Assignee: Oki Electric Industry Co., Ltd.

Location: JP
No. of patents: 88

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Number	Title	Issue Date
8058686	Semiconductor device including a columnar intermediate region and manufacturing method thereof A semiconductor device includes field effect transistors, each having a semiconductor layer formed on a major surface of a semiconductor substrate, a base region formed in a surface layer portion of a semiconductor layer, a source region formed in a surface layer po...	11/15/2011
7446625	Narrow impedance conversion device An impedance conversion device has four conductors arranged so that the first and second conductors form a transmission line having a first characteristic impedance, the third and fourth conductors form a transmission line having the first characteristic impedance, ...	11/04/2008
7444611	Automatic design method including automatic processing for equalizing spacing wiring and automatic designing apparatus thereof In an area extracting step, areas interposed among tower post rows adjacent to one another, and rectangular areas interposed among the tower post rows and pads at outer peripheral portions of a chip are respectively extracted as areas in which equalization of wire s...	10/28/2008
7439780	Chopper type comparator A comparator includes: a CMOS inverter constituted by a combination of a first p-channel MOS transistor and a first n-channel MOS transistor; a second p-channel MOS transistor connected in parallel to the first p-channel MOS transistor in an analog input period, and...	10/21/2008
7436916	Pulse modulator and PPM demodulation determining circuit employed in ultra wideband wireless communications The present invention provides a pulse modulator and a PPM demodulation determining circuit employed in Ultra Wideband (UWB) wireless communications. The pulse modulator comprises high frequency delayers which delay an input pulse, variable gainers each of which amp...	10/14/2008
7436340	Timing generating circuit and digital to analog converter using the same A current-cell type D/A converter using a timing generating circuit for converting a digital code to the corresponding differential voltage Vout between a first analog voltage and a second voltage includes a plural of current cells and a plural of switch-control-sig...	10/14/2008
7436248	Circuit for generating identical output currents A current driving circuit includes a bias voltage generator that generates a bias voltage and multiple constant current drivers that output driving currents. Each constant current driver includes first and second transistors coupled in series between two power suppl...	10/14/2008
7386285	Automatic gain control adaptive for plural modulation schemes An AGC circuit controls LNA and VGA amplifiers such that a received signal is converted at a high speed with tracking errors prevented according to each modulation scheme. The AGC circuit generates LNA and VGA control signals controlling the LNA and VGA amplifiers, ...	06/10/2008
7206289	Method of and apparatus for calculating traffic from data on packet transmission collected from routers In a method of managing traffic, routing tables and Use columns are collected from routers included in a network and stored router by router. A calculation table is produced for calculating the number of packets sent. It is determined whether or not a subject router...	04/17/2007
7105458	Method of etching semiconductor devices using a hydrogen peroxide-water mixture The present invention is a method of producing semiconductor devices and an etching liquid with which the titanium nitride film can be removed without thinning of the CoSi layer. A hydrogen peroxide-water mixture is used for removal of the titanium nitride film in t...	09/12/2006
7099335	Communication control apparatus A communication control apparatus which effectively uses a memory and does not need complicated hardware is realized. Each area of a frame assembly memory 2 is set to the maximum frame length which is handled. When a cell of a new connection is inputted, a me...	08/29/2006
7038549	Oscillator circuit with switchable feedback An oscillator circuit includes a pair of external terminals to which an external resonator is connected, an inverter connected between the external terminals, and an internal feedback path paralleling the inverter between the external terminals. An internal switchin...	05/02/2006
6600684	Semiconductor storage device Switching is provided such that the bit lines between a sense amp and the memory cells connected to the sense amp are put into a non-conducting state during normal operation, and are put into a conducting state during characteristic tests. A control circu...	07/29/2003
6596556	Light emitting diode and a method for manufacturing the same An LED is provided with a p-type semiconductor region in the shape of an island being buried in an n-type semiconductor region from the surface of it, and forms a pn junction at the interface between these n-type region and p-type region. The pn junction ...	07/22/2003
6589817	Semiconductor device, method for manufacturing the same, and method for mounting the same A method for manufacturing a semiconductor device is provided. The semiconductor device includes a semiconductor chip having an edge and having a surface with a plurality of electrodes. A film is mounted over the surface of the semiconductor chip, the fil...	07/08/2003
6587956	Semiconductor memory apparatus with power consumption control A process controller 130 and clock controller 190 are used to detect transfer rates when performing data write and read operations involving memories 180-1 to 180-n for recording data. The clock controller 190 frequency-divides clock signals generated by ...	07/01/2003
6587366	Ferroelectric memory device and method for operating ferroelectric memory device A ferroelectric memory device capable of high-speed drive having a word line to which a plurality of memory cells is connected, wherein the plurality of memory cells is divided into at least two memory cell groups, the memory cells configuring one memory ...	07/01/2003
6583910	Optical transmitter and optical communication system using the same An optical transmitter includes a light source emitting input light; and a modulator modulating the input light in accordance with an input electric signal to generate an optical transmission signal. The transmitter also includes a monitor which detects f...	06/24/2003
6580592	Semiconductor device A semiconductor device having an input circuit for effectively preventing breakdown caused by an electrostatic surge is provided. A first NMOS transistor is connected between an input terminal and an internal node, and a gate electrode of the first NMOS t...	06/17/2003
6574392	Wavelength router The present invention seeks to increase the number of wavelengths capable of being handled while reducing the sub peak and beat noise. A wave router acording to the invention has three acoustooptical filter elements; two wavelength division multiplicity r...	06/03/2003
