Hitachi, Ltd.

Other

Renesas Technology Corp.

Hitachi Ulsi Systems Co., Ltd.

Hitachi Vlsi Engineering Corp.

Hitachi Car Engineering Co., Ltd.

Research Development Corporation of Japan

Hitachi, Ltd. and Hitachi Car Engineering Co., Ltd.

Hitachi Vsli Engineering Corp.

Takashi Ito

Naoki Yashiki

Kenichi Kuroda

Kiyoshi Matsubara

Shiro Baba

Kazuyoshi Shiba

Masanao Sato

Masaaki Terasawa

Hirofumi Mukai

Ryoichi Kobayashi

Katsuaki Fukatsu

Noboru Sugiura

Kenzo Funatsu

Isamu Kobayashi

Hitoshi Akamine

Kenichi Ishibashi

Akira Usui

Yuichi Kashimura

Hiroshi Onuki

Hiroshi Masuhara

Katsumi Iwata

Hiroshi Watanabe

Takanori Higashihara

Shun Imai

Akihiko Maruyama

Tsuyoshi Asahi

Satoshi Arai

Hitoshi Ichikawa

Chiaki Kubomura

Keiji Kuboyama

Fuminori Iwaki

Tetuo Fujihara

Naoto Tamai

Naoki Mita

Yutaka Kanai

Hidetoshi Tashiro

Yoshishige Kato

Hiroyuki Miura

Keiji Kubuyama

Chiaki Kubumura

A semiconductor device having an electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.

Data line disturbance free memory block divided flash memory and microcomputer having flash memory therein

In a disk stand device and a disk storage device for use in compact disks, mini disks and floppy disks, an array of grooves () are provided on an upper surface of a pedestal () at predetermined intervals (L). When one end of a disk () is inserted into the groove () upon accommodating the disks (), a plurality of disks () are positioned to overlap with the predetermined intervals (L) therebetween. A title labelled on the disk () can be visually recognized through the intervals (L) of the neighboring disks (). Upon reusing the disk (), the disk () can be taken out of the groove () quicky to improve an efficiency at offices in which electronic computers are employed.

Disk standing device and storage device for the disk standing device

The invention realizes a wireless communication module that is capable of transmitting the fundamental wave with low loss and reducing the double higher harmonic wave level to a desired level or lower as the whole module. The invention provides a front end module to be used for a wireless communication system such as cellular phone in which at least an output power amplifier, a matching circuit, and a low-pass filter are mounted on one insulating substrate and these circuits are connected in the above-mentioned order, wherein the relative phase of the double higher harmonic wave impedance between phases in view of the matching circuit side and the low-pass filter side from the connection point between the matching circuit and the low-pass filter is set in a range of 180 degrees &#xb1;90 degrees.

Electronic apparatus and design method

Method for manufacturing a printed board on which a semiconductor device having two modes is mounted

Microcomputer including a flash memory that is two-way programmable

An ignition apparatus for an internal combustion engine has an arrangement comprising a power part and a control part which are accumulated in a one-chip in an IGBT monolithic silicon substrate. The control circuit part has current limiting function of prevent the flowing of any current which is above a predetermined value as well as function of detecting malfunction heat generation by which a primary electric current is blocked compulsorily. The secondary voltage of an ignition coil is generated repeatedly below a plug discharge voltage so as not to generate spark discharge in the sparking plug when the electric current compulsory blocking is carried out, and energy charged in the ignition coil is emitted or discharged. With this arrangement, the one-chip ignition apparatus with high reliability can be achieved.

Ignition apparatus for internal combustion engine and one-chip semiconductor for internal combustion engine igniting

A main IGBT conducts or blocks a primary current flowing through the ignition coil in response to an input ignition control signal to generate a high voltage on the secondary side of the ignition coil. The main IGBT and a current limiter circuit are integrated in a monolithic silicon substrate of an insulating gate bipolar power transistor. The main IGBT has a collector and agate connected through a depletion IGBT forming part of a constant current circuit, and a resistor. When a voltage generated across the resistor becomes equal to or higher than a zener voltage, a zener diode leads this current to an emitter of the main IGBT.

Ignition system for internal combustion engine

A one-chip integration circuit including a power part and a control part integrated within an IGBT monolithic silicon substrate is disclosed. The control circuit part comprises a current limiting circuit for limiting a current so that it does not flow over a set-up value, a reference pulse generating circuit for detecting that an ignition control signal is inputted over a predetermined period of time, a digital timer made up by a digital counter, a latch circuit for dropping the gate voltage of the IGBT by latching due to the digital timer output signal and carrying out resetting when the ignition control signal is off, an input circuit having a potential comparison circuit in its input stage, in which the operation voltage for ignition control signal has a threshold value and a hysterisis, and an input protection circuit having a Zener diode and a resistor connected in parallel therewith for protecting the element from disturbance surges. A one-chip igniter with high operative stability and high reliability can be provided.

Ignition device for an internal combustion engine

A semiconductor device having and electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.

Growing community of inventors

Kokubunji, Japan

Takashi Ito