Patents by Inventor Junichi Okamura

Junichi Okamura 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: 20040036087
    Abstract: In a semiconductor integrated circuit including a phase comparison circuit for a DLL in a reception circuit for receiving serial digital transmission signals, phase detection characteristics of the phase comparison circuit are improved while preventing false lock so as to improve response speed and locking accuracy of the DLL as a whole.
    Type: Application
    Filed: January 2, 2003
    Publication date: February 26, 2004
    Inventor: Junichi Okamura
  • Patent number: 6532167
    Abstract: A voltage generator for outputting an output voltage at an output terminal thereof includes a driver MOS transistor of a first conductivity type having a first end connected to said output terminal and a capacitor connected between the output terminal and a second voltage node. The capacitor comprises a plurality of trench capacitors formed in a semiconductor substrate.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: March 11, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tetsuya Kaneko, Junichi Okamura
  • Publication number: 20030038845
    Abstract: A map database site S comprises a map information database Sb for accumulating the map data constructed of units for displaying of unit images m each having a display range smaller than a display range of a map image M corresponding to one page of a map image displayed on a user terminal T, in association with position data indicating the display ranges of the individual unit images m. A user terminal T comprises map-image display means for combining the map data of a plurality of units with each other on the basis of the associated position data, which are read out from the map information database Sb provided in the map database site S and transmitted from the map database site S, to form the one-page map image M for display.
    Type: Application
    Filed: July 23, 2002
    Publication date: February 27, 2003
    Applicant: Pioneer Corporation
    Inventor: Junichi Okamura
  • Publication number: 20030033202
    Abstract: A system 1 and method for producing and managing an advertisement is disclosed having an advertisement client head terminal 2 of an advertisement client who orders an object advertisement to be produced, an area base terminal 3 at each of area bases of the advertisement client, a production company terminal 4 of a production company which produces an advertisement part and advertisement design information, an advertisement production management server 5 which executes preliminary processing of separate examination for the advertisement part and the advertisement design information to produce a complete package to enable the advertisement to be altered upon receipt of an audience response, a broadcast entrepreneur 6 who executes separate examination of the advertisement and provides a broadcast of the advertisement, an audience terminal 7 from which the advertisement is viewed, and a response server 8 which collects the audience response.
    Type: Application
    Filed: August 9, 2002
    Publication date: February 13, 2003
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yukio Ogawa, Motomu Ootawa, Takashi Yamashita, Shigeo Nomura, Junichi Okamura, Keishi Higashi, Yukiteru Nozawa
  • Patent number: 6477079
    Abstract: A voltage generator for outputting an output voltage at an output terminal thereof includes a driver MOS transistor of a first conductivity type having a first end connected to said output terminal and a capacitor connected between the output terminal and a second voltage node. The capacitor comprises a plurality of trench capacitors formed in a semiconductor substrate.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: November 5, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tetsuya Kaneko, Junichi Okamura
  • Publication number: 20020110017
    Abstract: A voltage generator for outputting an output voltage at an output terminal thereof includes a driver MOS transistor of a first conductivity type having a first end connected to said output terminal and a capacitor connected between the output terminal and a second voltage node. The capacitor comprises a plurality of trench capacitors formed in a semiconductor substrate.
    Type: Application
    Filed: July 13, 2001
    Publication date: August 15, 2002
    Inventors: Tetsuya Kaneko, Junichi Okamura
  • Publication number: 20020101426
    Abstract: A map data memory area for storing map data read from external is set in a hard disk of an information terminal, the map information read from external is stored in the map data memory area, if the information terminal is requested to display a map image, whether or not the map data requested to be displayed is stored in the map data memory area is retrieved, if the map data requested to be displayed is stored in the map data memory area, the map data stored in the map data memory area is read and is displayed on the information terminal, and if the map data requested to be displayed is not stored in the map data memory area, the map data to be displayed is read from external and is displayed on the information terminal, and the read map data is stored in the map data memory area.
