Nippon Telegraph and Telephone Corporation

Oki Electric Industry Co., Ltd.

International Business Machines Corporation

Olympus Corporation

Subaru Corporation

The Bank of Tokyo-Mitsubishi Ufj, Ltd.

Ntt Electronics Corporation

Naoki Miura

Hideyuki Nosaka

Hiroyuki Fukuyama

Kenji Tanaka

Nobuyuki Tanaka

Yuki Arikawa

Satoshi Shigematsu

Kenji Kawai

Tomoaki Kawamura

Masumi Yamashita

Il-Min Yi

Akira Hasegawa

Takeshi Sakamoto

Hironobu Takizawa

Yasushige Ishihara

Etsushi Yamazaki

Seiji Okamoto

Kazuhiro Gono

Hiroyuki Uzawa

Tsuyoshi Ito

Naoki Matsumoto

Katsuichi Imaizumi

Mamoru Kaneko

Kengo Horikoshi

Mitsuteru Yoshida

Shunya Akimoto

Katsuya Ono

Hideyuki Takaoka

Yuta Ukon

Junichi Nozawa

Hiroaki Katsurai

Junichi Kato

Masami Urano

Masaru Katayama

Shinsuke Nakano

Namiko Ikeda

Tomohiro Takamuku

Yasuharu Onuma

Mamoru Nakanishi

Saki Hatta

Tianyu Xie

Shoko Ohteru

Sadayuki Yasuda

Manabu Ishikawa

Daiki Kita

Eiichi Hosoya

Takeshi Sakemoto

Kosuke Furuta

Yoshimichi Sasaki

Yoshiki Isobe

A data transfer device transfers a received packet. If the transfer destination of the received packet is a data processing device under control, the data transfer device (confirms the state of a shared bus, and if the shared bus is usable, transfers the packet to the data processing device of the transfer destination via the shared bus, gives the use right of the shared bus to one of the data processing devices in response to communication requirements from the data processing devices, and receives, via the shared bus, a packet from the data processing device given the use right.

Data transfer device, data processing device and data processing method

A clock generation circuit includes a mode-locked laser that generates an optical pulse, a photodiode that photoelectrically converts the optical pulse generated by the mode-locked laser, and a filter that attenuates at least one of a DC component and a harmonic component of the mode-locked laser included in an electric signal output from the photodiode.

Clock generation circuit

A negative feedback inductor and a gate inductor are formed in different wiring layers of a substrate so as to be at least partially overlapped with each other in a plan view. When the lower wiring layer is thinner and the upper wiring layer is thicker, the negative feedback inductor Lc is formed in the lower wiring layer that is thinner.

Transimpedance amplifier

Provided is a track-and-hold circuit capable of reducing the power consumption of a differential amplifier circuit while preserving the broadband nature (without narrowing the bandwidth). In the track-and-hold circuitincluding a differential amplifier circuit, a switch circuit, and a hold capacitor C, the differential amplifier circuitincludes a first resistor Rhaving one end connected to a collector electrode of a first transistor Qconstituting a differential pair, a second resistor Rhaving one end connected to the collector electrode of a second transistor Qconstituting the differential pair, and a third resistor Rto which the other end of the first resistor Rand the other end of the second resistor Rare connected and which is connected between the other ends and a power supply V.

Track and hold circuit

An amplifier output from an amplifier to an SR latch is used as a feedback signal through a buffer. An adder having a combination of an addition unit and an xh block is provided within the amplifier and transmits a feedback signal (analog signal) generated from the feedback signal FBD (digital signal) by the xh block to the addition unit and adds it to an output from a latch block. In the amplifier, the operation for adding the output from the latch block and the feedback signal occurs during a latch operation in the latch block.

Decision feedback equalizer

An embodiment target time comparison circuit corresponding to a target approximate voltage range among 2time comparison circuits in a second comparison circuit compares a comparison operation time difference included in voltage comparison results regarding two adjacent approximate voltage ranges that are vertically adjacent to the target approximate voltage range with 2reference times corresponding to 2specific voltage ranges and generates a target binary code of L bits indicating a target specific voltage range including the held voltage from the obtained time comparison results.

Analog-digital converter

A track-and-hold circuit with a high sampling rate and reduced power consumption is provided. A track-and-hold circuit performing switching between a track mode in which a data signal that is equivalent to an input data signal is output and a hold mode in which a data signal which is input at a time of switching from the track mode to the hold mode is held and output, by using a clock signal, such that only the data signal in the hold mode is output, the track-and-hold circuit including: two sampling circuits configured to be connected in parallel to an input of the data signal and receive an in-phase data signal; a clock circuit configured to input a clock signal, which has a phase opposite to a phase of a clock signal input to one of the two sampling circuits, to the other of the two sampling circuits; and a multiplexer circuit configured to select and output a data output of either one of the two sampling circuits that is in the hold mode, by using the clock signal.

