Abstract: A semiconductor storage employs a base substrate (101) having a command/address external terminal group (CA), a data input/output external terminal group (DQ), and a single chip select external terminal (CS), and also comprises a plurality of memory chips (110) to (113) mounted on a base substrate (101), each of which can individually carry out read and write operations. The terminals (CA), (DQ), and (CS) are connected to an interface chip (120). The interface chip (120) has a chip select signal generation circuit that can individually activate a plurality of memory chips (110) to (113) on the basis of an address signal fed by way of the terminal (CA) and on the basis of a chip select signal fed by way of the terminal (CS).

Abstract: The present invention provides an optical module using optical waveguides which permits easy fabrication of a PLC type optical multiplexer/demultiplexer with reduced loss. The optical module comprises cores which are contiguous to each other through a dicing groove adapted to position and fix an optical functional part such as a wavelength selection filter and a core branched from the said cores. A slight gap is present between the former and the latter core and both cores are narrower in width in the vicinity of the dicing groove than the other portions.

Abstract: An electrophoresis member is produced by laying a plurality of capillaries on an adhesive layer born on a support layer to form a capillary layer, laminating thereon a second support layer, and partially removing the first support layer, the first adhesive layer and the second support layer to partially expose the capillaries to form a window portion for irradiation and detection and a sample injection portion for injecting a sample.

Abstract: An electrophoresis member is produced by laying a plurality of capillaries on an adhesive layer born on a support layer to form a capillary layer, laminating thereon a second support layer, and partially removing the first support layer, the first adhesive layer and the second support layer to partially expose the capillaries to form a window portion for irradiation and detection and a sample injection portion for injecting a sample.

Abstract: A multi-band multi-mode wireless communication device comprises a first antenna, a second antenna, a first transmitter circuit corresponding to the FDD system, a first receiver circuit and a second receiver circuit, a first transmitter circuit and a third receiver circuit corresponding to the TDD system, a duplexer, an SP3T switch, and a base-band signal processor. The second transmitter circuit, third receiver circuit and duplexer are connected with each other via the first antenna and the SP3T switch, the duplexer is connected to the first transmitter circuit and the first receiver circuit, and the second antenna is connected to the second receiver circuit. The received signals corresponding to the FDD system received by the first and second antennas are inputted to the base-band signal processor via the first and second receiver circuits and are then synthesized therein.

Abstract: An object of disclosed technology is to control lasing wavelengths so that a wavelength shift does not occurs. Another object is to permit wavelengths of a light source for wavelength division multiplexing optical-fiber communication system to be variable in response to an ITU-TS grid. A means for achieving the objects is as follows: locating an etalon in a light path of diode laser light, which is a parallel plane wave changed by a collimator lens; generating a wavelength error signal from a difference between both of divided pieces of light from transmitted light or reflected light; and locking a wavelength of a diode laser device according to the wavelength error signal.

Abstract: In a MIMO wireless transceiver, priority control that judges priority of transmit data and a transmission mode table are provided to control an option as to which transmission system SDM or STBC is selected, coding rate and modulation method based on a transmission mode for a transmission destination that is determined by priority of transmission data and status of a communication matrix at the time of data transmission. With such arrangement, a wireless communication system composed of the MIMO wireless transceiver can control coding, MIMO signal processing and modulation methods according to priority of transmit data. More specifically, it is possible to ensure transmission of data having higher priority and improve throughput in total when a plurality of types of data are transmitted.

Abstract: A radio frequency circuit apparatus and a radio frequency module which permit alleviation of the PA efficiency drop and are compatible with both a MIMO system and a conventional system are to be provided. They are provided with a plurality of power amplifiers for amplifying a transmit signal and the plurality of power amplifiers include at least two power amplifiers differing in maximum output power from each other, and at least one out of the plurality of power amplifiers is used according to the communication system.

