Patents by Inventor Naresh Kesavan Rao
Naresh Kesavan Rao 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: 11674918Abstract: A monolithic gas-sensing chip assembly for sensing a gas analyte includes a sensing material to detect the gas analyte, a sensing system including a resistor-capacitor electrical circuit, and a heating element. A sensing circuit measures an electrical response of the sensing system to an alternating electrical current applied to the sensing system at (a) one or more different frequencies, or (b) one or more different resistor-capacitor configurations of the system. One or more processors control a low detection range of the system to the gas, a high detection range of the system to the gas, a linearity of a response of the system to the gas, a dynamic range of measurements of the gas by the system, a rejection of interfering gas analytes by the system, a correction for aging or poisoning of the system, or a rejection of ambient interferences that may affect the electrical response of the system.Type: GrantFiled: April 7, 2022Date of Patent: June 13, 2023Assignee: General Electric CompanyInventors: Radislav Alexandrovich Potyrailo, Emad Andarawis Andarawis, Naresh Kesavan Rao
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Publication number: 20220229005Abstract: A monolithic gas-sensing chip assembly for sensing a gas analyte includes a sensing material to detect the gas analyte, a sensing system including a resistor-capacitor electrical circuit, and a heating element. A sensing circuit measures an electrical response of the sensing system to an alternating electrical current applied to the sensing system at (a) one or more different frequencies, or (b) one or more different resistor-capacitor configurations of the system. One or more processors control a low detection range of the system to the gas, a high detection range of the system to the gas, a linearity of a response of the system to the gas, a dynamic range of measurements of the gas by the system, a rejection of interfering gas analytes by the system, a correction for aging or poisoning of the system, or a rejection of ambient interferences that may affect the electrical response of the system.Type: ApplicationFiled: April 7, 2022Publication date: July 21, 2022Inventors: Radislav Alexandrovich Potyrailo, Emad Andarawis Andarawis, Naresh Kesavan Rao
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Patent number: 11300534Abstract: A monolithic gas-sensing chip assembly for sensing a gas analyte includes a sensing material to detect the gas analyte, a sensing system including a resistor-capacitor electrical circuit, and a heating element. A sensing circuit measures an electrical response of the sensing system to an alternating electrical current applied to the sensing system at (a) one or more different frequencies, or (b) one or more different resistor-capacitor configurations of the system. One or more processors control a low detection range of the system to the gas, a high detection range of the system to the gas, a linearity of a response of the system to the gas, a dynamic range of measurements of the gas by the system, a rejection of interfering gas analytes by the system, a correction for aging or poisoning of the system, or a rejection of ambient interferences that may affect the electrical response of the system.Type: GrantFiled: September 6, 2019Date of Patent: April 12, 2022Assignee: GENERAL ELECTRIC COMPANYInventors: Radislav Alexandrovich Potyrailo, Emad Andarawis Andarawis, Naresh Kesavan Rao
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Publication number: 20210072175Abstract: A monolithic gas-sensing chip assembly for sensing a gas analyte includes a sensing material to detect the gas analyte, a sensing system including a resistor-capacitor electrical circuit, and a heating element. A sensing circuit measures an electrical response of the sensing system to an alternating electrical current applied to the sensing system at (a) one or more different frequencies, or (b) one or more different resistor-capacitor configurations of the system. One or more processors control a low detection range of the system to the gas, a high detection range of the system to the gas, a linearity of a response of the system to the gas, a dynamic range of measurements of the gas by the system, a rejection of interfering gas analytes by the system, a correction for aging or poisoning of the system, or a rejection of ambient interferences that may affect the electrical response of the system.Type: ApplicationFiled: September 6, 2019Publication date: March 11, 2021Inventors: Radislav Alexandrovich Potyrailo, Emad Andarawis Andarawis, Naresh Kesavan Rao
