Patents by Inventor Naoki Hishikawa

Naoki Hishikawa 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).

  • Patent number: 7759987
    Abstract: A semiconductor integrated circuit includes a high-side transistor, a low-side transistor, a level shift circuit for driving the high-side transistor, and a pre-driver circuit for driving the low-side transistor. A connection point of the high-side transistor and the low-side transistor serves as an output terminal. The level shift circuit has first and second N-type MOS transistors whose gates are driven by the pre-driver circuit. The semiconductor integrated circuit further includes a diode whose anode is connected to the drain of the first or second N-type MOS transistor to which the gate of the high-side transistor is not connected, and whose cathode is connected to the output terminal.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: July 20, 2010
    Assignee: Panasonic Corporation
    Inventors: Naoki Hishikawa, Hiroki Matsunaga, Jinsaku Kaneda
  • Publication number: 20090195482
    Abstract: A PDP-driving semiconductor integrated circuit includes a plurality of PDP drivers each for converting an input signal into a high-voltage pulse having an amplitude greater than that of the input signal and outputting the high-voltage pulse. The PDP-driving semiconductor integrated circuit has a function of performing sequential operation in which the PDP drivers operate at different timings and sequentially output the high-voltage pulses and a function of performing simultaneous operation in which the PDP drivers operate at the same timing and output the high-voltage pulses at a time. In each of the sequential operation and the simultaneous operation, at least one of the speed of change in voltage level of the high-voltage pulse from a low level to a high level and the speed of change in voltage level of the high-voltage pulse from the high level to the low level is controlled.
    Type: Application
    Filed: September 29, 2008
    Publication date: August 6, 2009
    Inventors: Eisaku MAEDA, Hiroshi ANDO, Naoki HISHIKAWA, Jinsaku KANEDA, Hiroki MATSUNAGA
  • Publication number: 20090045480
    Abstract: A semiconductor integrated circuit includes a plurality of circuit cells on a semiconductor chip. The plurality of circuit cells are formed along a first chip side of the semiconductor chip. Each of the plurality of circuit cells has a pad. The semiconductor integrated circuit further includes a high voltage potential interconnect formed over the plurality of circuit cells. The high voltage potential interconnect has a width expanding in a length direction from a center portion to end portions of the high voltage potential interconnect.
    Type: Application
    Filed: November 7, 2006
    Publication date: February 19, 2009
    Inventors: Hiroki Matsunaga, Naoki Hishikawa, Akihiro Maejima, Jinsaku Kaneda, Hiroshi Ando
  • Publication number: 20080246529
    Abstract: A semiconductor integrated circuit includes a high-side transistor, a low-side transistor, a level shift circuit for driving the high-side transistor, and a pre-driver circuit for driving the low-side transistor. A connection point of the high-side transistor and the low-side transistor serves as an output terminal. The level shift circuit has first and second N-type MOS transistors whose gates are driven by the pre-driver circuit. The semiconductor integrated circuit further includes a diode whose anode is connected to the drain of the first or second N-type MOS transistor to which the gate of the high-side transistor is not connected, and whose cathode is connected to the output terminal.
    Type: Application
    Filed: March 14, 2008
    Publication date: October 9, 2008
    Inventors: Naoki Hishikawa, Hiroki Matsunaga, Jinsaku Kaneda