Patents by Inventor Tutomu Taniguti

Tutomu Taniguti 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).

  • Programmable semiconductor memory device
    Patent number: 6262924
    Abstract: A semiconductor memory device is provided with terminals for receiving a chip enable signal and an address signal, an internal circuit, and an internal control signal generating circuit for generating a predetermined internal control signal which makes an output timing of the semiconductor memory device same regardless of a level of the address signal when the chip enable signal undergoes a transition from an inactive level to an active level. The internal circuit is deactivated in response to the inactive level of the chip enable signal and is activated in response to the active level of the chip enable signal.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: July 17, 2001
    Assignee: Fujitsu Limited
    Inventors: Yutaka Fukutani, Tomohiro Nakayama, Seizi Hirayama, Waichiro Fujieda, Arayama Youji, Atsushi Fujii, Yoshitaka Takahashi, Masanori Nagasawa, Masakazu Kimura, Tutomu Taniguti, Hiroyuki Fujimoto
  • Programmable semiconductor memory device
    Patent number: 6026052
    Abstract: A semiconductor memory device is provided with terminals for receiving a chip enable signal and an address signal, an internal circuit, and an internal control signal generating circuit for generating a predetermined internal control signal which makes an output timing of the semiconductor memory device same regardless of a level of the address signal when the chip enable signal undergoes a transition from an inactive level to an active level. The internal circuit is deactivated in response to the inactive level of the chip enable signal and is activated in response to the active level of the chip enable signal.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: February 15, 2000
    Assignee: Fujitsu Limited
    Inventors: Yutaka Fukutani, Tomohiro Nakayama, Seizi Hirayama, Waichiro Fujieda, Arayama Youji, Atsushi Fujii, Yoshitaka Takahashi, Masanori Nagasawa, Masakazu Kimura, Tutomu Taniguti, Hiroyuki Fujimoto
  • Programmable semiconductor memory device
    Patent number: 5831933
    Abstract: A semiconductor memory device is provided with terminals for receiving a chip enable signal and an address signal, an internal circuit, and an internal control signal generating circuit for generating a predetermined internal control signal which makes an output timing of the semiconductor memory device same regardless of a level of the address signal when the chip enable signal undergoes a transition from an inactive level to an active level. The internal circuit is deactivated in response to the inactive level of the chip enable signal and is activated in response to the active level of the chip enable signal.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: November 3, 1998
    Assignee: Fujitsu Limited
    Inventors: Yutaka Fukutani, Tomohiro Nakayama, Seizi Hirayama, Waichiro Fujieda, Arayama Youji, Atsushi Fujii, Yoshitaka Takahashi, Masanori Nagasawa, Masakazu Kimura, Tutomu Taniguti, Hiroyuki Fujimoto
  • Programmable semiconductor memory device
    Patent number: 5661694
    Abstract: A semiconductor memory device is provided with terminals for receiving a chip enable signal and an address signal, an internal circuit, and an internal control signal generating circuit for generating a predetermined internal control signal which makes an output timing of the semiconductor memory device same regardless of a level of the address signal when the chip enable signal undergoes a transition from an inactive level to an active level. The internal circuit is deactivated in response to the inactive level of the chip enable signal and is activated in response to the active level of the chip enable signal.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: August 26, 1997
    Assignee: Fujitsu Limited
    Inventors: Yutaka Fukutani, Tomohiro Nakayama, Seizi Hirayama, Waichiro Fujieda, Arayama Youji, Atsushi Fujii, Yoshitaka Takahashi, Masanori Nagasawa, Masakazu Kimura, Tutomu Taniguti, Hiroyuki Fujimoto