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Publication number: 20180360421Abstract: A transducer assembly is provided. The transducer assembly includes an aperture comprising a plurality of transducer elements. The transducer assembly also includes a plurality of first-level summers, wherein each transducer element is configured to be switchably coupled to at least four of the plurality of first-level summers. The transducer assembly further includes a plurality of second-level summers, wherein an output of each of the plurality of first-level summers is configured to be switchably coupled to an input of one of the plurality of second-level summers.Type: ApplicationFiled: June 15, 2017Publication date: December 20, 2018Inventors: Kenneth Wayne Rigby, Ying Fan, Naresh Kesavan Rao, Christopher Robert Hazard
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Publication number: 20180360422Abstract: A transducer assembly is provided. The transducer assembly includes a routing layer. The transducer assembly further includes a plurality of transducer elements arranged on a first side of the interposer. The transducer assembly also includes a first application specific integrated circuit (ASIC) arranged vertically below the plurality of transducer elements and on a second side of the interposer, wherein the first ASIC comprises a plurality of signal conditioning circuits.Type: ApplicationFiled: June 15, 2017Publication date: December 20, 2018Inventors: Kenneth Wayne Rigby, Ying Fan, Naresh Kesavan Rao, Christopher Robert Hazard
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Publication number: 20180234059Abstract: A system including a low noise amplifier is provided. The system further includes a coarse attenuation circuit coupled to an input of the low noise amplifier and configurable to attenuate an input signal by a coarse attenuation interval. The system also includes a fine attenuation circuit coupled in feedback with the low noise amplifier and configurable to attenuate the input signal by a fine attenuation interval, wherein the fine attenuation interval is less than the coarse attenuation interval.Type: ApplicationFiled: February 14, 2017Publication date: August 16, 2018Inventors: Naresh Kesavan Rao, Krishnakumar Sundaresan, Nanette Judith Gruber, Bruno Hans Haider
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Patent number: 9722626Abstract: An analog-to-digital converter (ADC) is provided includes a first sigma-delta modulator (SDM) electrically coupled to a first signal input. The first SDM includes a first summing junction configured to receive a plurality of inputs to the first SDM. The ADC further includes a second sigma-delta modulator (SDM) electrically coupled to a second signal input. The second SDM includes a second summing junction configured to receive a plurality of inputs to the second SDM. The first SDM also includes a cross-coupled feedback loop from an output of the first SDM to a negative input of the first summing junction and to a positive input of the second summing junction. The second SDM also includes a cross-coupled feedback loop from an output of the second SDM to a negative input of the first summing junction and to a negative input of the second summing junction.Type: GrantFiled: January 5, 2015Date of Patent: August 1, 2017Assignee: GENERAL ELECTRIC COMPANYInventors: Amit Satish Gore, Emad Andarawis Andarawis, Naresh Kesavan Rao
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Patent number: 9689996Abstract: Improved imaging systems are disclosed. More particularly, the present disclosure provides for an improved image sensor assembly for an imaging system, the image sensor assembly having an integrated photodetector array and its associated data acquisition electronics fabricated on the same substrate. By integrating the electronics on the same substrate as the photodetector array, this thereby reduces fabrications costs, and reduces interconnect complexity. Since both the photodiode contacts and the associated electronics are on the same substrate/plane, this thereby substantially eliminates certain expensive/time-consuming processing techniques. Moreover, the co-location of the electronics next to or proximal to the photodetector array provides for a much finer resolution detector assembly since the interconnect bottleneck between the electronics and the photodetector array is substantially eliminated/reduced.Type: GrantFiled: April 5, 2013Date of Patent: June 27, 2017Assignee: General Electric CompanyInventors: Naresh Kesavan Rao, James Wilson Rose, Christopher David Unger, Abdelaziz Ikhlef, Jonathan David Short
