Patents by Inventor Viswajit Natarajan

Viswajit Natarajan 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).

  • Coil driving in wireless charging system
    Patent number: 11750030
    Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes multiple coils that may be driven independently based on a feedback system with one or more feedback channels. Each coil is driven by a coil driving signal selected based on a set of target characteristics. A coil drive circuit receives an input of a pulse width modulation (PWM) signal and outputs the coil driving signal to a corresponding coil.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: September 5, 2023
    Assignee: AIRA, INC.
    Inventors: William Paul Abajian, Jules Marie Xavier Laffitte, John MacDonald, Viswajit Natarajan, Christopher William Sarli, Lixin Shi, Jake Lee Vander Ploeg, Xiaoping Zhu, Mark Huan Mekkittikul
  • High precision signal measurement in wireless charging system
    Patent number: 11336116
    Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes multiple coils that may be driven independently based on a feedback system with one or more feedback channels. One of the feedback channels may be a voltage and/or current measurement of coil driving signals from the coils that are indicative of receiver device presences on the wireless charging system. A coil driving signal may be sampled and processed using discrete Fourier transform to determine amplitude and phase information of the signal.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: May 17, 2022
    Assignee: AIRA, INC.
    Inventors: William Paul Abajian, Jules Marie Xavier Laffitte, John MacDonald, Viswajit Natarajan, Lixin Shi, Jake Lee Vander Ploeg, Xiaoping Zhu
  • Coil selection in multi-coil wireless charging system
    Patent number: 11031817
    Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes a plurality of coils for wireless charging the one or more receiver devices. The wireless charging system may use a machine learning algorithm to detect the one or more receiver devices and select which of the multiple coils to activate for charging the multiple coils. Based on measurements made from signal through the coils within the wireless charging system, the machine learning algorithm determines a subset of the coils to activate for charging the detected one or more receiver devices.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: June 8, 2021
    Inventors: William Paul Abajian, Jules Marie Xavier Laffitte, John MacDonald, Viswajit Natarajan, Lixin Shi, Xiaoping Zhu
  • COIL SELECTION IN MULTI-COIL WIRELESS CHARGING SYSTEM
    Publication number: 20200336018
    Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes a plurality of coils for wireless charging the one or more receiver devices. The wireless charging system may use a machine learning algorithm to detect the one or more receiver devices and select which of the multiple coils to activate for charging the multiple coils. Based on measurements made from signal through the coils within the wireless charging system, the machine learning algorithm determines a subset of the coils to activate for charging the detected one or more receiver devices.
    Type: Application
    Filed: January 30, 2020
    Publication date: October 22, 2020
    Inventors: William Paul Abajian, Jules Marie Xavier Laffitte, John MacDonald, Viswajit Natarajan, Lixin Shi, Xiaoping Zhu
  • HIGH PRECISION SIGNAL MEASUREMENT IN WIRELESS CHARGING SYSTEM
    Publication number: 20200333387
    Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes multiple coils that may be driven independently based on a feedback system with one or more feedback channels. One of the feedback channels may be a voltage and/or current measurement of coil driving signals from the coils that are indicative of receiver device presences on the wireless charging system. A coil driving signal may be sampled and processed using discrete Fourier transform to determine amplitude and phase information of the signal.
    Type: Application
    Filed: January 30, 2020
    Publication date: October 22, 2020
    Inventors: William Paul Abajian, Jules Marie Xavier Laffitte, John MacDonald, Viswajit Natarajan, Lixin Shi, Jake Lee Vander Ploeg, Xiaoping Zhu
  • COIL DRIVING IN WIRELESS CHARGING SYSTEM
    Publication number: 20200336008
    Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes multiple coils that may be driven independently based on a feedback system with one or more feedback channels. Each coil is driven by a coil driving signal selected based on a set of target characteristics. A coil drive circuit receives an input of a pulse width modulation (PWM) signal and outputs the coil driving signal to a corresponding coil.
    Type: Application
    Filed: January 30, 2020
    Publication date: October 22, 2020
    Inventors: William Paul Abajian, Jules Marie Xavier Laffitte, John MacDonald, Viswajit Natarajan, Christopher William Sarli, Lixin Shi, Jake Lee Vander Ploeg, Xiaoping Zhu, Mark Huan Mekkittikul