Patents by Inventor Balamurugan Sundaram
Balamurugan Sundaram 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: 9721463Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined.Type: GrantFiled: March 29, 2016Date of Patent: August 1, 2017Assignee: Endotronix, Inc.Inventors: Harry Rowland, Roger Watkins, Balamurugan Sundaram
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Publication number: 20170061168Abstract: Disclosed is a self-test device and method for assessing the functional performance of a reader device that is configured to interface with a wireless sensor. The self-test device may be configured to analyze the accuracy of a signal transmitted from the reader device or the accuracy of a signal received by the reader device. In one embodiment, the reader device may be configured to engage the self-test device to allow the reader to transmit a signal, such as a short pulse of energy or a short burst of radio frequency energy to cause the self-test device to output a resonant signal. The self-test device may receive the transmit signal from the reader and evaluate it against predetermined values. The evaluated signals may be used to assess the accuracy of the transmit signal of the reader device to identify potential calibration issues and initiate remedial action by an automated system or human intervention if needed.Type: ApplicationFiled: September 2, 2015Publication date: March 2, 2017Inventors: Balamurugan Sundaram, Michael Nagy, Douglas Nielsen, Suresh Sundaram
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Publication number: 20170055048Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined. The reader uses an ambient reading or other information to select a subset of the possible ring signal frequencies, and tunes or adjusts its circuits and algorithms to focus on that subset.Type: ApplicationFiled: November 7, 2016Publication date: February 23, 2017Inventors: Michael Nagy, Harry D. Rowland, Balamurugan Sundaram
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Patent number: 9489831Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined. The reader uses an ambient reading or other information to select a subset of the possible ring signal frequencies, and tunes or adjusts its circuits and algorithms to focus on that subset.Type: GrantFiled: September 30, 2013Date of Patent: November 8, 2016Assignee: Endotronix, Inc.Inventors: Michael Nagy, Harry D. Rowland, Roger Dwight Watkins, Balamurugan Sundaram
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Publication number: 20160210846Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined.Type: ApplicationFiled: March 29, 2016Publication date: July 21, 2016Inventors: Harry Rowland, Roger Watkins, Balamurugan Sundaram
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Patent number: 9305456Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined.Type: GrantFiled: April 9, 2013Date of Patent: April 5, 2016Assignee: Endotronix, Inc.Inventors: Harry Rowland, Roger Watkins, Balamurugan Sundaram
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Publication number: 20160029956Abstract: A wireless circuit includes a housing having at least one opening, and sensor connected to the housing at the opening. The sensor includes a first layer having a first dimension and a second layer having a second dimension shorter than the first dimension. The second layer may be positioned entirely within the housing and a surface of said first layer may be exposed to an exterior of the housing.Type: ApplicationFiled: March 17, 2014Publication date: February 4, 2016Inventors: Harry ROWLAND, Michael NAGY, Roger WATKINS, Balamurugan SUNDARAM, Suresh SUNDARAM
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Patent number: 9024704Abstract: This invention provides a novel electronically tunable active duplexer for wireless transceiver applications. It relates to an active duplexer with full-duplex operation, permitting simultaneous transmission and reception of signals at same or different frequencies. Instead of incorporating fixed or mechanically adjustable capacitors, and even instead of incorporating varactor diodes, it incorporates one or more capacitance tuning circuit in phase shifting networks enabling one to electronically tune, with ease and precision, the frequency at which isolation is desired, over a band in both transmit and receive modes of operations.Type: GrantFiled: October 26, 2012Date of Patent: May 5, 2015Assignee: Bradley UniversityInventors: Prasad Narasimha Shastry, Sureshbabu Sundaram, Balamurugan Sundaram
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Publication number: 20150080875Abstract: A microwave ablation system and method is disclosed comprising a balloon catheter apparatus and a control system. The balloon catheter apparatus comprises a catheter configured to house a coaxial cable and one or more coolant channels, an inflatable balloon located at the distal end of the catheter, and an antenna positioned in the inflatable balloon and in communication with the coaxial cable. The control system comprises a fluid pump configured to introduce fluid into a proximal end of the catheter, a power amplifier capable of generating microwave energy for delivery to the target tissue zone for at least one energy application cycle ranging from 60 seconds to 600 seconds at a frequency ranging from 2.4 GHz to 2.5 GHz, and a computer system configured to monitor and/or regulate the delivery of microwave energy to the target tissue, the fluid pump, at least one sensor, and antenna reflected power.Type: ApplicationFiled: September 10, 2014Publication date: March 19, 2015Inventors: Daniel Kasprzyk, Justin Preston, Seth Crozier, Sohail Desai, Roger D. Watkins, Balamurugan Sundaram, Sureshbabu Sundaram
