sensor protection membrane that is controllable in a manner such that sensor elements may be activated (e.g. exposed to the external environment) at different times so as to extend the useful life of the sensor. In illustrative analyte sensors, the analyte is glucose.Type: GrantFiled: January 12, 2005Date of Patent: April 9, 2013Assignee: Medtronic MiniMed, Inc.Inventors: Rajiv Shah, Shaun M. Pendo, Rebecca K. Gottlieb, Gil Bruso, Gopikrishnan Soundararajan, Katherine T. Wolfe
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Publication number: 20120215121Abstract: A micromachined sensor for measuring vascular parameters, such as fluid shear stress, includes a substrate having a front-side surface, and a backside surface opposite the front-side surface. The sensor includes a diaphragm overlying a cavity etched within the substrate, and a heat sensing element disposed on the front-side surface of the substrate and on top of the cavity and the diaphragm. The heat sensing element is electrically couplable to electrode leads formed on the backside surface of the substrate. The sensor includes an electronic system connected to the backside surface and configured to measure a change in heat convection from the sensing element to surrounding fluid when the sensing element is heated by applying an electric current thereto, and further configured to derive from the change in heat convection vascular parameters such as the shear stress of fluid flowing past the sensing element.Type: ApplicationFiled: May 1, 2012Publication date: August 23, 2012Applicant: UNIVERSITY OF SOUTHERN CALIFORNIAInventors: Tzung K. Hsiai, Gopikrishnan Soundararajan, Eun Sok Kim, Hongyu Yu, Mahsa Rouhanizadeh, Christina Tiantian Lin
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Patent number: 8216434Abstract: A micromachined sensor for measuring vascular parameters, such as fluid shear stress, includes a substrate having a front-side surface, and a backside surface opposite the front-side surface. The sensor includes a diaphragm overlying a cavity etched within the substrate, and a heat sensing element disposed on the front-side surface of the substrate and on top of the cavity and the diaphragm. The heat sensing element is electrically couplable to electrode leads formed on the backside surface of the substrate. The sensor includes an electronic system connected to the backside surface and configured to measure a change in heat convection from the sensing element to surrounding fluid when the sensing element is heated by applying an electric current thereto, and further configured to derive from the change in heat convection vascular parameters such as the shear stress of fluid flowing past the sensing element.Type: GrantFiled: March 3, 2008Date of Patent: July 10, 2012Assignee: University of Southern CaliforniaInventors: Tzung K. Hsiai, Gopikrishnan Soundararajan, Eun Sok Kim, Hongyu Yu, Mahsa Rouhanizadeh, Christina Tiantian Lin
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Publication number: 20120088996Abstract: According to an embodiment of the invention, a method of determining hydration of a sensor having a plurality of electrodes is disclosed. In particular embodiments, the method couples a sensor electronics device to the sensor and measures the open circuit potential between at least two of the plurality of electrodes. Then, the open circuit potential measurement is compared to a predetermined value. In some embodiments, the plurality of electrodes includes a working electrode, a reference electrode, and a counter electrode. In still further embodiments, the open circuit potential between the working electrode and the reference electrode is measured. In other embodiments, the open circuit potential between the working electrode and the counter electrode is measured. In still other embodiments, the open circuit potential between the counter electrode and the reference electrode is measured.Type: ApplicationFiled: December 16, 2011Publication date: April 12, 2012Applicant: MEDTRONIC MINIMED, INC.Inventors: KENNETH W. COOPER, David Y. Choy, Rajiv Shah, Gopikrishnan Soundararajan, Ratnakar Vejella
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Patent number: 8114269Abstract: According to an embodiment of the invention, a method of determining hydration of a sensor having a plurality of electrodes is disclosed. In particular embodiments, the method couples a sensor electronics device to the sensor and measures the open circuit potential between at least two of the plurality of electrodes. Then, the open circuit potential measurement is compared to a predetermined value. In some embodiments, the plurality of electrodes includes a working electrode, a reference electrode, and a counter electrode. In still further embodiments, the open circuit potential between the working electrode and the reference electrode is measured. In other embodiments, the open circuit potential between the working electrode and the counter electrode is measured. In still other embodiments, the open circuit potential between the counter electrode and the reference electrode is measured.Type: GrantFiled: December 28, 2007Date of Patent: February 14, 2012Assignee: Medtronic Minimed, Inc.Inventors: Kenneth W. Cooper, David Y. Choy, Rajiv Shah, Gopikrishnan Soundararajan, Ratnakar Vejella
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Publication number: 20110130988Abstract: A blood glucose sensing system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes stabilization circuitry. The stabilization circuitry causes a first voltage to be applied to one of the electrodes for a first timeframe and causes a second voltage to be applied to one of the electrodes for a second timeframe. The stabilization circuitry repeats the application of the first voltage and the second voltage to continue the anodic-cathodic cycle. The sensor electronics device may include a power supply, a regulator, and a voltage application device, where the voltage application device receives a regulated voltage from the regulator, applies a first voltage to an electrode for the first timeframe, and applies a second voltage to an electrode for the second timeframe.Type: ApplicationFiled: January 11, 2011Publication date: June 2, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: RAJIV SHAH, Bahar Reghabi, James L. Henke, Wayne A. Morgan, Gopikrishnan Soundararajan, David Y. Choy, Peter Schultz, Udo Hoss