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Patent number: 9389260Abstract: An impedance analyzer is provided. The analyzer includes a signal excitation generator comprising a digital to analog converter, where a transfer function of the digital to analog converter from digital to analog is programmable. The impedance analyzer further includes a receiver comprising a low noise amplifier (LNA) and an analog to digital converter (ADC), where the LNA is a current to voltage converter; where the programmable digital to analog transfer function is implemented by a direct digital synthesizer (DDS) and a voltage mode digital to analog converter, or a digital phase locked loop (PLL), or both. Further, a multivariable sensor node having an impedance analyzer is provided. Furthermore, a multivariable sensor network having a plurality of multivariable sensor nodes is provided.Type: GrantFiled: September 28, 2012Date of Patent: July 12, 2016Assignee: General Electric CompanyInventors: Radislav Alexandrovich Potyrailo, Jeffrey Michael Ashe, Sm Shajed Hasan, Naresh Kesavan Rao, Krishnakumar Sundaresan
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Publication number: 20160197620Abstract: An analog-to-digital converter (ADC) is provided includes a first sigma-delta modulator (SDM) electrically coupled to a first signal input. The first SDM includes a first summing junction configured to receive a plurality of inputs to the first SDM. The ADC further includes a second sigma-delta modulator (SDM) electrically coupled to a second signal input. The second SDM includes a second summing junction configured to receive a plurality of inputs to the second SDM. The first SDM also includes a cross-coupled feedback loop from an output of the first SDM to a negative input of the first summing junction and to a positive input of the second summing junction. The second SDM also includes a cross-coupled feedback loop from an output of the second SDM to a negative input of the first summing junction and to a negative input of the second summing junction.Type: ApplicationFiled: January 5, 2015Publication date: July 7, 2016Inventors: Amit Satish Gore, Emad Andarawis Andarawis, Naresh Kesavan Rao
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Patent number: 9369140Abstract: An ultrasound probe analog to digital converter includes an input successive approximation register (SAR) first stage; and an output SAR second stage in communication with the input SAR first stage. The input SAR first stage includes a programmable preamplifier integrated therein for residue amplification. The preamplifier is programmed to alternate between a linear amplifier operating mode and a comparator operating mode.Type: GrantFiled: March 2, 2015Date of Patent: June 14, 2016Assignee: General Electric CompanyInventors: Krishnakumar Sundaresan, Naresh Kesavan Rao, Bruno Hans Haider, Christopher Robert Hazard
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Patent number: 9147144Abstract: A method for multivariable measurements using a single-chip impedance analyzer includes providing a sensor, exposing the sensor to an environmental parameter, determining a complex impedance of the sensor over a measured spectral frequency range of the sensor, and monitoring at least three spectral parameters of the sensor.Type: GrantFiled: September 28, 2012Date of Patent: September 29, 2015Assignee: General Electric CompanyInventors: Radislav Alexandrovich Potyrailo, Jeffrey Michael Ashe, Sm Shajed Hasan, Naresh Kesavan Rao, Krishnakumar Sundaresan
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Patent number: 8924600Abstract: A system is provided that includes a controller that is configured to enable communication between one or more sensors and a processor. The controller includes a plurality of input-output (IO) ports each configured to couple to the one or more sensors. Moreover, each of the IO ports is configured to couple to a plurality of sensor types such that each IO port is configured to couple more than one sensor type. The controller also includes an interface configured to receive a selection of a selected mode from a plurality of modes each corresponding to a sensor type. Furthermore, the controller includes a switch block having a plurality of switches each configured to toggle a connection in the switch block according to the selected mode.Type: GrantFiled: March 14, 2013Date of Patent: December 30, 2014Assignee: General Electric CompanyInventors: Daniel Milton Alley, Naresh Kesavan Rao, Alan Paul Mathason, Feng Chen, Stephen Emerson Douthit
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Publication number: 20140301534Abstract: Improved imaging systems are disclosed. More particularly, the present disclosure provides for an improved image sensor assembly for an imaging system, the image sensor assembly having an integrated photodetector array and its associated data acquisition electronics fabricated on the same substrate. By integrating the electronics on the same substrate as the photodetector array, this thereby reduces fabrications costs, and reduces interconnect complexity. Since both the photodiode contacts and the associated electronics are on the same substrate/plane, this thereby substantially eliminates certain expensive/time-consuming processing techniques. Moreover, the co-location of the electronics next to or proximal to the photodetector array provides for a much finer resolution detector assembly since the interconnect bottleneck between the electronics and the photodetector array is substantially eliminated/reduced.Type: ApplicationFiled: April 5, 2013Publication date: October 9, 2014Applicant: General Electric CompanyInventors: Naresh Kesavan Rao, James Wilson Rose, Christopher David Unger, Abdelaziz Ikhlef, Jonathan David Short
