Patents by Inventor Kiran Nimmagadda
Kiran Nimmagadda 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: 8369963Abstract: Disclosed herein are circuits and methods for a multi-electrode implantable stimulator device incorporating one decoupling capacitor in the current path established via at least one cathode electrode and at least one anode electrode. In one embodiment, the decoupling capacitor may be hard-wired to a dedicated anode on the device. The cathodes are selectively activatable via stimulation switches. In another embodiment, any of the electrodes on the devices can be selectively activatable as an anode or cathode. In this embodiment, the decoupling capacitor is placed into the current path via selectable anode and cathode stimulation switches. Regardless of the implementation, the techniques allow for the benefits of capacitive decoupling without the need to associate decoupling capacitors with every electrode on the multi-electrode device, which saves space in the body of the device.Type: GrantFiled: January 24, 2011Date of Patent: February 5, 2013Assignee: Boston Scientific Neuromodulation CorporationInventors: Jordi Parramon, Kiran Nimmagadda, Emanuel Feldman, Yuping He
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Patent number: 8081925Abstract: An improved transceiver circuit particularly useful in an inductively coupled wireless communication system such as an implantable medical device system is disclosed. The improved transceiver circuit is switchable to assume a serial L-C configuration in the transmit mode and a parallel L-C configuration in the receive mode, but does not require high voltage switches. A low-drive transmitter and a high-input-impedance receiver are used, which reduces power consumption in receive mode, while still maintaining good transmitter performance.Type: GrantFiled: May 8, 2008Date of Patent: December 20, 2011Assignee: Boston Scientific Neuromodulation CorporationInventors: Jordi Parramon, Kiran Nimmagadda, Md Mizanur Rahman
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Publication number: 20110118797Abstract: Disclosed herein are circuits and methods for a multi-electrode implantable stimulator device incorporating one decoupling capacitor in the current path established via at least one cathode electrode and at least one anode electrode. In one embodiment, the decoupling capacitor may be hard-wired to a dedicated anode on the device. The cathodes are selectively activatable via stimulation switches. In another embodiment, any of the electrodes on the devices can be selectively activatable as an anode or cathode. In this embodiment, the decoupling capacitor is placed into the current path via selectable anode and cathode stimulation switches. Regardless of the implementation, the techniques allow for the benefits of capacitive decoupling without the need to associate decoupling capacitors with every electrode on the multi-electrode device, which saves space in the body of the device.Type: ApplicationFiled: January 24, 2011Publication date: May 19, 2011Applicant: Boston Scientific Neuromodulation CorporationInventors: Jordi Parramon, Kiran Nimmagadda, Emanuel Feldman, Yuping He
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Publication number: 20110112610Abstract: An improved implantable pulse generator (IPG) containing improved telemetry circuitry is disclosed. The IPG includes charging and telemetry coils within the IPG case, which increases their mutual inductance and potential to interfere with each other; particularly problematic is interference to the telemetry coil caused by the charging coil. To combat this, improved telemetry circuitry includes decoupling circuitry for decoupling the charging coil during periods of telemetry between the IPG and an external controller. Such decoupling circuitry can comprise use of pre-existing LSK circuitry during telemetry, or new discrete circuitry dedicated to decoupling. The decoupling circuitry is designed to prevent or at least reduce induced current flowing through the charging coil during data telemetry.Type: ApplicationFiled: November 11, 2009Publication date: May 12, 2011Applicant: Boston Scientific Neuromodulation CorporationInventors: Md. Mizanur Rahman, Kiran Nimmagadda, Jordi Parramon, Emanuel Feldman
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Patent number: 7881803Abstract: Disclosed herein are circuits and methods for a multi-electrode implantable stimulator device incorporating one decoupling capacitor in the current path established via at least one cathode electrode and at least one anode electrode. In one embodiment, the decoupling capacitor may be hard-wired to a dedicated anode on the device. The cathodes are selectively activatable via stimulation switches. In another embodiment, any of the electrodes on the devices can be selectively activatable as an anode or cathode. In this embodiment, the decoupling capacitor is placed into the current path via selectable anode and cathode stimulation switches. Regardless of the implementation, the techniques allow for the benefits of capacitive decoupling without the need to associate decoupling capacitors with every electrode on the multi-electrode device, which saves space in the body of the device.Type: GrantFiled: October 18, 2006Date of Patent: February 1, 2011Assignee: Boston Scientific Neuromodulation CorporationInventors: Jordi Parramon, Kiran Nimmagadda, Emanuel Feldman, Yuping He