    Type: Application
    Filed: January 31, 2002
    Publication date: August 1, 2002
    Applicant: PIONEER CORPORATION
    Inventor: Junichi Okamura
  • Patent number: 6381186
    Abstract: A dynamic random access memory includes a plurality of dynamic memory cells arranged in rows and columns, a word line connected to the memory cells on the same row, a bit line connected to the memory cells on the same column, a word line selecting circuit having a word line selecting function of selecting an arbitrary one of the rows in response to an internal address signal, a word line driving voltage source, a word line driving circuit having at least one driving MOS transistor connected between the word line driving voltage source and the word line, for driving the word line in response to an output signal of the word line selecting circuit, and a control circuit for, in response to a voltage stress test control signal input from outside, controlling the word line driving circuit so that the word line driving circuit drives word lines more than those selected in a normal operation mode upon receiving an external address signal.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: April 30, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junichi Okamura, Tohru Furuyama
  • Publication number: 20020048205
    Abstract: A dynamic random access memory according to the present invention comprises a plurality of dynamic memory cells arranged in rows and columns, a word line connected to the memory cells on the same row, a bit line connected to the memory cells on the same column, a word line selecting circuit having a word line selecting function of selecting an arbitrary one of the rows in response to an internal address signal, a word line driving voltage source, a word line driving circuit having at least one driving MOS transistor connected between the word line driving voltage source and the word line, for driving the word line in response to an output signal of the word line selecting circuit, and a control circuit for, in response to a voltage stress test control signal input from outside, controlling the word line driving circuit so that the word line driving circuit drives word lines more than those selected in a normal operation mode upon receiving an external address signal.
    Type: Application
    Filed: August 28, 2001
    Publication date: April 25, 2002
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Junichi Okamura, Tohru Furuyama
  • Patent number: 6317366
    Abstract: A semiconductor memory device includes a memory cell having a transfer N-channel MOS transistor and a capacitive element for storing data which is connected to the transfer N-channel MOS transistor, a word line connected to a gate of the transfer N-channel transistor, of the memory cell, a charge pump circuit generating an internal power supply voltage which is boosted up from a power supply voltage, and outputting the internal power supply voltage, and a decoder circuit which receives address signals and has a P-channel MOS transistor for receiving the internal power supply voltage, the decoder circuit generating a word line selecting signal.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: November 13, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junichi Okamura, Tohru Furuyama
  • Patent number: 6307796
    Abstract: A dynamic random access memory includes a plurality of dynamic memory cells arranged in rows and columns, a word line connected to the memory cells on the same row, a bit line connected to the memory cells on the same column, a word line selecting circuit having a word line selecting function of selecting an arbitrary one of the rows in response to an internal address signal, a word line driving voltage source, a word line driving circuit having at least one driving MOS transistor connected between the word line driving voltage source and the word line, for driving the word line in response to an output signal of the word line selecting circuit, and a control circuit for, in response to a voltage stress test control signal input from outside, controlling the word line driving circuit so that the word line driving circuit drives word lines more than those selected in a normal operation mode upon receiving an external address signal.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: October 23, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junichi Okamura, Tohru Furuyama
  • Publication number: 20010021138
    Abstract: A voltage generator for outputting an output voltage at an output terminal thereof includes a driver MOS transistor of a first conductivity type having a first end connected to said output terminal and a capacitor connected between the output terminal and a second voltage node. The capacitor comprises a plurality of trench capacitors formed in a semiconductor substrate.
