Renesas Electronics Corporation

Isuzu Motors Limited

Mitsubishi Electric Corporation

Yahoo Japan Corporation

Mitsubishi Heavy Industries Engineering, Ltd.

Isuzu Motors Limi Ted

Keisuke Kimura

Hideo Nakane

Takaya Yamamoto

Yuichi Okuda

Tatsuji Matsuura

Takashi Oshima

Akira Yamashita

Ryuichi Ujiie

Wataru Saito

Daisuke Kobayashi

Masumi Kasahara

Yasushi Nakayama

Yukio Nakashima

Takayoshi Miki

Yoshiko Tamada

Hideyuki Tajima

Shota Morisaki

Tatsuaki Suzuki

Kenta Uchida

Kensuke Takada

Chiemi Taki

Tomonobu Mihara

Kenta Masumori

Fujio Shinoki

Satoshi Kawamoto

Oshima Takashi

A parallel driving device that drives parallel-connected semiconductor elements includes a control unit and a gate driving circuit. The control unit detects a temperature difference between the semiconductor elements on the basis of detected values by temperature sensors that detect temperatures of the individual semiconductor elements. The control unit generates a control signal for changing the timing at which to turn on a first semiconductor element specified from the semiconductor elements on the basis of the temperature difference. The gate driving circuit generates a first driving signal for driving the semiconductor elements, and generates a second driving signal that is the first driving signal delayed on the basis of the control signal, and applies the second driving signal to the first semiconductor element.

Parallel driving device and power conversion device

The present invention provides a current detection circuit, semiconductor device, and a semiconductor system suitable for improving a current sensing accuracy. According to one embodiment, the current detection circuitcomprises a sense transistor Trthrough which a first sense current proportional to the current flowing through the drive transistor MNflows, an operational amplifier AMPfor amplifying the potential difference of the voltage of the external output terminal OUT and the source voltage of the sense transistor Trfor outputting the first sense current, a transistor Trprovided in series with the sense transistor Trand to which the output voltage of the operational amplifier AMPis applied to the gate, and a switch SWprovided between the external output terminal OUT and the source of the sense transistor Trand turned on when the drive transistor MNis turned off.

Current detection circuit, semiconductor device, and semiconductor system

A current detection circuit, a semiconductor device and a semiconductor system which are capable of improving current detection accuracy are provided. According to one embodiment of the invention, a current detection circuit includes a resistive element to convert an input current supplied from outside into an input voltage, a constant-current source, a resistive element to convert an output current of the constant-current source into a reference voltage, and an AD converter to AD-convert the input voltage using the reference voltage.

Current detection circuit, semiconductor device and semiconductor system

A vehicle operating device includes a portable display unit configured to display a state of a vehicle, a portable input unit configured to receive operation information of the vehicle input thereto on the basis of a displayed content by the display unit, a first information processing unit configured to process first information among input operation information, a second information processing unit configured to process second information, which is different from the first information, among the input operation information, an interlock system configured to enable only the first information to be processed in an operating state and enable the first information and the second information to be processed in a released state, and a portable wireless output unit configured to output an operation signal of the vehicle based only on the first information processed in the operating state.

Vehicle operating device, and vehicle

A semiconductor device has a drive transistor coupled to a load and a current detection circuit. The current detection circuit includes: an operational amplifier amplifying a potential difference between voltage of a first terminal and voltage of a second terminal; a sense transistor passing sense current between the first terminal and the drive transistor; a voltage supply circuit having a first current source and supplying voltage higher than voltage supplied to the grounding voltage terminal to the second terminal; a third terminal outputting current based on the sense current; a second current source coupled between the third terminal and the grounding voltage terminal; and a current source control circuit controlling current of the first and second current sources. Detection current detected by the current detection circuit is current obtained by subtracting the current of the second current source from the current based on the sense current.