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Publication number: 20140281048Abstract: A system is provided that includes a controller that is configured to enable communication between one or more sensors and a processor. The controller includes a plurality of input-output (IO) ports each configured to couple to the one or more sensors. Moreover, each of the IO ports is configured to couple to a plurality of sensor types such that each IO port is configured to couple more than one sensor type. The controller also includes an interface configured to receive a selection of a selected mode from a plurality of modes each corresponding to a sensor type. Furthermore, the controller includes a switch block having a plurality of switches each configured to toggle a connection in the switch block according to the selected mode.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: General Electric CompanyInventors: Daniel Milton Alley, Naresh Kesavan Rao, Alan Paul Mathason, Feng Chen, Stephen Emerson Douthit
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Patent number: 8804909Abstract: A method for regulating the acquisition of an analog input signal from a digital X-ray panel is provided. The method includes opening a switch disposed between an integrator and the digital X-ray panel prior to an integrator event or upon detection of a fault in the digital X-ray panel to decouple the integrator from the digital X-ray panel, wherein the integrator is configured to integrate the analog input signal from the digital X-ray panel. Also, a system for data acquisition is provided. Further, a method for fault protection of the digital X-ray panel is provided.Type: GrantFiled: December 29, 2011Date of Patent: August 12, 2014Assignee: General Electric CompanyInventors: Naresh Kesavan Rao, Richard Gordon Cronce, German Guillermo Vera, Jianjun Guo
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Patent number: 8798229Abstract: Detector modules and methods of manufacturing are provided. One detector module includes a detector having a silicon wafer structure formed from a first layer having a first resistivity and a second layer having a second resistivity, wherein the first resistivity is greater than the second resistivity. The detector further includes a photosensor device provided with the first layer on a first side of the silicon wafer and one or more readout electronics provided with the second layer on a second side of the silicon wafer, with the first side being a different side than the second side.Type: GrantFiled: September 30, 2011Date of Patent: August 5, 2014Assignee: General Electric CompanyInventors: Wen Li, Naresh Kesavan Rao, Abdelaziz Ikhlef, Jeffrey Kautzer
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Publication number: 20140095102Abstract: An impedance analyzer is provided. The analyzer includes a signal excitation generator comprising a digital to analog converter, where a transfer function of the digital to analog converter from digital to analog is programmable. The impedance analyzer further includes a receiver comprising a low noise amplifier (LNA) and an analog to digital converter (ADC), where the LNA is a current to voltage converter; where the programmable digital to analog transfer function is implemented by a direct digital synthesizer (DDS) and a voltage mode digital to analog converter, or a digital phase locked loop (PLL), or both. Further, a multivariable sensor node having an impedance analyzer is provided. Furthermore, a multivariable sensor network having a plurality of multivariable sensor nodes is provided.Type: ApplicationFiled: September 28, 2012Publication date: April 3, 2014Applicant: GENERAL ELECTRIC COMPANYInventors: Radislav Alexandrovich Potyrailo, Jeffrey Michael Ashe, Sm Shajed Hasan, Naresh Kesavan Rao, Krishnakumar Sundaresan
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Publication number: 20140091811Abstract: A method for multivariable measurements using a single-chip impedance analyzer includes providing a sensor, exposing the sensor to an environmental parameter, determining a complex impedance of the sensor over a measured spectral frequency range of the sensor, and monitoring at least three spectral parameters of the sensor.Type: ApplicationFiled: September 28, 2012Publication date: April 3, 2014Applicant: GENERAL ELECTRIC COMPANYInventors: Radislav Alexandrovich Potyrailo, Jeffrey Michael Ashe, Sm Shajed Hasan, Naresh Kesavan Rao, Krishnakumar Sundaresan