Patents by Inventor Swee Kiat Yap

Swee Kiat Yap 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).

  • Method for generating multiple incremental output voltages using a single charge pump chain
    Patent number: 8030988
    Abstract: A method and apparatus for generating multiple voltage level outputs from a single series of charge pump stages. The apparatus includes a plurality of voltage output circuits electrically connected in series. A selected number of the voltage output circuits include voltage output nodes that are available to be connected to loads. A control component in each voltage output circuit regulates operation of the charge pump stages within that circuit to provide a voltage level at the voltage output node regulated independently of other voltage output circuits in the series. The method and apparatus has the advantage of reducing the number of charge pump stages required to achieve a plurality of different voltage output levels. In another embodiment, the method and apparatus recycles charge within the apparatus by transferring charge between voltage output circuits through a load.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: October 4, 2011
    Assignees: STMicroelectronics Asia Pacific Pte. Ltd., STMicroelectronics (Grenoble 2) SAS
    Inventors: Swee Kiat Yap, Olivier Le-Briz, Sze-Kwang Tan
  • METHOD FOR GENERATING MULTIPLE INCREMENTAL OUTPUT VOLTAGES USING A SINGLE CHARGE PUMP CHAIN
    Publication number: 20110156803
    Abstract: A method and apparatus for generating multiple voltage level outputs from a single series of charge pump stages. The apparatus includes a plurality of voltage output circuits electrically connected in series. A selected number of the voltage output circuits include voltage output nodes that are available to be connected to loads. A control component in each voltage output circuit regulates operation of the charge pump stages within that circuit to provide a voltage level at the voltage output node regulated independently of other voltage output circuits in the series. The method and apparatus has the advantage of reducing the number of charge pump stages required to achieve a plurality of different voltage output levels. In another embodiment, the method and apparatus recycles charge within the apparatus by transferring charge between voltage output circuits through a load.
    Type: Application
    Filed: December 31, 2009
    Publication date: June 30, 2011
    Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD.
    Inventors: Swee Kiat Yap, Olivier Le-Briz, Sze-Kwang Tan