Semiconductor device, current detecting method, and load drive system

A display control device including: an acquiring unit configured to acquire location information items representing locations of each of a plurality of vehicles and a plurality of status information items representing statuses of each of the plurality of vehicles, the plurality of vehicles being registered in advance in association with a user using a user terminal; a setting receiving unit configured to receive a display condition set by the user; and a display control unit configured to display a map image on the user terminal such that an icon image representing a vehicle whose status information item satisfies the display condition is positioned at the center of the map image and a position of the icon image of the vehicle in the map image corresponds to the location of the vehicle represented by the location information item.

Display control device, display control method, and display control system

An operation information management device including: an acquiring unit configured to acquire operation information items of each of a plurality of vehicles; an evaluating unit configured to make evaluations of drivers respectively associated with each of the plurality of vehicles, the evaluations being made based on the operation information items; a determining unit configured to determine a ranking of one or more of the drivers associated with each of one or more vehicles of the plurality of vehicles which are classified into the same type of vehicle, the determining of the ranking being performed based on the evaluations of the one or more drivers; and a display control unit configured to control a display unit such that the display unit displays the ranking of the one or more drivers determined by the determining unit.

Operation information management device, operation information management method, and operation information management system

An operation management device including: a display control unit configured to display a map image on a user terminal; a storage configured to store a setting region, the setting region being specified as a polygonal shape which is formed by connecting three or more points set by a user of the user terminal on the map image displayed on the user terminal; an acquisition unit configured to acquire position information that indicates a position of a vehicle registered in advance, and a notification unit configured to notify the user terminal of a determination result of whether the position indicated by the position information is included in the setting region.

Operation management device, operation management method and operation management system

An operation management device including: a setting information acquisition unit configured to acquire selected vehicle information set in a user terminal and indicating a selected vehicle selected from a plurality of vehicles; a vehicle information acquisition unit configured to acquire position information and time information at predetermined time intervals, the position information indicating positions of each of the plurality of vehicles, and the time information indicating time at which the position information is acquired, and a display control unit configured to display, on the user terminal, a map image and a position image that is overlapped on the map image, the position image indicating a plurality of positions indicated by the position information corresponding to the selected vehicle, and the position image being displayed in a mode that is determined based on the time indicated by time information.

The present invention provides a semiconductor device and a failure detection method capable of detecting an excessive variation among elements that constitute an analog circuit as a failure. According to an embodiment, a semiconductor deviceincludes: an AD converter; a digital assist circuitthat corrects an error of a digital signal Do corresponding to an analog signal Ain processed by the AD converter; and a failure detection circuitthat detects whether the AD converterhas a failure based on a correction amount by the digital assist circuit. The semiconductor deviceis therefore able to detect the excessive variation among the elements that constitute the AD converteras a failure.

Semiconductor device and failure detection method

An analog-to-digital converter circuit having a simple design and capable of preventing an increase in surface area and other problems. An analog-to-digital converter circuit for converting an analog input signal to a digital quantity includes an analog-to-digital converter unit that converts analog input signals to pre-correction digital values, and a corrector unit that digitally corrects the pre-connection digital values output from the analog-to-digital converter unit. The corrector unit includes a weighting coefficient multiplier unit that outputs a post-correction digital value obtained by multiplying the weighting coefficients provided for each bit by each bit of the pre-correction digital value output from the A/D converter unit and summing them, and a weighting coefficient search unit that searches for weighting coefficients so as to minimize an error signal generated based on the post-correction digital value and an approximate value for the post-correction digital value.

A/D converter circuit and semiconductor integrated circuit

According to one aspect of an embodiment, an information display device includes a display unit that displays first content in a display region. The information display device includes a detection unit configured to detect a physical state of a terminal device. The information display device includes a display control unit configured to direct the display unit to display second new content in the display region while changing a display mode of the first content, on the basis of the detection result of the detection unit.

Information display device, distribution device, information display method, and non-transitory computer readable storage medium

A semiconductor device according to an aspect of the invention relates to an AD converter that converts a signal level of an analog signal into a digital value by using a comparator, and determines an amount of adjustment of an offset voltage of the comparator based on an offset determination result of the comparator obtained immediately after a least significant bit (LSB) of a digital value output as a conversion result is converted.

Growing community of inventors

Tokyo, Japan

Keisuke Kimura