Hitachi, Ltd.

Renesas Technology Corp.

Renesas Electronics Corporation

Murata Manufacturing Co., Ltd.

Ttpcom Limited

Hitachi Automotive Systems, Ltd.

Other

Hitachi-Kokusai Electric Inc.

The Technology Partnership, Plc.

Hitachi Device Engineering Co., Ltd.

Renesas Mobile Corporation

Ttp Com Limited

Tipcom Limited

Htachi, Ltd.

Ttp Communications Limited

Taizo Yamawaki

Satoshi Tanaka

Kazuo Watanabe

Takayuki Tsutsui

Kiichiro Takenaka

Takashi Oshima

Yukinori Akamine

Kazuaki Hori

Masumi Kasahara

Masaru Kokubo

Kumiko Takikawa

Masao Hotta

Hiroaki Matsui

Tomio Furuya

Masahiro Ito

Hiroki Yamashita

Tomonori Tanoue

Teppei Hirotsu

Manabu Nakamura

Akira Kuriyama

Robert Astle Henshaw

Norio Hayashi

Akio Yamamoto

Takahiro Nakamura

Shun Imai

Koji Maeda

Julian Hildersley

Hiroshi Kamizuma

Yoshiaki Harasawa

Ming Liu

Tomomi Takahashi

Ryosuke Ishida

Toyohiko Hongo

Yasushi Sugiyama

Hirofumi Kurimoto

Takayasu Norimatsu

Sungwoo Cha

Takefumi Endo

Yohei Nakamura

Takashi Kawamoto

May Suzuki

Atsushi Arata

Yasuyuki Okuma

Kenichi Hoshino

Hisayoshi Kajiwara

Ryusuke Sahara

Steve Williams

Takuya Mayuzumi

Mitsuhiko Watanabe

Naoki Hongo

Yoichi Okubo

Satoru Yamamoto

Goichi Ono

Shinya Kajiyama

Hidehiro Toyoda

Kazuhiko Hikasa

Patrick Wurm

Yasuhiro Takeda

Taizo Ito

Tomohiko Yano

Ryoichi Takano

Masamichi Tanabe

Junya Dosaka

Akira Maeki

Koichi Yahagi

Takao Kihara

Kenji Toyota

Atsutake Kosuge

Bob Henshaw

A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.

High-frequency signal processing apparatus and wireless communication apparatus

A neural network circuit having a plurality of analog-to-digital multipliers generates an analog product-sum voltage corresponding to the sum of charge signals of each of the analog-to-digital multipliers.

Neural network circuit

A power supply apparatus that can realize ripple reduction, and an electronic control unit including the power supply apparatus are provided. In view of this, a PWM controller generates a PWM signal, and a PFM controller generates a PFM signal having a phase independent of the PWM signal. A level-fixed period generating circuit sets a level-fixed period having a start timing at a selection timing set to an edge of the PFM signal. A mode selecting circuit selects, at the selection timing and as a switching control signal, the PWM signal instead of the PFM signal, and controls a logic level of the switching control signal in the level-fixed period starting at the selection timing, such that the logic level becomes a fixed logic level.

Power supply apparatus and electronic control unit

A load drive system for driving a load supplied with power from a power line includes a control unit which controls switching between the power line and the load and a communication unit which communicates using voltage and current of the power line. When performing the switching, the control unit controls, based on a width of a transition period of the power-line current, the transition period being attributable to the switching, timing of the switching so as to move the transition period away from a center of a period corresponding to a symbol communicated by the communication unit.

Load drive system and load drive method

A correct commutation is realized even if a communication error occurs due to a change in an actuator drive current. An electronic control unit that includes a communication section outputting a control signal and that can transmit the control signal to an actuator connected to the electronic control unit via a power line, includes an actuator operation detection section. When the actuator operation detection section detects an actuator operation, the communication section retransmits the control signal at timing of detecting the actuator operation.

Electronic control apparatus provided with power line communication function, actuator, electronic control system, and automobile using same

Provided is a sensor terminal including a sensor element, the sensor terminal further including: an ADC that converts an analog signal output from a sensor element into a digital signal; a storage device in which a plurality of first storage setting numbers being information for controlling the ADC and a plurality of pieces of first characteristic information including description of operation of the ADC are stored in association with each other; and a communication device that receives a first reception setting number from the outside of the sensor terminal, and transmits the first characteristic information corresponding to the first storage setting number that coincides with the first reception setting number, to the outside of the sensor terminal.

Sensor terminal and sensor system

A power line communication apparatus includes a drive block including an actuator control circuit and a drive circuit and a communication block. The actuator control circuit generates a control pulse for controlling an actuator, and controls a transition timing of the control pulse during an operation period set within a communication cycle by a communication clock. The drive circuit controls a driving current of the actuator supplied from a DC power source through a power line based on the control pulse in which the transition timing is controlled. The communication block generates the communication clock, and modulates a current flowing through the power line in response to data to be transmitted during a signal transmission period different from the operation period, set within the communication cycle.

Power line communication apparatus and electronic control apparatus including power line communication apparatus

To achieve, in a load drive device including an H-bridge circuit, miniaturization of a capacitor or/and the constituent elements of the H-bridge circuit (e.g., reduction in volume) with circuit elements, for example, switching elements included in the H-bridge circuit, being inhibited from breaking down or destroying even in a case where a load is overloaded. The invention is disclosed in which, as a solution to the achievement, first and second modes are provided as a switching mode for the switching elementsandand switching is appropriately performed between the first and second modes.

Load drive device

A step-up/down power supply, in which a circuit area is small, includes a step-down unit that generates an output voltage lower than an input voltage by turning on or off a step-down switch in which the input voltage of the step-up/down power supply is applied, and a step-up unit that generates an output voltage higher than the input voltage by turning on or off a step-up switch in which a ground is applied. A step-down gate voltage control circuit controls a gate voltage of the step-down switch and includes a gate voltage generating circuit that generates a first voltage and a second voltage for turning on the step-down switch. A gate voltage switching circuit switches between the first voltage and the second voltage, and the gate voltage generating circuit includes a first voltage source that generates the first voltage and a second voltage source that generates the second voltage.

Step-up/down power supply and power supply circuit

Growing community of inventors

Tokyo, Japan

Taizo Yamawaki