6555884	Semiconductor device for providing a noise shield A first guard ring formed by high concentration ion diffusion is established around the transistor formation region of the semiconductor substrate. A second guard ring is established around the first guard ring with a prescribed gap therebetween. A metal ...	04/29/2003
6546064	Synchronization acquiring method synchronization acquiring apparatus A synchronization acquiring method capable of reducing the length of time required to perform in wireless communication a synchronization acquiring operation is provided when the mobile station transits from a sleep state to an active state. A synchroniza...	04/08/2003
6523413	Acoustic inspection method for hard disks, acoustic inspection system for hard disks, and program memory medium The invention has been developed to find out a blemish on the surface of a disk (in particular, a stroke mark in the CSS area) without opening up a hard disk. Furthermore, the invention is intended not to cause extra labor or cost in fabrication of hard d...	02/25/2003
6512699	Nonvolatile semiconductor memory device having a hierarchial bit line structure A nonvolatile semiconductor memory device comprising a plurality of memory cells each having a transistor including a floating gate electrode as a constituent are arranged on a silicon substrate in a matrix, wherein bit lines have hierarchical structures ...	01/28/2003
6511794	Method of forming resist pattern, and exposure device A method of forming a resist pattern and an exposure device using the method are provided in which a relatively large pattern, whose dimension is greater than a resolution limit of a KrF exposure technique, and an extremely fine pattern, whose dimension i...	01/28/2003
6493481	Optical switch unit K×K optical switch unit according to the present invention is comprised of input ports 1-1, . . . 1-36, 1×M optical matrix switches 5-1-1, . . . 5-4-9 connected with the input ports 1-1, . . . 1-36, N×N optical matrix switches 7-1-1, . . . 7-4-2, and 1...	12/10/2002
6487215	ATM communications system and ATM testing method An ATM signal generator generates packet signals by linking N data blocks that includes user data and a specifier byte containing a sequence number bit. A transmitter receives the packet signals, generates control signals containing length information, ge...	11/26/2002
6480081	Shock sensor A shock sensor includes a casing defining a cylindrical space therein. The sensor also includes a protecting tube placed the cylindrical space so as to define an annular space between the casing and the protecting tube, the protecting tube having an inner...	11/12/2002
6469824	Bi-directional pumped optical fiber amplifier with fault detection means and novel pump control A low cost L-band EDF (erbium doped fiber) amplifier offering high safety for human beings. Signal light and forward pumping light enter from the front end of the EDF. Amplified signal light exits and backward pumping light enters from the rear end of the...	10/22/2002
6459110	Semiconductor storage element A memory cell array, in which a voltage that can reverse polarization is applied only to a memory cell that is an object of data writing. A semiconductor storage element is formed by a ferroelectric capacitor, a selection transistor and a control transist...	10/01/2002
6420734	Light emitting diode and a method manufacturing the same An LED is provided with a p-type semiconductor region in the shape of an island being buried in an n-type semiconductor region from the surface of it, and forms a pn junction at the interface between these n-type region and p-type region. The pn junction ...	07/16/2002
6407410	Semiconductor optical device A light emitting diode in accordance with the present invention has a p-n junction which is formed by selectively implanting an impurity from the surface of a semiconductor substrate, and also has an etched groove which is formed in the p-n junction area ...	06/18/2002
6405295	Data storage apparatus for efficient utilization of limited cycle memory material In the semiconductor memory device relating to the present invention, the memory is divided into a plurality of blocks having a plurality of sectors and stores user data in units of sectors. When writing one sector of user data, the controller converts th...	06/11/2002
6396117	Semiconductor photodetector, method for manufacturing semiconductor photodetector and photodetector module Light on the longer wavelength side can be photoelectrically converted and output reliably, whilst improving the structural and operational reliability of a photodetector, by means of a simple manufacturing process and inexpensive manufacturing costs. A f...	05/28/2002
6374018	Optical switch, method of operating optical switch, and method of designing optical switch An optical switch in which operational ranges of both a bar state and a cross state are wide is provided. By applying voltages of +V, -V, -V and+V independently to a first electrode 20A, a second electrode 20B, a third electrode 20C and a fourth electrode...	04/16/2002
6370212	Method and device for decoding manchester encoded data In a Manchester encoded data decoder a clock component is extracted from input data inputted at a prescribed rate, the extracted clock component is taken as input and transition points are extracted from the signal waveform of the filter output, a clock s...	04/09/2002
6356157	Phase locked loop circuit The Phase Locked Loop circuit of this invention has both a short locking time and a stable operation. This Phase Locked Loop circuit has two phase comparators. The inputs to these two comparators are a reference signal Vf and a feedback signal ...	03/12/2002
6351194	Electronic component utilizing face-down mounting An electronic component having a multi-layered printed circuit board made of an organic material, a plurality of electronic components mounted in a face-down position on the multi-layered printed circuit board, a metal cover for covering the plurality of ...	02/26/2002
6344924	Optical fiber amplifier and output power flattening method of optical fiber amplifier Optical fiber amplifiers with a simple composition than can accurately flatten optical output power in a fixed range are provided. Main optical amplifiers and first gain equalizers connected to these amplifiers are disposed between input port and output p...	02/05/2002
6333894	Semiconductor storage device The present invention implements a decrease in chip size. The device is comprised of memory cell arrays 34a and 34b, a bank selector 36, a cell select circuit 38a, a data multiplexer 40, and an input/output buffer 42. The bank selector generates a bank se...	12/25/2001

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Assignee: Oki Electric Industry Co., Ltd.