Patents by Inventor Sunil A. Bhave

Sunil A. Bhave 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).

  • Publication number: 20210058061
    Abstract: A piezoelectric structure is disclosed which includes a single crystal having piezoelectric coefficients d31 and d32 of opposite magnitude, such that when an alternating electric field is applied in the Z direction, the piezoelectric structure expands in one of the X and Y directions and contracts in the other of the X and Y direction, a first electrode coupled to the single crystal, and a second electrode coupled to the single crystal, wherein the alternating electric field is input to the single crystal through the first and second electrodes.
    Type: Application
    Filed: August 20, 2019
    Publication date: February 25, 2021
    Applicant: Purdue Research Foundation
    Inventors: Sunil A. Bhave, Pen-Li Yu
  • Publication number: 20200284584
    Abstract: A sensor for measuring rate of rotation is disclosed which includes a disk resonator, an anchor coupled to the disk resonator and further coupled to a substrate, and an optical waveguide wrapping around at least a portion of the perimeter of the disk resonator, the optical waveguide having an input end and an output end, wherein the disk resonator is configured to expand radially when subject to a rotational input, and wherein said radial expansion is adapted to cause a change in an optical signal passing through the optical waveguide.
    Type: Application
    Filed: March 5, 2020
    Publication date: September 10, 2020
    Applicant: Purdue Research Foundation
    Inventor: Sunil Bhave
  • Patent number: 10705223
    Abstract: Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: July 7, 2020
    Assignee: Cornell University
    Inventors: Rajit Manohar, Benjamin Tang, Stephen Longfield, Sunil A. Bhave
  • Publication number: 20190317222
    Abstract: Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.
    Type: Application
    Filed: November 13, 2018
    Publication date: October 17, 2019
    Inventors: Rajit Manohar, Benjamin Tang, Stephen Longfield, Sunil A. Bhave
  • Patent number: 10126428
    Abstract: Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: November 13, 2018
    Assignee: Cornell University
    Inventors: Rajit Manohar, Benjamin Tang, Stephen Longfield, Sunil A. Bhave
  • Patent number: 9528829
    Abstract: Gyroscopes based on optomechanical designs to provide sensitive sensing while providing relatively large bandwidth and dynamic range with enhanced noise performance.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: December 27, 2016
    Assignee: CORNELL UNIVERSITY
    Inventors: Sunil Bhave, Renyuan Wang
  • Patent number: 9069004
    Abstract: Methods, structures, devices and systems are disclosed for implementing optomechanical sensors in various configurations by using two optically coupled optical resonators or cavities that can be move or deform relative to each other. The optical coupling between first and second optical cavities to produce an optical resonance that varies with a spacing between the first and second optical cavities and provide the basis for the optomechanical sensing. Compact and integrated optomechanical sensors can be constructed to provide sensitive measurements for a range of applications, including motion sensing and other sensing applications.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: June 30, 2015
    Assignee: Cornell University
    Inventors: Sunil A. Bhave, David Neil Hutchison
  • Patent number: 9036951
    Abstract: An electro-optic structure, which may comprise an acousto-optic modulator for use in an opto-acoustic oscillator, comprises a plurality of rigidly connected resonator core components located movably separated over a substrate and anchored to the substrate at an anchor point. An actuator electrode is located separated from a first one of the rigidly connected resonator core components and an optical waveguide is located separated from a second one of the rigidly connected resonator core components. Radio frequency and direct current actuation of the actuator electrode provides a mechanical vibration in the first rigidly connected resonator core component that is mechanically coupled to the second rigidly connected resonator core component which serves to optically modulate light transported through the wave guide. Reverse operation is also contemplated. Embodiments also contemplate a third rigidly connected resonator core component as a radiation pressure driven detector.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: May 19, 2015
    Assignee: CORNELL UNIVERSITY
    Inventors: Sunil Bhave, Suresh Sridaran
  • Publication number: 20150022397
    Abstract: Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.