Track-and-hold circuit

A freezing diagnosing device to be installed in an engine includes an ambient temperature sensor, a liquid temperature sensor, and a freezing determination unit. The ambient temperature sensor detects an ambient temperature. The liquid temperature sensor detects the temperature of a liquid held in the engine. The freezing determination unit determines that a freezing state of a pipe coupled to a pressure sensor in the engine is established when one or both of a first condition and a second condition are satisfied. The first condition is that the ambient temperature detected by the ambient temperature sensor is equal to or less than a first threshold. The second condition is that the temperature of the liquid detected by the liquid temperature sensor is equal to or less than a second threshold.

Freezing diagnosing device and engine control apparatus

An EGR malfunction detection system includes an EGR valve configured to open and close an exhaust recirculation path for recirculating an exhaust gas from an exhaust channel to an intake channel of an engine, a measurement unit configured to measure an intake pressure inside the intake channel, a valve controller configured to control the EGR valve, and a malfunction detector configured to detect an anomaly in the exhaust recirculation path in accordance with a measurement unit output and a valve controller output. The malfunction detector determines whether the EGR valve is stuck in accordance with the intake pressures measured when the EGR valve is controlled to open and close. If the EGR valve is stuck, the malfunction detector determines whether the EGR valve is stuck in an open state, stuck in a closed state, or stuck in an intermediate state by comparing the measured pressure with predetermined thresholds.

EGR malfunction detection system

A coherent optical reception device includes a local oscillation laser that supplies laser light, a coherent optical reception front-end unit that receives a multi-level modulated optical signal, demodulates the optical signal on the basis of the laser light, and converts a demodulated optical signal into an electrical analog signal, an analog-to-digital converter that converts the analog signal into a digital signal, a compensation unit that compensates for an influence of dispersion due to a wavelength or a polarized wave of the optical signal and recovers a carrier phase of the digital signal, a constellation distortion compensation unit that compensates for constellation distortion of the multi-level modulation included in the digital signal in which an influence of dispersion is compensated for by the compensation unit, and an error correction decoding unit that performs error correction of the digital signal in which the constellation distortion is compensated for.

Coherent optical reception device

A selection and distribution circuit () is provided between N optical transceivers () and one PON control circuit (). The selection and distribution circuit () selects the optical transceiver () corresponding to an upstream frame that time-divisionally arrives, thereby transferring the upstream frame opto-electrically converted by the transceiver () to the PON control circuit () and distributing a downstream frame from the PON control circuit () to each optical transceiver (). A power supply control circuit () stops power supply to at least one of one of optical transceivers () that are not used to transfer the frame of the optical transceivers () and a circuit that is not used to transfer the frame in the selection and distribution circuit (). This can reduce the system cost per ONU in the optical transmission system.

Station-side device and optical transmission system

An OLT () is formed by N optical transceivers (), one PON control circuit (), and one selection and distribution circuit (). An optical transceiver selection control signal (SC) is transferred from the PON control circuit () to the selection and distribution circuit (). The optical transceiver selection control signal (SC) indicates the timing of a discovery window, the timing of a grant, and a logical link identification number of a registered ONU assigned to the grant (a logical link identification number for a logical link with the registered ONU). The selection and distribution circuit () selects one optical transceiver (-(s is an integer falling within a range of 0 to N&#x2212;1)) from the optical transceivers (-to-N) based on the optical transceiver selection control signal (SC) from the PON control circuit ().

Station-side apparatus in optical transmission system, optical transmission system, and optical transmission method

A child station () of a communication system performs communication while synchronizing the reference time of a parent station () with the local time (RT) of the child station (). When the child station () is switched from a normal mode to a power saving mode in accordance with a mode change instruction from the parent station (), correction is performed for one or both of a stop period in which the apparatus of the child station () is stopped and a non-stop period in the power saving mode using an error (&#x394;t) generated during the time between the reference time of the parent station () and the local time (RT) of the child station (). This makes it possible to synchronize the parent station () with the child station () and reliably and efficiently transfer a control frame (CF) from the parent station () to the child station ().

Communication system, communication method, and child station of communication system

A service processing apparatus that is realized by a computer is provided. A service ID generating/adding component of the service processing apparatus generates a service ID including a call origin ID and a call destination ID, in each of which an ID element is set, and adds the generated service ID to a service request transmitted when no upper service processing apparatus to the own apparatus exists, and, when an upper service processing apparatus to the own apparatus exists, generates a service ID including a call origin ID in which is set an ID element set as the call destination ID in a service ID added to a service request received from the upper service processing apparatus and a call destination ID in which is set an ID element and adds the generated service ID to the service request.

Service processing apparatus, system, and recording medium

An in-vivo information measurement apparatus having an insertion part; a light projection unit, provided at a tip of the insertion part, irradiates an examination site with intensity-modulated light which is intensity modulated at a first frequency; a light receiving unit receives return light from the examination site; an optical detector detects return light; an in-vivo information calculation unit calculates in-vivo information for the examination site based on a phase shift between a modulated detection signal, a detection signal from the optical detector is modulated at a second frequency, and a reference signal having a difference frequency equal to the difference between the first frequency and the second frequency; and a position moving mechanism moves at least one of a position at which the intensity-modulated light is emitted by the light projection unit and the position at which the return light is incident on the light receiving unit.

In-vivo information measurement apparatus

Growing community of inventors

Tokyo, Japan

Naoki Miura