Patents by Inventor Daisuke Shimadu

Daisuke Shimadu 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).

  • Publication number: 20080279033
    Abstract: A semiconductor integrated circuit device provided with a memory circuit having a word line selection circuit with reduced leakage current is provided. The memory circuit includes: second word lines with which memory cells are connected; multiple bit lines that are extended in a direction orthogonal thereto and electrically connected with memory cells corresponding to selected second word lines of a plurality of the second word lines; and word drivers, constructed of CMOS inverter circuits, that select or deselect the second word lines. The sources of p-channel MOSFETs that constitute a plurality of word drivers including second word lines corresponding to selected bit lines are supplied with a voltage at a level at which second word lines are selected. The sources of the p-channel MOSFETs of the other word drivers are supplied with a voltage corresponding to a level at which second word lines are deselected.
    Type: Application
    Filed: July 15, 2008
    Publication date: November 13, 2008
    Inventors: Masao Shinozaki, Daisuke Shimadu
  • Patent number: 7423909
    Abstract: A semiconductor integrated circuit device provided with a memory circuit having a word line selection circuit with reduced leakage current is provided. The memory circuit includes: second word lines with which memory cells are connected; multiple bit lines that are extended in a direction orthogonal thereto and electrically connected with memory cells corresponding to selected second word lines of a plurality of the second word lines; and word drivers, constructed of CMOS inverter circuits, that select or deselect the second word lines. The sources of p-channel MOSFETs that constitute a plurality of word drivers including second word lines corresponding to selected bit lines are supplied with a voltage at a level at which second word lines are selected. The sources of the p-channel MOSFETs of the other word drivers are supplied with a voltage corresponding to a level at which second word lines are deselected.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: September 9, 2008
    Assignee: Renesas Technology Corp.
    Inventors: Masao Shinozaki, Daisuke Shimadu
  • Publication number: 20060181955
    Abstract: A semiconductor integrated circuit device provided with a memory circuit having a word line selection circuit with reduced leakage current is provided. The memory circuit includes: second word lines with which memory cells are connected; multiple bit lines that are extended in a direction orthogonal thereto and electrically connected with memory cells corresponding to selected second word lines of a plurality of the second word lines; and word drivers, constructed of CMOS inverter circuits, that select or deselect the second word lines. The sources of p-channel MOSFETs that constitute a plurality of word drivers including second word lines corresponding to selected bit lines are supplied with a voltage at a level at which second word lines are selected. The sources of the p-channel MOSFETs of the other word drivers are supplied with a voltage corresponding to a level at which second word lines are deselected.
    Type: Application
    Filed: February 8, 2006
    Publication date: August 17, 2006
    Inventors: Masao Shinozaki, Daisuke Shimadu
  • Patent number: 6909653
    Abstract: The invention provides a semiconductor integrated circuit device having a signal transmission path realizing high speed and low power consumption with a simple configuration. The device has a signal transmission path for transmitting a signal by discharging one of first signal lines corresponding to complementary input signals in a plurality of first signal lines precharged by a precharge circuit, and a self reset circuit for detecting the discharge level of the pair of signal lines corresponding to the complementary signals out of the plurality of first signal lines and operating the precharge circuit at a timing later than the period of discharging.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: June 21, 2005
    Assignees: Renesas Technology Corporation, Hitachi ULSI Systems Co., Ltd.
    Inventors: Daisuke Shimadu, Hiroshi Toyoshima, Masahiko Nishiyama
  • Publication number: 20050047232
    Abstract: The invention provides a semiconductor integrated circuit device having a signal transmission path realizing high speed and low power consumption with a simple configuration. The device has a signal transmission path for transmitting a signal by discharging one of first signal lines corresponding to complementary input signals in a plurality of first signal lines precharged by a precharge circuit, and a self reset circuit for detecting the discharge level of the pair of signal lines corresponding to the complementary signals out of the plurality of first signal lines and operating the precharge circuit at a timing later than the period of discharging.
    Type: Application
    Filed: June 3, 2003
    Publication date: March 3, 2005
    Inventors: Daisuke Shimadu, Hiroshi Toyoshima, Masahiko Nishiyama