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Publication number: 20110015705Abstract: An improved architecture for an implantable medical device such as an implantable pulse generator (IPG) is disclosed. In one embodiment, the various functional blocks for the IPG are incorporated into a signal integrated circuit (IC). Each of the functional blocks communicate with each other, and with other off-chip devices if necessary, via a centralized bus governed by a communication protocol. To communicate with the bus and to adhere to the protocol, each circuit block includes bus interface circuitry adherent with that protocol. Because each block complies with the protocol, any given block can easily be modified or upgraded without affecting the design of the other blocks, facilitating debugging and upgrading of the IPG circuitry. Moreover, because the centralized bus can be taken off the integrated circuit, extra circuitry can easily be added off chip to modify or add functionality to the IPG without the need for a major redesign of the main IPG IC.Type: ApplicationFiled: September 16, 2010Publication date: January 20, 2011Applicant: BOSTON SCIENTIFIC NEUROMODULATION CORPORATIONInventors: Paul J. Griffith, Jordi Parramon, Goran N. Marnfeldt, Daniel Aghassisn, Kiran Nimmagadda, Emanuel Feldman, Jess W. Shi
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Publication number: 20100211132Abstract: Improved compliance voltage generation circuitry for a medical device is disclosed. The improved circuitry in one embodiment comprises a boost converter and a charge pump, either of which is capable of generating an appropriate compliance voltage from the voltage of the battery in the device. A telemetry enable signal indicating whether the implant's transmitter, receiver, or both, have been enabled is received. A “boost” signal from compliance voltage monitor-and-adjust logic circuitry is processed with the telemetry enable signal and its inverse to selectively enable either the charge pump or the boost converter: if the telemetry enable signal is not active, the boost converter is used to generate the compliance voltage; if the telemetry enable signal is active, the charge pump is used. Because the charge pump circuitry does not produce a magnetic field, the charge pump will not interfere with magnetically-coupled telemetry between the implant and an external controller.Type: ApplicationFiled: February 17, 2009Publication date: August 19, 2010Applicant: Boston Scientific Neuromodulation CorporationInventors: Kiran Nimmagadda, Md. Mizanur Rahman, Jordi Parramon
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Publication number: 20090281597Abstract: An improved transceiver circuit particularly useful in an inductively coupled wireless communication system such as an implantable medical device system is disclosed. The improved transceiver circuit is switchable to assume a serial L-C configuration in the transmit mode and a parallel L-C configuration in the receive mode, but does not require high voltage switches. A low-drive transmitter and a high-input-impedance receiver are used, which reduces power consumption in receive mode, while still maintaining good transmitter performance.Type: ApplicationFiled: May 8, 2008Publication date: November 12, 2009Applicant: BOSTON SCIENTIFIC NEUROMODULATION CORPORATIONInventors: JORDI PARRAMON, KIRAN NIMMAGADDA, MIZANUR RAHMAN
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Publication number: 20090204174Abstract: In one embodiment, the present invention provides an implantable stimulation device that includes output current sources and/or sinks configured to provide an output current for a load (i.e., tissue). The output path of the output current source or sink comprises a transistor which operates in a linear mode instead of a saturation mode. Because operation in a linear mode results in smaller drain-to-source voltage drops, power consumption in the output current source or sink (and hence in the implantable stimulator) is reduced, reducing battery or other power source requirements. Operation in the linear mode is facilitated in useful embodiments by a load in an input path (into which a reference current is sent) and a load in the output path (which bears the output current). The loads can be active transistors or passive resistors. A feedback circuit (e.g.Type: ApplicationFiled: April 16, 2009Publication date: August 13, 2009Applicant: Boston Scientific Neuromodulation CorporationInventors: Jordi Parramon, Yuping He, Kiran Nimmagadda
