Patents by Inventor Hiroko Takano

Hiroko Takano 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).

  • Semiconductor integrated circuit having controllable internal supply voltage
    Patent number: 7071768
    Abstract: In an integrated circuit having an internal supply voltage generation circuit which generates an internal supply voltage by descending an external supply voltage, there is provided an internal circuit which operates with a supplied internal supply voltage. The internal supply voltage generation circuit changes an internal supply voltage level to be generated in accordance with an operation speed of the internal circuit. Preferably the semiconductor integrated circuit includes a clock control circuit which generates an internal clock signal the frequency of which is controlled in accordance with the operation speed of the internal circuit. When the internal clock signal is controlled to have a higher frequency, the internal supply voltage is controlled to be higher. Also, when the internal clock signal is controlled to have a lower frequency, the internal supply voltage is controlled to be lower.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: July 4, 2006
    Assignee: Fujitsu Limited
    Inventors: Hiroyuki Abe, Yutaka Takasuka, Hisao Ise, Hiroko Takano, Sachie Takahashi
  • Semiconductor integrated circuit having controllable internal supply voltage
    Publication number: 20040057324
    Abstract: In an integrated circuit having an internal supply voltage generation circuit which generates an internal supply voltage by descending an external supply voltage, there is provided an internal circuit which operates with a supplied internal supply voltage. The internal supply voltage generation circuit changes an internal supply voltage level to be generated in accordance with an operation speed of the internal circuit. Preferably the semiconductor integrated circuit includes a clock control circuit which generates an internal clock signal the frequency of which is controlled in. accordance with the operation speed of the internal circuit. When the internal clock signal is controlled to have a higher frequency, the internal supply voltage is controlled to be higher. Also, when the internal clock signal is controlled to have a lower frequency, the internal supply voltage is controlled to be lower.
    Type: Application
    Filed: July 29, 2003
    Publication date: March 25, 2004
    Inventors: Hiroyuki Abe, Yutaka Takasuka, Hisao Ise, Hiroko Takano, Sachie Takahashi