Patents by Inventor Wallace Alane Pimenta

Wallace Alane Pimenta 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).

  • Bootstrap clamping circuit for DC/DC regulators and method thereof
    Patent number: 7518352
    Abstract: A clamping circuit of a DC/DC regulator includes a reference current generator to generate a reference current. The reference current can be based upon a specified maximum voltage across a bootstrap capacitor of the DC/DC regulator. The clamping circuit also includes a current generator that generates a current based on the voltage across the bootstrap capacitor. The current generated by the current generator is compared to the generated reference current. Based on the comparison, the voltage across the bootstrap capacitor is regulated. By regulating the voltage across the bootstrap capacitor based on current, rather than based directly on the voltage across the capacitor, the design of the clamping circuit is simplified compared to voltage-based implementations.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: April 14, 2009
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Jader Alves De Lima Filho, Richard Titov Lara Saez, Wallace Alane Pimenta
  • BOOTSTRAP CLAMPING CIRCUIT FOR DC/DC REGULATORS AND METHOD THEREOF
    Publication number: 20080278135
    Abstract: A clamping circuit of a DC/DC regulator includes a reference current generator to generate a reference current. The reference current can be based upon a specified maximum voltage across a bootstrap capacitor of the DC/DC regulator. The clamping circuit also includes a current generator that generates a current based on the voltage across the bootstrap capacitor. The current generated by the current generator is compared to the generated reference current. Based on the comparison, the voltage across the bootstrap capacitor is regulated. By regulating the voltage across the bootstrap capacitor based on current, rather than based directly on the voltage across the capacitor, the design of the clamping circuit is simplified compared to voltage-based implementations.
    Type: Application
    Filed: May 11, 2007
    Publication date: November 13, 2008
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Jader Alves De Lima Filho, Richard Titov Lara Saez, Wallace Alane Pimenta