    Type: Application
    Filed: February 25, 2013
    Publication date: January 22, 2015
    Inventors: Rajit Manohar, Benjamin Tang, Stephen Longfield, Sunil A. Bhave
  • Publication number: 20140283601
    Abstract: Methods, structures, devices and systems are disclosed for implementing optomechanical sensors in various configurations by using two optically coupled optical resonators or cavities that can be move or deform relative to each other. The optical coupling between first and second optical cavities to produce an optical resonance that varies with a spacing between the first and second optical cavities and provide the basis for the optomechanical sensing. Compact and integrated optomechanical sensors can be constructed to provide sensitive measurements for a range of applications, including motion sensing and other sensing applications.
    Type: Application
    Filed: October 8, 2012
    Publication date: September 25, 2014
    Inventors: Sunil A. Bhave, David Neil Hutchison
  • Publication number: 20140260614
    Abstract: Gyroscopes based on optomechanical designs to provide sensitive sensing while providing relatively large bandwidth and dynamic range with enhanced noise performance.
    Type: Application
    Filed: July 16, 2012
    Publication date: September 18, 2014
    Applicant: CORNELL UNIVERSITY
    Inventors: Sunil Bhave, Renyuan Wang
  • Patent number: 8624337
    Abstract: A resonator body has an inversion gate, an accumulation gate, and a center region. The resonator body also has a source contact coupled to the center region and a drain contact coupled to the center region. The resonator body further has a first dielectric layer coupled between the inversion gate and the center region. The resonator body also has a second dielectric layer coupled between the accumulation gate and the center region. A resonant body transistor is also disclosed. The resonant body transistor has an inversion gate electrode, an accumulation gate electrode, a source electrode, a drain electrode, and a plurality of anchor beams. The resonant body transistor also has a resonator body coupled-to and suspended-from the inversion gate electrode, the accumulation gate electrode, the source electrode, and the drain electrode by the plurality of anchor beams. A resonant body oscillator is also disclosed.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: January 7, 2014
    Assignee: Cornell University
    Inventors: Dana Weinstein, Sunil A. Bhave
  • Publication number: 20120294564
    Abstract: An electro-optic structure, which may comprise an acousto-optic modulator for use in an opto-acoustic oscillator, comprises a plurality of rigidly connected resonator core components located movably separated over a substrate and anchored to the substrate at an anchor point. An actuator electrode is located separated from a first one of the rigidly connected resonator core components and an optical waveguide is located separated from a second one of the rigidly connected resonator core components. Radio frequency and direct current actuation of the actuator electrode provides a mechanical vibration in the first rigidly connected resonator core component that is mechanically coupled to the second rigidly connected resonator core component which serves to optically modulate light transported through the wave guide. Reverse operation is also contemplated. Embodiments also contemplate a third rigidly connected resonator core component as a radiation pressure driven detector.
    Type: Application
    Filed: July 24, 2012
    Publication date: November 22, 2012
    Applicant: Cornell University - Cornell Center for Technology Enterprise & Commercialzation (CCTEC)
    Inventors: Sunil Bhave, Suresh Sridaran
  • Patent number: 8111114
    Abstract: A tunable MEMS filter is disclosed, having a substrate with first and second isolated substrate areas. First and second anchor points are coupled to the substrate. A base is coupled to the first and second anchor points by first and second coupling beams, respectively. A dielectric layer is coupled to the base. An input conductor is coupled to the at least one dielectric layer. An output conductor is coupled to the at least one dielectric layer. A method of tuning a center frequency and a bandwidth of a MEMS resonator filter is also disclosed. A first bias voltage is adjusted between a base layer and input and output conductor layers. A second bias voltage is adjusted between the base layer and isolated substrate areas. The center frequency and the bandwidth are determined until the adjustments to the bias voltages provide a desired center frequency and a desired bandwidth.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: February 7, 2012
    Assignee: Cornell Center for Technology, Enterprise & Commericialization
    Inventors: Sunil Bhave, Lih Feng Cheow
  • Publication number: 20110024812
    Abstract: A resonator body has an inversion gate, an accumulation gate, and a center region. The resonator body also has a source contact coupled to the center region and a drain contact coupled to the center region. The resonator body further has a first dielectric layer coupled between the inversion gate and the center region. The resonator body also has a second dielectric layer coupled between the accumulation gate and the center region. A resonant body transistor is also disclosed. The resonant body transistor has an inversion gate electrode, an accumulation gate electrode, a source electrode, a drain electrode, and a plurality of anchor beams. The resonant body transistor also has a resonator body coupled-to and suspended-from the inversion gate electrode, the accumulation gate electrode, the source electrode, and the drain electrode by the plurality of anchor beams. A resonant body oscillator is also disclosed.
