Patents Assigned to NEC
  • Patent number: 7671652
    Abstract: A logic circuit is provided with a first differential transistor pair (Q1, Q2) operable in response to a data signal input thereto; a current source for supplying a current to the first differential transistor pair (Q1, Q2); a first transistor (Q5) connected between a common emitter of the first differential transistor pair (Q1, Q2) and the current source, and operable in response to a clock signal input thereto; and a first potential stabilizing circuit (30a) connected to a first junction between the common emitter of the first differential transistor pair (Q1, Q2) and a collector of the first transistor (Q5), for stabilizing a potential at said first junction.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventor: Yasushi Amamiya
  • Patent number: 7671656
    Abstract: A level shifter in which short circuit current and the increase in delay are reduced when a first power source is controlled. In a level shifter for converting a signal level of a first logic circuit to which a first power source is supplied into a signal level of a second logic circuit to which a second power source is supplied, the circuit includes a switching circuit between a GND power source terminal of a level shift core circuit and a GND power source. The switching circuit is controlled by a third logic circuit which generates a control signal under control of the first power source, and a pull-up/pull-down circuit at an output of the level shift core circuit. The pull-up and/or pull-down circuit is controlled by the third logic circuit.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventor: Masahiro Nomura
  • Patent number: 7672646
    Abstract: A hardware is used to perform an SSDT processing, thereby avoiding performance degradation than otherwise would occur due to load increase caused by a software processing, and thereby realizing a base station that can instantaneously perform a transmission control and provide a high speed site selection. In order to perform a site selection diversity power control (SSDT) for the purpose of reducing the amount of interference that would be caused by transmitting the same data to a plurality of cells or antennas during soft-handover, an encode processing part (1) is used to add a transmission control bit to the transmitted data. In response to this transmission control bit, a transmission control signal selecting circuit (206) selects a transmission control signal of destination.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventor: Hideki Ohwada
  • Patent number: 7671787
    Abstract: On adjusting a target specification data error predicted value so as to become larger on detecting maneuver of a target, the target specification data error predicted value is adjusted, in consideration of type of the maneuver and a course of the target, so as to make a direction of varying specification data large and to make a direction of constant specification data small. It is therefore possible to quickly recover a delay of the following of the varying specification data and to avoid increasing an error of the constant specification data.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: March 2, 2010
    Assignees: NEC Corporation, Nippon Avionics Co., Ltd.
    Inventors: Ken Kinoshita, Tadashi Nakamura
  • Patent number: 7672559
    Abstract: Optical waveguide device has waveguide strip-shaped in the depth direction of the drawing and protruding from peripheral portion. A core (not illustrated) is disposed inside waveguide. Wall to be cut is integrated with waveguide to form one core layer. No unevenness occurs in a cutting line of wall indicated with broken line. Accordingly, high-precision cutting is enabled by cutting wall along the cutting line.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventor: Taro Kaneko
  • Patent number: 7670841
    Abstract: The present invention provides, as a method of analyzing the C-terminal amino acid sequence of a peptide with use of reaction technique for successively releasing the C-terminal amino acids, in which undesirable side reactions, such as cleavage of a peptide bond at the middle of the peptide, can be prevented and chemical treatments therein can be carried out under widely applicable conditions in the course of successive release of the C-terminal amino acids from a peptide, such a method comprising steps of dehydrating the gel on which a target peptide that has been separated by gel electrophoresis is held in the bound state; immersing it in a mixture solution of an alkanoic acid anhydride added with a small amount of a perfluoroalkanoic acid in a dipolar aprotic solvent to re-swell the gel carrier, forming a 5-oxazolone structure, at a temperature chosen in the range of from 30° C. to 80° C.
