Patents by Inventor Deepak Ranjan Sahoo
Deepak Ranjan Sahoo 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: 20240121556Abstract: A device for manipulating an incident acoustic wave to generate an acoustic output is described wherein the device comprises a plurality of unit cells arranged into an array, at least some of said unit cells being configured to introduce time delays to an incident acoustic wave at the respective positions of the unit cells within the array of unit cells, such that said plurality of unit cells define an array of time delays to thereby define a spatial delay distribution for manipulating an incident acoustic wave to generate an acoustic output. The array of time delays may be re-configured to vary the spatial delay distribution of the device in order to generate different acoustic outputs. Also described are methods for designing or configuring such devices.Type: ApplicationFiled: October 10, 2023Publication date: April 11, 2024Inventors: Sriram Subramanian, Gianluca Memoli, Bruce Drinkwater, Mihai Caleap, Deepak Ranjan Sahoo
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Patent number: 11785384Abstract: A device for manipulating an incident acoustic wave to generate an acoustic output is described wherein the device comprises a plurality of unit cells arranged into an array, at least some of said unit cells being configured to introduce time delays to an incident acoustic wave at the respective positions of the unit cells within the array of unit cells, such that said plurality of unit cells define an array of time delays to thereby define a spatial delay distribution for manipulating an incident acoustic wave to generate an acoustic output. The array of time delays may be re-configured to vary the spatial delay distribution of the device in order to generate different acoustic outputs. Also described are methods for designing or configuring such devices.Type: GrantFiled: January 17, 2022Date of Patent: October 10, 2023Assignee: The University of SussexInventors: Sriram Subramanian, Gianluca Memoli, Bruce Drinkwater, Mihai Caleap, Deepak Ranjan Sahoo
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Publication number: 20220303681Abstract: A device for manipulating an incident acoustic wave to generate an acoustic output is described wherein the device comprises a plurality of unit cells arranged into an array, at least some of said unit cells being configured to introduce time delays to an incident acoustic wave at the respective positions of the unit cells within the array of unit cells, such that said plurality of unit cells define an array of time delays to thereby define a spatial delay distribution for manipulating an incident acoustic wave to generate an acoustic output. The array of time delays may be re-configured to vary the spatial delay distribution of the device in order to generate different acoustic outputs. Also described are methods for designing or configuring such devices.Type: ApplicationFiled: January 17, 2022Publication date: September 22, 2022Inventors: Sriram Subramanian, Gianluca Memoli, Bruce Drinkwater, Mihai Caleap, Deepak Ranjan Sahoo
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Patent number: 11228838Abstract: A device for manipulating an incident acoustic wave to generate an acoustic output is described wherein the device comprises a plurality of unit cells arranged into an array, at least some of said unit cells being configured to introduce time delays to an incident acoustic wave at the respective positions of the unit cells within the array of unit cells, such that said plurality of unit cells define an array of time delays to thereby define a spatial delay distribution for manipulating an incident acoustic wave to generate an acoustic output. The array of time delays may be re-configured to vary the spatial delay distribution of the device in order to generate different acoustic outputs. Also described are methods for designing or configuring such devices.Type: GrantFiled: December 18, 2020Date of Patent: January 18, 2022Assignee: The University of SussexInventors: Sriram Subramanian, Gianluca Memoli, Bruce Drinkwater, Mihai Caleap, Deepak Ranjan Sahoo
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Publication number: 20210195332Abstract: A device for manipulating an incident acoustic wave to generate an acoustic output is described wherein the device comprises a plurality of unit cells arranged into an array, at least some of said unit cells being configured to introduce time delays to an incident acoustic wave at the respective positions of the unit cells within the array of unit cells, such that said plurality of unit cells define an array of time delays to thereby define a spatial delay distribution for manipulating an incident acoustic wave to generate an acoustic output. The array of time delays may be re-configured to vary the spatial delay distribution of the device in order to generate different acoustic outputs. Also described are methods for designing or configuring such devices.Type: ApplicationFiled: December 18, 2020Publication date: June 24, 2021Inventors: Sriram Subramanian, Gianluca Memoli, Bruce Drinkwater, Mihai Caleap, Deepak Ranjan Sahoo
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Patent number: 10873812Abstract: A device (20) for manipulating an incident acoustic wave to generate an acoustic output is described wherein the device comprises a plurality of unit cells arranged into an array, at least some of said unit cells being configured to introduce time delays to an incident acoustic wave at the respective positions of the unit cells within the array of unit cells, such that said plurality of unit cells define an array of time delays to thereby define a spatial delay distribution for manipulating an incident acoustic wave to generate an acoustic output (30). The array of time delays may be re-configured to vary the spatial delay distribution of the device in order to generate different acoustic outputs. Also described are methods for designing or configuring such devices.Type: GrantFiled: February 9, 2018Date of Patent: December 22, 2020Assignee: The University of SussexInventors: Sriram Subramanian, Gianluca Memoli, Bruce Drinkwater, Mihai Caleap, Deepak Ranjan Sahoo