    Type: Application
    Filed: December 11, 2008
    Publication date: February 3, 2011
    Inventors: Dana Weinstein, Sunil A. Bhave
  • Publication number: 20090322448
    Abstract: A tamable MEMS filter is disclosed, having a substrate with first and second isolated substrate areas. First and second anchor points are coupled to the substrate. A base is coupled to the first and second anchor points by first and second coupling beams, respectively. A dielectric layer is coupled to the base. An input conductor is coupled to the at least one dielectric layer. An output conductor is coupled to the at least one dielectric layer. A method of tuning a center frequency and a bandwidth of a MEMS resonator filter is also disclosed. A first bias voltage is adjusted between a base layer and input and output conductor layers. A second bias voltage is adjusted between the base layer and isolated substrate areas. The center frequency and the bandwidth are determined until the adjustments to the bias voltages provide a desired center frequency and a desired bandwidth.
    Type: Application
    Filed: May 2, 2007
    Publication date: December 31, 2009
    Applicant: CORNELL RESEARCH FOUNDATION, INC.
    Inventors: Sunil Bhave, Lih Feng Cheow
  • Patent number: 7522019
    Abstract: An electrostatic transducer for micromechanical resonators, in which the electrode gaps are filled with a dielectric material having a much higher permittivity than air. This internal electrostatic transducer has several advantages over both air-gap electrostatic and piezoelectric transduction; including lower motional impedance, compatibility with advanced scaled CMOS device technology, and extended dynamic range. In one aspect, in order to minimize energy losses, the dielectric material has an acoustic velocity which is matched to that of the resonator material. Internal electrostatic transduction can be adapted to excite and detect either vertical modes (perpendicular to the substrate) or lateral modes (in the plane of the substrate). Its increased transduction efficiency is of particular importance for reducing the motional resistance of the latter.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: April 21, 2009
    Assignee: The Regents of the University of California
    Inventors: Sunil A. Bhave, Roger T. Howe
  • Publication number: 20070103258
    Abstract: A MEMS filter has an input layer for receiving a signal input, and an output layer for providing a signal output. The MEMS filter also has a first resonator and a second resonator coupled to the first resonator such that movement transduced in the first resonator by the signal input causes movement of the second resonator which transduces the signal output. A method of manufacturing a MEMS filter is also disclosed. A dielectric layer is formed on a base. A patterned electrode layer is formed at least in part on the dielectric layer. The base is etched to define a resonator structure. A method of adjusting a desired input impedance and an output impedance of a dielectrically transduced MEMS filter having transduction electrodes coupled to a dielectric film is further disclosed. The method includes adjusting a DC bias voltage on the transduction electrodes.
    Type: Application
    Filed: November 3, 2006
    Publication date: May 10, 2007
    Inventors: Dana Weinstein, Sunil Bhave
  • Publication number: 20060017523
    Abstract: An electrostatic transducer for micromechanical resonators, in which the electrode gaps are filled with a dielectric material having a much higher permittivity than air. This internal electrostatic transducer has several advantages over both air-gap electrostatic and piezoelectric transduction; including lower motional impedance, compatibility with advanced scaled CMOS device technology, and extended dynamic range. In one aspect, in order to minimize energy losses, the dielectric material has an acoustic velocity which is matched to that of the resonator material. Internal electrostatic transduction can be adapted to excite and detect either vertical modes (perpendicular to the substrate) or lateral modes (in the plane of the substrate). Its increased transduction efficiency is of particular importance for reducing the motional resistance of the latter.
    Type: Application
    Filed: June 3, 2005
    Publication date: January 26, 2006
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Sunil Bhave, Roger Howe