Mitsubishi Electric

About: Mitsubishi Electric is a company organization based out in Ratingen, Germany. It is known for research contribution in the topics: Signal & Voltage. The organization has 23024 authors who have published 27591 publications receiving 255671 citations. The organization is also known as: Mitsubishi Electric Corporation & Mitsubishi Denki K.K..

Successful Development of 1.2 kV 4H-SiC MOSFETs with the Very Low On-Resistance of 5 mΩcm2

Abstract: 4H-SiC MOSFETs comprised of a miniaturized unit cell structure were fabricated. The epilayer channel configuration was employed to effectively improve the MOSFET electrical characteristics. A specific on-resistance of 5 mOmegacm2 with a stable avalanche breakdown of 1.35 kV was successfully recorded. Temperature dependence of the Ron,sp examined and the Ron,sp exhibited still low value of 8.5 mOmegacm2 at 150 degC . The SiC-MOSFETs were put together with SiC-SBDs to realize prototype SiC power modules. A switching energy loss was significantly reduced by employing the SiC module in comparison with a Si-IGBT/Si-FWD module. A three-phase inverter circuit consisted of the SiC module was assembled and stably drove a 3.7 kW/400 V induction motor

System for designing a virtual environment utilizing locales

Abstract: A system for virtual environments in which graphical objects are depicted in a space to achieve the required high accuracy regardless of location through establishing locales or subdivisions of the global coordinate system and establishing an origin for each locale, such that the specification of position and movement of a graphical object in the locale can be made with greater precision than using a global coordinate system, thus eliminating the need for high-precision floating point processors or emulation. The system permits designers of virtual environments to work independently on their locales, with overlap being controlled through specifying distance between locale origins as well as relative orientation between the locales. The system also permits ignoring information from non-relevant distant locales to, minimize processing and network bandwidth requirements.

Communication system, management apparatus, communication apparatus and computer program

Abstract: In a ring type network, a master node sends a measurement packet to a slave node in the backward direction and the forward direction, receives the measurement packet which has been circulated among a plurality of slave nodes, stores a received time of the backward direction measurement packet and a sending time of the forward direction measurement packet according to time-keeping of an internal clock, sends a measurement result notifying packet showing a sending time and a received time of the measurement packet to the slave node; each slave node receives the backward direction measurement packet and the forward direction measurement packet, sends the received measurement packet to the next node, stores the received time of the backward direction measurement packet and the sending time of the forward direction measurement packet according to the time-keeping of the internal clock, receives a measurement result notifying packet, calculates a time correction value using the sending time and the received time of the measurement packet shown in the measurement result notifying packet and the sending time and the received time of the measurement packet stored, and corrects a time of the internal clock using the calculated time correction value.

Synchronous semiconductor memory device operable in a plurality of data write operation modes

Abstract: A synchronous semiconductor memory device can achieve either of a pipelined mode and a prefetch mode with one chip. In accordance with CAS (column address strobe) latency 4 instructing signal MCL4 stored in a mode register, a sequence of generation of control signals from a control signal generating circuit is set to either the pipelined mode or the prefetch mode. A mode switching circuit merely switches reset timings of a write buffer in accordance with a CAS latency. Therefore, the internal data write mode can be easily switched in accordance with an operation environment, and the synchronous semiconductor memory device can implement multiple data write modes with one chip.