Patents by Inventor Mao Cyuan Jian

Mao Cyuan Jian 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).

  • DC-to-DC step-up converter and conversion method thereof
    Patent number: 7245114
    Abstract: The present invention discloses a DC-to-DC step-up converter to which a logic control unit is added in order to reduce the ripples of a DC output voltage and improve the power quality. The converter of the present invention comprises a step-up circuit, a ring oscillator, a divider circuit, a PFM (pulse frequency modulation) comparator and a logic control unit. The step-up circuit is used to step up a source voltage to generate a DC output voltage. The ring oscillator is used to generate an oscillator output signal. The divider circuit receives the DC output voltage to generate a feedback voltage. The PFM comparator compares the feedback voltage with a reference voltage to generate a comparator output signal to control outputting of the oscillator output signal.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: July 17, 2007
    Assignee: Advanced Analog Technology, Inc.
    Inventors: Chu Yu Chu, You Min Sun, Mao Cyuan Jian, Shih Jie Liao