    Type: Grant
    Filed: November 28, 2003
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventors: Kenji Miyazaki, Akira Tsugita, Kenichi Kamijo, Takuji Nabetani
  • Patent number: 7672673
    Abstract: The present invention provides a relief method of competition between a Down Link RRC message and inter-cell movement of user equipment which can continue communication even when acknowledgment of the Down Link RRC message cannot be performed. An RLC layer of the radio network controller (RNC) divides a Down Link RRC message into RLC AMD_PDU and transmits them, and gives an RLC error notice to an RRC layer from the RLC layer when a number of RLC AMD_PDU resending is exceeded because RLC ACK cannot be received from user equipment (UE). An RRC layer of the radio network controller activates a timer. When receiving CELL UPDATE within a fixed period, the RRC layer regards the RLC error as competition with inter-cell movement of the user equipment to reset the RLC layer of the radio network controller. The RRC layer of the radio network controller makes RLC RESET INDICATOR be TRUE in RRC:CELL UPDATE CONFIRM from the radio network controller so as to reset the RLC layer of the user equipment.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventor: Masahiko Kojima
  • Patent number: 7671399
    Abstract: A semiconductor storage device in which product cost is reduced includes a memory cell section (cells belonging to word lines) and a bypass section (cells belonging to bypass word lines). The memory cell section has a select gate, floating gates, a first diffusion region, a second diffusion region and a first control gate. The bypass section has the first select gate, the first diffusion region, the second diffusion region and a second control gate. The second control gate controls a channel in an area between the select gate and the first diffusion region or between the select gate and the second diffusion region. The channel of the bypass section becomes a current supply path when a cell of the memory cell section is read out.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: March 2, 2010
    Assignee: NEC Electronics Corporation
    Inventors: Naoaki Sudo, Kohji Kanamori, Kazuhiko Sanada
  • Patent number: 7672237
    Abstract: In a node having first, second, and third layers, a packet (or a cell) is mapped in the first layer. The first layer judges whether the packet (or the cell) is to be dropped at the node or to be hopped to a next node. The first layer transmits the packet to the third layer through the second layer when the first layer judges that the packet is to be dropped at the node. The first layer transmits, when the first layer judges that the packet is to be hopped to the next node, the packet to the next node by making the packet cut through the first layer.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventor: Naohiro Shimada
  • Patent number: 7672406
    Abstract: Disclosed is a clock-and-data recover circuit in which a data sampling circuit, a phase comparator, a phase controller and a phase interpolator make up a loop. The data sampling circuit samples serial input data, and the phase comparator receives an output from the data sampling circuit to detect the phase relationship between clock and the data. The phase controller outputs a phase control signal based on the result of phase comparison of the phase comparator to output a phase control signal. The phase interpolator receives a multi-phase clock composed of plural clock signals with different phases and supplies a clock signal having the phase interpolated based on the phase control signal, to the data sampling circuit. The clock and data recovery circuit further includes a second phase interpolator and a second data sampling circuit. The phase controller generates and outputs a second phase control signal to the second phase interpolator.
    Type: Grant
    Filed: January 4, 2007
    Date of Patent: March 2, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Masahiro Takeuchi
  • Patent number: 7671682
    Abstract: A variable gain power amplifier includes a power amplifying unit and a signal generating unit. The power amplifying unit includes a control terminal, and a gain of the power amplifying unit is variable by a control signal provided through the control terminal. The signal generating unit generates the control signal to be provided to the control terminal. The signal generating unit includes a switching circuit to be turned on and off by a binary signal, a constant current source that generates a constant current, and a variable current source that generates a variable current. Also, the signal generating unit generates, when the switching circuit is on, a control signal of a magnitude that turns on the power amplifying unit and depends on a magnitude of a sum of the constant current and the variable current. When the switching circuit is off, the signal generating unit generates a control signal of a magnitude that turns off the power amplifying unit.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: March 2, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Hidehiko Kuroda
  • Patent number: 7673162
    Abstract: An information processing terminal includes a WOL monitoring unit for monitoring whether or not a particular packet for indicating resumption of operation from a suspended state is received, a resume processing unit for resuming the operation from the suspended state, a factor monitoring unit for recording a factor of the resumption to a memory, a cancel monitoring unit for monitoring whether or not a cancel signal to a communication request received after the resumption is received, and a suspend processing unit for switching the operation to the suspended state when the factor of the resumption is reception of the particular packet as well as the cancel signal is received after the resumption. With this arrangement, power consumption of the information processing terminal can be suppressed.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: March 2, 2010
    Assignee: NEC Infrontia Corporation
    Inventor: Youhei Nishi
  • Patent number: 7672305
    Abstract: Port input sections generate, when the head flits of a packet are stored in the first and second registers, first and second mediation request signals destined for a desired request destination, and further generate a first notification signal used to notify the presence or absence of the first mediation request signal destined for any request destination. Upon reception of a mediation result signal, the port input sections output the flit from the first register and sequentially forward flits to be stored in the first register and the second register, and the port output sections sequentially output the flit outputted from the first register of any one of the port input sections to the node.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventor: Yoshihisa Yamada