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Publication number: 20110125446Abstract: A blood glucose sensing system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes stabilization circuitry. The stabilization circuitry causes a first voltage to be applied to one of the electrodes for a first timeframe and causes a second voltage to be applied to one of the electrodes for a second timeframe. The stabilization circuitry repeats the application of the first voltage and the second voltage to continue the anodic—cathodic cycle. The sensor electronics device may include a power supply, a regulator, and a voltage application device, where the voltage application device receives a regulated voltage from the regulator, applies a first voltage to an electrode for the first timeframe, and applies a second voltage to an electrode for the second timeframe.Type: ApplicationFiled: January 11, 2011Publication date: May 26, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: RAJIV SHAH, Bahar Reghabi, James L. Henke, Wayne A. Morgan, Gopikrishnan Soundararajan, David Y. Choy, Peter Schultz, Udo Hoss
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Publication number: 20110125447Abstract: A blood glucose sensing system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes stabilization circuitry. The stabilization circuitry causes a first voltage to be applied to one of the electrodes for a first timeframe and causes a second voltage to be applied to one of the electrodes for a second timeframe. The stabilization circuitry repeats the application of the first voltage and the second voltage to continue the anodic-cathodic cycle. The sensor electronics device may include a power supply, a regulator, and a voltage application device, where the voltage application device receives a regulated voltage from the regulator, applies a first voltage to an electrode for the first timeframe, and applies a second voltage to an electrode for the second timeframe.Type: ApplicationFiled: January 11, 2011Publication date: May 26, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: Rajiv Shah, Bahar Reghabi, James L. Henke, Wayne A. Morgan, Gopikrishnan Soundararajan, David Y. Choy, Peter Schultz, Udo Hoss
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Publication number: 20110106480Abstract: A blood glucose sensing system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes stabilization circuitry. The stabilization circuitry causes a first voltage to be applied to one of the electrodes for a first timeframe and causes a second voltage to be applied to one of the electrodes for a second timeframe. The stabilization circuitry repeats the application of the first voltage and the second voltage to continue the anodic-cathodic cycle. The sensor electronics device may include a power supply, a regulator, and a voltage application device, where the voltage application device receives a regulated voltage from the regulator, applies a first voltage to an electrode for the first timeframe, and applies a second voltage to an electrode for the second timeframe.Type: ApplicationFiled: January 11, 2011Publication date: May 5, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: RAJIV SHAH, Bahar Reghabi, James L. Henke, Wayne A. Morgan, Gopikrishnan Soundararajan, David Y. Choy, Peter Schultz, Udo Hoss
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Publication number: 20110101995Abstract: A blood glucose sensing system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes stabilization circuitry. The stabilization circuitry causes a first voltage to be applied to one of the electrodes for a first timeframe and causes a second voltage to be applied to one of the electrodes for a second timeframe. The stabilization circuitry repeats the application of the first voltage and the second voltage to continue the anodic-cathodic cycle. The sensor electronics device may include a power supply, a regulator, and a voltage application device, where the voltage application device receives a regulated voltage from the regulator, applies a first voltage to an electrode for the first timeframe, and applies a second voltage to an electrode for the second timeframe.Type: ApplicationFiled: January 11, 2011Publication date: May 5, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: RAJIV SHAH, Bahar Reghabi, James L. Henke, Wayne A. Morgan, Gopikrishnan Soundararajan, David Y. Choy, Peter Schultz, Udo Hoss
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Publication number: 20110054281Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: ApplicationFiled: September 21, 2010Publication date: March 3, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: RAJIV SHAH, WAYNE A. MORGAN, DAVID Y. CHOY, JAMES L. HENKE, BAHAR REGHABI, GOPIKRISHNAN SOUNDARARAJAN, PETER SCHULTZ, UDO HOSS
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Publication number: 20110048941Abstract: A sensor system includes a sensor and a sensor electronics device. The sensor includes a plurality of electrodes. The sensor electronics device includes a connection detection device, a power source, and a delay circuit. The connection detection device determines if the sensor electronics device is connected to the sensor and transmits a connection signal. The delay circuit receives the connection signal, waits a preset hydration time, and couples the regulated voltage from the power source to an electrode in the sensor after the preset hydration time has elapsed. Alternatively, the sensor electronics device may include an electrical detection circuit and a microcontroller. The electrical detection circuit determines if the plurality of electrodes are hydrated and generates an interrupt if the electrodes are hydrated. A microcontroller receives the interrupt and transmits a signal representative of a voltage to an electrode of the plurality of electrodes.Type: ApplicationFiled: September 21, 2010Publication date: March 3, 2011Applicant: MEDTRONIC MINIMED, INC.Inventors: RAJIV SHAH, WAYNE A. MORGAN, DAVID Y. CHOY, JAMES L. HENKE, BAHAR REGHABI, GOPIKRISHNAN SOUNDARARAJAN, PETER SCHULTZ, UDO HOSS