Patents by Inventor Hiromichi Tokuhiro

Hiromichi Tokuhiro 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).

  • High-voltage driver and piezoelectric pump with built-in driver
    Patent number: 7902720
    Abstract: A digital waveform generating circuit having a DC voltage as an input and generating a sinusoidal digital signal, an active filter extracting low-frequency components from the sinusoidal digital signal generated in the digital waveform generating circuit, and a high-voltage control circuit generating a high-voltage drive signal using the sinusoidal digital signal after passing through the active filter are provided. A smooth waveform without steep voltage changes is generated.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: March 8, 2011
    Assignees: Sanyo Electric Co., Ltd., Sanyo Semiconductor Co., Ltd.
    Inventors: Jun Ishikawa, Yasuyuki Hattori, Akira Sato, Hiromichi Tokuhiro, Masashi Tanabe
  • HIGH-VOLTAGE DRIVER AND PIEZOELECTRIC PUMP WITH BUILT-IN DRIVER
    Publication number: 20090060762
    Abstract: A digital waveform generating circuit having a DC voltage as an input and generating a sinusoidal digital signal, an active filter extracting low-frequency components from the sinusoidal digital signal generated in the digital waveform generating circuit, and a high-voltage control circuit generating a high-voltage drive signal using the sinusoidal digital signal after passing through the active filter are provided. A smooth waveform without steep voltage changes is generated.
    Type: Application
    Filed: July 2, 2008
    Publication date: March 5, 2009
    Applicants: SANYO ELECTRIC CO., LTD., SANYO SEMICONDUCTOR CO., LTD.
    Inventors: Jun Ishikawa, Yasuyuki Hattori, Akira Sato, Hiromichi Tokuhiro, Masashi Tanabe