  • Patent number: 7671477
    Abstract: A device comprises a plurality of first electrodes which are arranged on a surface of a substrate at predetermined space, a component which has an elasticity and a longitudinal axis, a plurality of conductors which are applied to a surface of said component at predetermined space, and each of which are connected to a corresponding one of said first electrodes, and a plurality of second electrodes which are arranged on a surface of a electronic component at predetermined space, and each of which are connected to a corresponding one of said conductors.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventor: Hironobu Ikeda
  • Patent number: 7671829
    Abstract: A driving method for a color liquid crystal display which drives the color liquid crystal display based on a video red signal, a video green signal and a video blue signal by independently applying a gamma compensation to a clamped video red signal, a clamped video green signal and a clamped video blue signal in gamma compensating circuits in order to make suitable to a red transmittance characteristic, a green transmittance characteristic and a blue transmittance characteristic. With this operation, it is possible to carry out an optimal gamma compensation suitable to a characteristic of the color liquid crystal display and to remove a gradation batter occurring in a specific color.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: March 2, 2010
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Noriaki Sugawara, Kouichi Koga
  • Patent number: 7669829
    Abstract: The present invention provides a cradle device designed to be connected to a portable terminal which is provided with a connector at an upper part thereof for external electrical connection and with grooves formed at four corners of the outline to be held by means of the grooves. The cradle device has a structure to allow the portable terminal to slide so that the grooves formed in the connector portion and the portable terminal body can be securely engaged. The cradle device also has a rotate and slide mechanism in the face thereof opposing the connector, and has a structure to ensure reliable engagement with the grooves formed in the portable terminal body. Thus, the portable terminal cradle device is easy to carry, small-sized and superior in mechanical reliability, equally to the base unit, or the portable terminal.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventor: Toshinobu Ogatsu
  • Patent number: 7672460
    Abstract: Each participant apparatus (103) encrypts a plaintext by using a secret key of secret key cryptography, encrypts the encryption key by a public key, and sends the plaintext and public key to a substitution/decryption apparatus (112). With this processing, the limitation on the length of a ciphertext to be processed can be eliminated. In this invention, a verifiable proof text using a public key by each substitution/decryption apparatus is verified by a verification apparatus (109) by using the public key. If one of a plurality of organizations to decrypt and shuffle ciphertexts has not correctly executed the operation, a third party can specify it and prove that the specified organization is unauthorized.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventors: Jun Furukawa, Kazue Sako
  • Publication number: 20100044741
    Abstract: A fighting device of the present invention includes light emitting unit 20 having a light emitting element installed on a board, and body 11 having light emitting unit 20 mounted thereon. Body 11 has graphite having anisotropic heat conductivity, and the graphite has inner wall 11c in thermal contact with light emitting unit 20. The anisotropy of the graphite has direction Z having a first heat conductivity and direction X1 having a second heat conductivity that is higher than the first heat conductivity. Inner wall 11c of the graphite to which heat generated from light emitting unit 20 is transferred is formed to intersect with direction X1.
    Type: Application
    Filed: May 8, 2008
    Publication date: February 25, 2010
    Applicant: NEC LIGHTING, LTD.
    Inventor: Katsuyuki OKIMURA
  • Publication number: 20100046416
    Abstract: To suppress communication delay and data loss caused by the radio type of a mobile terminal and the radio communication band when a communication packet is sent to the mobile terminal in a mobile IP system. A mobile IP control system includes: a radio base station (40A) which provides a radio connection link to a mobile terminal (50); a home agent (20) which transfers a communication packet transmitted from a partner terminal (60), to the mobile terminal (50); and a foreign agent (30A) which relays mutual communication between the foreign agent (30A) and the radio base station (40A). The foreign agent (30A) notifies the home agent (20) of the communication band of the radio communication performed between the radio base station (40A) and the mobile terminal (50). The home agent (20) performs band control for packet transmission to the mobile terminal (50) in accordance with the notified communication band.
    Type: Application
    Filed: January 16, 2008
    Publication date: February 25, 2010
    Applicant: NEC CORPORATION
    Inventor: Yasuhiro Mizukoshi
  • Publication number: 20100044786
    Abstract: A semiconductor device includes: a semiconductor layer of a first conductivity type; a base region of a second conductivity type formed on a surface of the semiconductor layer of the first conductivity type; a plurality of first column regions of the second conductivity type formed in a matrix fashion in the semiconductor layer when seen in a plan view; a trench gate formed in a grid fashion in the semiconductor layer so that each of the first column regions is surrounded by the trench gate when seen in a plan view, the trench gate penetrating through the base region to reach the semiconductor layer of the first conductivity type; and a plurality of second column regions of the second conductivity type selectively formed below each intersection of the grid of the trench gate except line section of the trench gate.
    Type: Application
    Filed: August 17, 2009
    Publication date: February 25, 2010
    Applicant: NEC ELECTRONICS CORPORATION
    Inventors: HISAO INOMATA, YOSHINAO MIURA