Patents by Inventor Yvonne Ko

Yvonne Ko 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).

  • Precision relaxation oscillator without comparator delay errors
    Patent number: 7109804
    Abstract: A relaxation oscillator for generating an oscillator output signal having a predetermined frequency. The relaxation oscillator includes an interleaved charge pump for providing a restoring charge to an integrator in response to at least one charge pump control signal. The relaxation oscillator further includes an integrator having an integrator input connected to the current summing node. The integrator is adapted to produce an integrator output signal having the predetermined frequency at an integrator output. A comparator having an input connected to the integrator output is adapted to generate the oscillator output signal having the predetermined frequency in response to the integrator output signal.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: September 19, 2006
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Urs H. Mader, Yvonne Ko, Franco Cocetta, Jeff Kotowski, Xiaoying Yu
  • Precision relaxation oscillator without comparator delay errors
    Publication number: 20050237118
    Abstract: A relaxation oscillator for generating an oscillator output signal having a predetermined frequency. The relaxation oscillator includes an interleaved charge pump for providing a restoring charge to an integrator in response to at least one charge pump control signal. The relaxation oscillator further includes an integrator having an integrator input connected to the current summing node. The integrator is adapted to produce an integrator output signal having the predetermined frequency at an integrator output. A comparator having an input connected to the integrator output is adapted to generate the oscillator output signal having the predetermined frequency in response to the integrator output signal.
    Type: Application
    Filed: April 27, 2004
    Publication date: October 27, 2005
    Inventors: Urs Mader, Yvonne Ko, Franco Cocetta, Jeff Kotowski, Xiaoying Yu