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Publication number: 20140257266Abstract: A method and balloon catheter apparatus for tissue ablation is disclosed. The apparatus comprises an elongated shaft having a proximal end, a distal end, one or more central lumens, adapted for positioning in an artery; an emitter capable of emitting microwave energy positioned at the distal end; an inflatable balloon associated with the emitter at the distal end configured to allow blood to pass through the artery while the balloon is inflated; and a control system at the proximal end. The method and balloon catheter apparatus is applicable at least to renal denervation procedures.Type: ApplicationFiled: March 6, 2014Publication date: September 11, 2014Applicant: SYMPLE SURGICAL INC.Inventors: Daniel Kasprzyk, Justin Preston, Seth Crozier, Sohail Desai, Roger D. Watkins, Balamurugan Sundaram, Sureshbabu Sundaram
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Publication number: 20140118083Abstract: This invention provides a novel electronically tunable active duplexer for wireless transceiver applications. It relates to an active duplexer with full-duplex operation, permitting simultaneous transmission and reception of signals at same or different frequencies. Instead of incorporating fixed or mechanically adjustable capacitors, and even instead of incorporating varactor diodes, it incorporates one or more capacitance tuning circuit in phase shifting networks enabling one to electronically tune, with ease and precision, the frequency at which isolation is desired, over a band in both transmit and receive modes of operations.Type: ApplicationFiled: October 26, 2012Publication date: May 1, 2014Applicant: BRADLEY UNIVERSITYInventors: PRASAD NARASIMHA SHASTRY, SURESHBABU SUNDARAM, BALAMURUGAN SUNDARAM
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Publication number: 20140028467Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined. The reader uses an ambient reading or other information to select a subset of the possible ring signal frequencies, and tunes or adjusts its circuits and algorithms to focus on that subset.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: Endotronix, Inc.Inventors: Michael Nagy, Harry D. Rowland, Roger Dwight Watkins, Balamurugan Sundaram
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Patent number: 8570186Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined. The reader uses an ambient reading or other information to select a subset of the possible ring signal frequencies, and tunes or adjusts its circuits and algorithms to focus on that subset.Type: GrantFiled: April 25, 2012Date of Patent: October 29, 2013Assignee: Endotronix, Inc.Inventors: Michael Nagy, Harry D. Rowland, Roger Dwight Watkins, Balamurugan Sundaram
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Patent number: 8493187Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits a narrowband, fixed frequency excitation pulse to cause the wireless sensor to generate a ring signal. The ring signal corresponds to the value of the physical parameter being sensed. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined. The low power, simple circuitry required to generate the excitation pulse allows the reader to be a small, battery operated unit. Alternative methods of frequency determination are also disclosed.Type: GrantFiled: March 19, 2010Date of Patent: July 23, 2013Assignee: Endotronix, Inc.Inventors: Harry D. Rowland, Roger Dwight Walking, Balamurugan Sundaram, Bryan Paul, In Soo Ahn, Michael Nagy
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Patent number: 8432265Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined.Type: GrantFiled: March 19, 2012Date of Patent: April 30, 2013Assignee: Endotronix, Inc.Inventors: Harry D. Rowland, Roger Dwight Watkins, Balamurugan Sundaram
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Publication number: 20120319862Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined. The reader uses an ambient reading or other information to select a subset of the possible ring signal frequencies, and tunes or adjusts its circuits and algorithms to focus on that subset.Type: ApplicationFiled: April 25, 2012Publication date: December 20, 2012Inventors: Michael Nagy, Harry D. Rowland, Roger Dwight Watkins, Balamurugan Sundaram
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Publication number: 20120286934Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined.Type: ApplicationFiled: March 19, 2012Publication date: November 15, 2012Inventors: Harry D. Rowland, Roger Dwight Watkins, Balamurugan Sundaram
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Patent number: 8154389Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined.Type: GrantFiled: April 7, 2009Date of Patent: April 10, 2012Assignee: Endotronix, Inc.Inventors: Harry D. Rowland, Roger Dwight Watkins, Balamurugan Sundaram
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Publication number: 20100308974Abstract: A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits a narrowband, fixed frequency excitation pulse to cause the wireless sensor to generate a ring signal. The ring signal corresponds to the value of the physical parameter being sensed. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined. The low power, simple circuitry required to generate the excitation pulse allows the reader to be a small, battery operated unit. Alternative methods of frequency determination are also disclosed.Type: ApplicationFiled: March 19, 2010Publication date: December 9, 2010Inventors: Harry D. Rowland, Roger Dwight Walking, Balamurugan Sundaram, Bryan Paul, In Soo Ahn, Michael Nagy
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Patent number: 7746067Abstract: A machine includes a component. The machine may also include a position-sensing system with a plurality of sensor elements that each generate a signal related to proximity of the sensor element to the component by generating the signal based at least in part on the magnetic permeability of the space adjacent the sensor element and a time-varying magnetic field generated by an electric circuit of the position-sensing system. The machine may also include one or more information-processing devices that determine a positional relationship between the component and the plurality of sensor elements based on a plurality of the signals generated by the sensor elements.Type: GrantFiled: August 31, 2007Date of Patent: June 29, 2010Assignee: Caterpillar Inc.Inventors: Everett Gene Brandt, David Abraham Paul, Shoji Tozawa, Roger Dwight Watkins, Balamurugan Sundaram, Seppo Saario