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Publication number: 20190364362Abstract: A device (20) for manipulating an incident acoustic wave to generate an acoustic output is described wherein the device comprises a plurality of unit cells arranged into an array, at least some of said unit cells being configured to introduce time delays to an incident acoustic wave at the respective positions of the unit cells within the array of unit cells, such that said plurality of unit cells define an array of time delays to thereby define a spatial delay distribution for manipulating an incident acoustic wave to generate an acoustic output (30). The array of time delays may be re-configured to vary the spatial delay distribution of the device in order to generate different acoustic outputs. Also described are methods for designing or configuring such devices.Type: ApplicationFiled: February 9, 2018Publication date: November 28, 2019Inventors: Sriram Subramanian, Gianluca Memoli, Bruce Drinkwater, Mihai Caleap, Deepak Ranjan Sahoo
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Patent number: 8484760Abstract: A device including a first part and a second part, one of which is a cantilever, the first and second parts being connected to each other and movable relative to each other. The device includes a magnetic element arranged on the first part and configured to provide a magnetic field. The device further includes a magnetization device arranged on the second part and configured to provide an actuation magnetic field which interacts with the magnetic field of the magnetic element, thereby causing or suppressing relative movement of the first and second parts. A scanning system including such a device is also described.Type: GrantFiled: November 23, 2010Date of Patent: July 9, 2013Assignee: International Business Machines CorporationInventors: Michael Despont, Venkataraman Kartik, Charalampos Pozidis, Deepak Ranjan Sahoo
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Patent number: 8395877Abstract: A micro-electro mechanical device includes a first structure, a second structure offset from the first structure by a gap. The first structure is configured to be electrostatically actuated to deflect relative to second structure. A pulse generator is configured to combine at least two different pulses to electrostatically drive at least one of the first structure and the second structure between an initial position and a final position.Type: GrantFiled: February 12, 2009Date of Patent: March 12, 2013Assignee: International Business Machines CorporationInventors: Charalampos Pozidis, Angeliki Pantazi, Abu Sebastian, Deepak Ranjan Sahoo
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Publication number: 20110321202Abstract: An apparatus is provided and includes a cantilever having a tip at a distal end thereof disposed with the tip positioned an initial distance from a sample and a circuit electrically coupled to a substrate on which the sample is layered and the cantilever to simultaneously apply direct and alternating currents to deflect the cantilever and to cause the tip to oscillate about a point at a second distance from the sample, which is shorter than the initial distance, between first positions, at which the tip contacts the sample, and second positions, at which the tip is displaced from the sample.Type: ApplicationFiled: June 28, 2010Publication date: December 29, 2011Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Venkataraman Kartik, Charalampos Pozidis, Deepak Ranjan Sahoo, Abu Sebastian
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Patent number: 8026719Abstract: A topography sensor and method include a probe configured to traverse a surface to determine a topography. A stray magnetic field is disposed in proximity to the probe. A magneto-resistive sensor is configured so that the stray magnetic field passing through it changes in accordance with positional changes of the probe as the probe tip traverses the surface.Type: GrantFiled: October 3, 2008Date of Patent: September 27, 2011Assignee: International Business Machines CorporationInventors: Peter Baechtold, Urs T. Duerig, Walter Haeberle, Armin W. Knoll, Charalampos Pozidis, Deepak Ranjan Sahoo, Gian R. Salis, Abu Sebastian
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Patent number: 8026715Abstract: A position sensor and method include a magnetic component, a first magneto-resistive sensor disposed in proximity to the magnet/coil; and a second magneto-resistive sensor disposed in proximity to the magnetic component and the first magneto-resistive sensor. The first magneto-resistive sensor and second magneto-resistive sensor are configured to sense changes in a stray magnetic field created by the magnetic component in accordance with a relative positional change between the magnetic component and the first and second magneto-resistive sensors.Type: GrantFiled: October 3, 2008Date of Patent: September 27, 2011Assignee: International Business Machines CorporationInventors: Charalampos Pozidis, Deepak Ranjan Sahoo, Abu Sebastian
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Publication number: 20110126329Abstract: A device including a first part and a second part, one of which is a cantilever, the first and second parts being connected to each other and movable relative to each other. The device includes a magnetic element arranged on the first part and configured to provide a magnetic field. The device further includes a magnetization device arranged on the second part and configured to provide an actuation magnetic field which interacts with the magnetic field of the magnetic element, thereby causing or suppressing relative movement of the first and second parts. A scanning system including such a device is also described.Type: ApplicationFiled: November 23, 2010Publication date: May 26, 2011Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Michel Despont, Venkataraman Kartik, Charalampos Pozidis, Deepak Ranjan Sahoo
