Patents by Inventor Yuriko Iizuka

Yuriko Iizuka 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).

  • Voltage generating circuit in semiconductor integrated circuit
    Patent number: 5633825
    Abstract: A voltage generating circuit in a semiconductor integrated circuit driven by two sorts of power supply voltages, includes a unit for generating plural sorts of signals; a unit for selecting one of the plural sorts of signals in response to an operation mode of the semiconductor integrated circuit; and a pumping unit for producing either a first predetermined voltage higher than the high power supply voltage among the two sorts of power supply voltages, or a second predetermined voltage lower than the low power supply voltage by a pumping operation based upon the signal selected by the selecting unit.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: May 27, 1997
    Assignees: Hitachi, Ltd., Texas Instruments, Inc.
    Inventors: Toshiyuki Sakuta, Tomohiro Suzuki, Yuriko Iizuka
  • Voltage generating circuit in semiconductor integrated circuit
    Patent number: 5528538
    Abstract: A voltage generating circuit in a semiconductor integrated circuit driven by two sorts of power supply voltages, includes a unit for generating plural sorts of signals; a unit for selecting one of the plural sorts of signals in response to an operation mode of the semiconductor integrated circuit; and a pumping unit for producing either a first predetermined voltage higher than the high power supply voltage among the two sorts of power supply voltages, or a second predetermined voltage lower than the low power supply voltage by a pumping operation based upon the signal selected by the selecting unit.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: June 18, 1996
    Assignees: Hitachi, Ltd., Texas Instruments Incorporated
    Inventors: Toshiyuki Sakuta, Tomohiro Suzuki, Yuriko Iizuka