    Type: Application
    Filed: May 18, 1999
    Publication date: September 13, 2001
    Inventors: TETSUYA KANEKO, JUNICHI OKAMURA
  • Patent number: 6181618
    Abstract: The present invention is to provide a semiconductor memory device capable of realizing a high speed sensing operation and an enlarged sense margin, for ensuring the sensing operation even with a low power source voltage by connecting the bit line of the memory cell array portion and the bit line of the sense amplifier portion via the P-type transfer gate, having the bit line amplitude of the sense amplifier potion larger than the bit line amplitude of the memory cell array portion, and having different precharge voltages for the bit line of the sense amplifier portion and the bit line of the memory cell array portion.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: January 30, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsuneo Inaba, Kenji Tsuchida, Junichi Okamura
  • Patent number: 6166975
    Abstract: A dynamic random access memory includes a dynamic memory cell having a transfer N-channel MOS transistor and a capacitive element for storing data which is connected to the transfer N-channel MOS transistor, a word line connected to a gate of the transfer N-channel transistor, of the dynamic memory cell, and a word line driving voltage source, to which power voltage is input for raising the input power voltage to generate a word line driving voltage.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: December 26, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junichi Okamura, Tohru Furuyama
  • Patent number: 6140805
    Abstract: A voltage generator for generating an output voltage at an output terminal thereof which includes a first transistor of a first channel conductivity type having a first end connected to the output terminal and a feedback regulator connected to the output terminal. A switch is connected between a voltage node and a second end of the first transistor, the switch receiving a switching signal.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: October 31, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tetsuya Kaneko, Junichi Okamura
  • Patent number: 6101148
    Abstract: A dynamic random access memory includes a dynamic memory cell having a transfer N-channel MOS transistor and a capacitive element for storing data which is connected to the transfer N-channel MOS transistor, a word line connected to a gate of the transfer N-channel transistor, of the dynamic memory cell, and a word line driving voltage source, to which power voltage is input for raising the input power voltage to generate a word line driving voltage.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: August 8, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junichi Okamura, Tohru Furuyama
  • Patent number: 5929492
    Abstract: An integrated circuit pattern of a sense amplifier is disclosed. The sense amplifier includes a sense circuit connected to a memory array and a column gate. The sense circuit includes N-MOSFETs cross-coupled between paired bit lines. The column gate includes an N-MOSFET for connecting the bit line to a data line and an N-MOSFET for connecting the other bit line to another data line. The N-MOSFET contained in the sense circuit and the N-MOSFET contained in the column gate are integrated in one element region. Further, the N-MOSFET contained in the sense circuit and the N-MOSFET contained in the column gate are integrated in another element region.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: July 27, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Junichi Okamura
  • Patent number: 5894442
    Abstract: The present invention relates to a semiconductor memory device which, while preventing an operation error, achieves the shortening of a precharging time and, hence, further shortening of a cycle time of a memory operation. The equalizing control circuit includes a latch circuit. An equalizing control circuit receives a signal WLact and a signal X-ADR from a predecoder and outputs an equalizing signal EQS from these two signals. A latch circuit in the equalizing control circuit is set (the inactivation of an equalizing signal) by a signal X-ADR which is activated with an internal RAS signal and holds its state. The latch circuit is reset (the activation of the equalizing signal) by a signal corresponding to a word line active signal WLact with a word line inactivated. By doing so, it is possible to provide the equalizing control circuit not directly depending upon the internal RAS signal.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: April 13, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Junichi Okamura
  • Patent number: 5812478
    Abstract: A semiconductor memory including first, second, and third data busses, and first and second memory cell arrays arranged among the first, second, and third data busses. During operation of the semiconductor memory, a first, a second, and a third circuit selectively couple the first, second, and third data busses to a fourth and a fifth data bus. Additionally, there is provided first and second buffer circuits, which are respectively coupled to the fourth and the fifth data busses, and a sixth data bus, which is commonly coupled to the first and second buffer circuits. A control circuit is used to control the operation of the switch circuits. In preferred embodiments, the number of buffer circuits in the semiconductor memory is less than or equal to the number of memory cell arrays.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: September 22, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Junichi Okamura
  • Patent number: 5740120
    Abstract: A semiconductor memory including first, second, and third data busses, and first and second memory cell arrays arranged among the first, second, and third data busses. During operation of the semiconductor memory, a first, a second, and a third switch circuit selectively couple the first, second, and third data busses to a fourth and a fifth data bus. Additionally, there is provided first and second buffer circuits, which are respectively coupled to the fourth and the fifth data busses, and a sixth data bus, which is commonly coupled to the first and second buffer circuits. A control circuit is used to control the operation of the switch circuits. In a preferred embodiment, the semiconductor memory has an equal number of buffer circuits and memory cell arrays.
    Type: Grant
    Filed: January 4, 1996
    Date of Patent: April 14, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Junichi Okamura