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Publication number: 20100201289Abstract: A micro-electro mechanical device includes a first structure, a second structure offset from the first structure by a gap. The first structure is configured to be electrostatically actuated to deflect relative to second structure. A pulse generator is configured to combine at least two different pulses to electrostatically drive at least one of the first structure and the second structure between an initial position and a final position.Type: ApplicationFiled: February 12, 2009Publication date: August 12, 2010Inventors: Charalampos Pozidis, Angeliki Pantazi, Abu Sebastian, Deepak Ranjan Sahoo
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Publication number: 20100085041Abstract: A position sensor and method include a magnetic component, a first magneto-resistive sensor disposed in proximity to the magnet/coil; and a second magneto-resistive sensor disposed in proximity to the magnetic component and the first magneto-resistive sensor. The first magneto-resistive sensor and second magneto-resistive sensor are configured to sense changes in a stray magnetic field created by the magnetic component in accordance with a relative positional change between the magnetic component and the first and second magneto-resistive sensors.Type: ApplicationFiled: October 3, 2008Publication date: April 8, 2010Inventors: Charalamois Pozidis, Deepak Ranjan Sahoo, Abu Sebastian
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Publication number: 20100085056Abstract: A topography sensor and method include a probe configured to traverse a surface to determine a topography. A stray magnetic field is disposed in proximity to the probe. A magneto-resistive sensor is configured so that the stray magnetic field passing through it changes in accordance with positional changes of the probe as the probe tip traverses the surface.Type: ApplicationFiled: October 3, 2008Publication date: April 8, 2010Inventors: Peter Baechtold, Urs T. Duerig, Walter Haeberle, Armin W. Knoll, Charalampos Pozidis, Deepak Ranjan Sahoo, Gian R. Salis, Abu Sebastian
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Patent number: 7627438Abstract: An observer based Q control method for a cantilever in an atomic force microscopy is provided that provides for a “dual” Q behavior such that a particular effective Q is achieved when a sample is present and another effective Q when a sample is absent. In the control method, the transfer function from dither input to photo-diode output is independent of the observer so that the cantilever effectively behaves like a spring-mass-damper system. The effective quality factor and stiffness of the cantilever can be changed by appropriately choosing the state feedback gain. The method provides sample-imaging using transient atomic force microscopy.Type: GrantFiled: April 27, 2007Date of Patent: December 1, 2009Assignee: Iowa State University Research Foundation, Inc.Inventors: Murti V. Salapaka, Deepak Ranjan Sahoo
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Patent number: 7360405Abstract: An approach to determine cantilever movement is presented. An observer based state estimation and statistical signal detection and estimation techniques are applied to Atomic Force Microscopes. A first mode approximation model of the cantilever is considered and an observer is designed to estimate the dynamic states. The cantilever-sample interaction is modeled as an impulsive force applied to the cantilever in order to detect the presence of sample. A generalized likelihood ratio test is performed to obtain the decision rule and the maximum likelihood estimation of the unknown arrival time of the sample profile and unknown magnitude of it. The use of the transient data results in sample detection at least ten times faster than using the steady state characteristics.Type: GrantFiled: May 31, 2006Date of Patent: April 22, 2008Assignee: Iowa State University Research Foundation, Inc.Inventors: Murti V. Salapaka, Abu Sebastian, Deepak Ranjan Sahoo
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Patent number: 7313948Abstract: An approach to detect when a cantilever loses interaction with a sample, thereby detecting when a portion of an image obtained using a cantilever is spurious is presented. An observer based estimation of cantilever deflection is compared to the cantilever deflection and the resulting innovation is used to detect when the cantilever loses interaction. The loss of interaction is determined when the innovation is outside of and/or below a threshold level.Type: GrantFiled: May 22, 2006Date of Patent: January 1, 2008Assignee: Iowa State University Research FoundationInventors: Murti V. Salapaka, Tathagata De, Pranav Agarwal, Deepak Ranjan Sahoo
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Patent number: 7066014Abstract: An approach to determine cantilever movement is presented. An observer based state estimation and statistical signal detection and estimation techniques are applied to Atomic Force Microscopes. A first mode approximation model of the cantilever is considered and a Kalman filter is designed to estimate the dynamic states. The tip-sample interaction is modeled as an impulsive force applied to the cantilever in order to detect the presence of sample. A generalized likelihood ratio test is performed to obtain the decision rule and the maximum likelihood estimation of the unknown arrival time of the sample profile and unknown magnitude of it. The use of the transient data results in sample detection at least ten times faster than using the steady state characteristics.Type: GrantFiled: September 29, 2004Date of Patent: June 27, 2006Assignee: Iowa State University Research Foundation, Inc.Inventors: Murti V. Salapaka, Abu Sebastian, Deepak Ranjan Sahoo