Patents by Inventor Tuofei Chen

Tuofei Chen 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).

  • Apparatuses and methods involving amplification circuit with push-pull waveshaping operation
    Patent number: 12506452
    Abstract: In certain examples, methods and semiconductor structures are directed to circuit-based apparatus in which an amplifier includes stacked, first and second circuit amplification stages to operate out of phase from one another for providing a push-pull operation, with each of the first and second circuit stages including a switching circuit and an impedance path to drive the switching circuit. The apparatus further includes a waveform-shaping circuit to shape, in response to each of the first and second circuit stages, a voltage signal for presentation to the switching circuit. As may be implemented in various more-specific examples, the apparatus may generate a constant output voltage with high efficiency across a wide range of resistive loads.
    Type: Grant
    Filed: March 12, 2021
    Date of Patent: December 23, 2025
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Juan Rivas-Davila, Lei Gu, Tuofei Chen
  • APPARATUSES AND METHODS INVOLVING AMPLIFICATION CIRCUIT WITH PUSH-PULL WAVESHAPING OPERATION
    Publication number: 20230122538
    Abstract: In certain examples, methods and semiconductor structures are directed to circuit-based apparatus in which an amplifier includes stacked, first and second circuit amplification stages to operate out of phase from one another for providing a push-pull operation, with each of the first and second circuit stages including a switching circuit and an impedance path to drive the switching circuit. The apparatus further includes a waveform-shaping circuit to shape, in response to each of the first and second circuit stages, a voltage signal for presentation to the switching circuit. As may be implemented in various more-specific examples, the apparatus may generate a constant output voltage with high efficiency across a wide range of resistive loads.
    Type: Application
    Filed: March 12, 2021
    Publication date: April 20, 2023
    Inventors: Juan Rivas-Davila, Lei Gu, Tuofei Chen