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Patent number: 7539538Abstract: In one embodiment, the present invention provides an implantable stimulation device that includes output current sources and/or sinks configured to provide an output current for a load (i.e., tissue). The output path of the output current source or sink comprises a transistor which operates in a linear mode instead of a saturation mode. Because operation in a linear mode results in smaller drain-to-source voltage drops, power consumption in the output current source or sink (and hence in the implantable stimulator) is reduced, reducing battery or other power source requirements. Operation in the linear mode is facilitated in useful embodiments by a load in an input path (into which a reference current is sent) and a load in the output path (which bears the output current). The loads can be active transistors or passive resistors. A feedback circuit (e.g.Type: GrantFiled: May 26, 2005Date of Patent: May 26, 2009Assignee: Boston Science Neuromodulation CorporationInventors: Jordi Parramon, Yuping He, Kiran Nimmagadda
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Publication number: 20080319497Abstract: An improved architecture for an implantable medical device such as an implantable pulse generator (IPG) is disclosed. In one embodiment, the various functional blocks for the IPG are incorporated into a signal integrated circuit (IC). Each of the functional blocks communicate with each other, and with other off-chip devices if necessary, via a centralized bus governed by a communication protocol. To communicate with the bus and to adhere to the protocol, each circuit block includes bus interface circuitry adherent with that protocol. Because each block complies with the protocol, any given block can easily be modified or upgraded without affecting the design of the other blocks, facilitating debugging and upgrading of the IPG circuitry. Moreover, because the centralized bus can be taken off the integrated circuit, extra circuitry can easily be added off chip to modify or add functionality to the IPG without the need for a major redesign of the main IPG IC.Type: ApplicationFiled: June 25, 2007Publication date: December 25, 2008Applicant: ADVANCED BIONICS CORPORATIONInventors: Paul J. Griffith, Jordi Parramon, Goran N. Marnfeldt, Daniel Aghassian, Kiran Nimmagadda, Emanuel Feldman, Jess W. Shi
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Publication number: 20080097529Abstract: Disclosed herein are circuits and methods for a multi-electrode implantable stimulator device incorporating one decoupling capacitor in the current path established via at least one cathode electrode and at least one anode electrode. In one embodiment, the decoupling capacitor may be hard-wired to a dedicated anode on the device. The cathodes are selectively activatable via stimulation switches. In another embodiment, any of the electrodes on the devices can be selectively activatable as an anode or cathode. In this embodiment, the decoupling capacitor is placed into the current path via selectable anode and cathode stimulation switches. Regardless of the implementation, the techniques allow for the benefits of capacitive decoupling without the need to associate decoupling capacitors with every electrode on the multi-electrode device, which saves space in the body of the device.Type: ApplicationFiled: October 18, 2006Publication date: April 24, 2008Applicant: Advanced Bionics CorporationInventors: Jordi Parramon, Kiran Nimmagadda, Emanuel Feldman, Yuping He
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Publication number: 20050267546Abstract: In one embodiment, the present invention provides an implantable stimulation device that includes output current sources and/or sinks configured to provide an output current for a load (i.e., tissue). The output path of the output current source or sink comprises a transistor which operates in a linear mode instead of a saturation mode. Because operation in a linear mode results in smaller drain-to-source voltage drops, power consumption in the output current source or sink (and hence in the implantable stimulator) is reduced, reducing battery or other power source requirements. Operation in the linear mode is facilitated in useful embodiments by a load in an input path (into which a reference current is sent) and a load in the output path (which bears the output current). The loads can be active transistors or passive resistors. A feedback circuit (e.g.Type: ApplicationFiled: May 26, 2005Publication date: December 1, 2005Inventors: Jordi Parramon, Yuping He, Kiran Nimmagadda
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Patent number: 6348830Abstract: A subharmonic double-balanced mixer (SDBM) combines a first signal having an RF frequency and a plurality of LO drive signals each having a frequency approximately one-half the RF frequency to obtain an output signal having an intermediate frequency. The intermediate frequency can be the baseband signal in direct conversion receivers. Two embodiments of the current invention using a two-level transistor circuit are described. In one of the embodiments, the RF section is in the bottom level transistors and in the other, the LO section is in the bottom level transistors. The device occupies a substantially reduced area on a semiconductor chip when compared with prior art devices.Type: GrantFiled: May 8, 2000Date of Patent: February 19, 2002Assignee: The Regents of The University of MichiganInventors: Gabriel M. Rebeiz, Kiran Nimmagadda