Abstract: A semiconductor storage employs a base substrate (101) having a command/address external terminal group (CA), a data input/output external terminal group (DQ), and a single chip select external terminal (CS), and also comprises a plurality of memory chips (110) to (113) mounted on a base substrate (101), each of which can individually carry out read and write operations. The terminals (CA), (DQ), and (CS) are connected to an interface chip (120). The interface chip (120) has a chip select signal generation circuit that can individually activate a plurality of memory chips (110) to (113) on the basis of an address signal fed by way of the terminal (CA) and on the basis of a chip select signal fed by way of the terminal (CS).

Abstract: The present invention provides an optical module using optical waveguides which permits easy fabrication of a PLC type optical multiplexer/demultiplexer with reduced loss. The optical module comprises cores which are contiguous to each other through a dicing groove adapted to position and fix an optical functional part such as a wavelength selection filter and a core branched from the said cores. A slight gap is present between the former and the latter core and both cores are narrower in width in the vicinity of the dicing groove than the other portions.

Abstract: The present invention has an object of enhancing the tolerance of setup positioning error of an optical multiplexer/demultiplexer which uses a multi-mode optical waveguide. For this sake, the invention is designed to couple the multi-mode optical waveguide with a single-mode optical waveguide directly. In another configuration of this invention, there is provided between both optical waveguides a single-mode optical waveguide having its length set to be approximately equal to zero, or equal or approximately equal to the period of interference between the 0th-order mode and a radiative higher-order mode of the single-mode optical waveguide.

Abstract: A radio frequency module with a SAW package mounted on the substrate is provided in a low profile structure also having excellent resistance to noise or in other words, electromagnetic compatibility even when a resin-sealed SAW package is utilized. Organic laminate of at least a single layer is used as the substrate of the radio frequency module, and a throughhole is formed on that organic laminate. The resin-sealed SAW package that encloses a flip-chip mounted SAW filter is mounted so that the ceramic substrate is positioned mainly outside the throughhole, and the SAW filter is positioned mainly inside the throughhole. A grounding conductor is formed on the rear side or the inner layer in the vicinity of the throughhole.

Abstract: An optical transmitter/receiver module of wavelength division multiplexing type which undergoes a reduced excess loss resulting from the displacement of a dicing position is fabricated with a high yield rate. An optical waveguide for guiding reflected light from a wavelength selection filter has a core substantially larger in size than the core of each of the other optical waveguides.

Abstract: An LD module capable of generating a good optical waveform at a high speed of about 10 Gbit/s or higher in which a damping resistor is disposed in parallel with a laser-diode device in the inside of a laser-diode module, the damping resistor being preferably disposed between the connection point of the high-frequency transmission line and the terminating resistor, and the ground.

Abstract: A polymeric optical waveguide substrate includes a first region provided thereon with a polymer optical waveguide and an optical waveguide-free second region, the first and second regions being on the same substrate, wherein an adhesive layer is between the lowermost polymer layer constituting the optical waveguide in the first region and the substrate, and wherein a groove intrudes into the substrate at the boundary between the first and second regions. A method for preparing the waveguide substrate includes the steps of applying an adhesive layer onto the first region while the second region is free of any adhesive layer; applying a polymer onto the whole surface of the substrate to give a polymer layer for forming an optical waveguide following the formation of the adhesive layer; cutting the polymer layer at the boundary between the first and second regions; and peeling off or removing the polymer on the second region.

Abstract: An optical transmitter/receiver module of wavelength division multiplexing type which undergoes a reduced excess loss resulting from the displacement of a dicing position is fabricated with a high yield rate. An optical waveguide for guiding reflected light from a wavelength selection filter has a core substantially larger in size than the core of each of the other optical waveguides.

Abstract: The subject to be attained by the disclosed technique is to provide an optical unit less expensive than conventional like optical units and having a wavelength multiplexer and optical waveguides. For achieving the above subject there is provided a wavelength multiplexer wherein a light combining/branching section is constituted by a multi-mode interference type optical waveguide, and an incident-side optical waveguide and a reflection-side optical waveguide are spaced a predetermined distance from each other at their connections to the multi-mode interference type optical waveguide. An optical filter is installed in the multi-mode interference type optical waveguide and a multi-mode interference is set so that a peak in a light intensity distribution is formed in the vicinity of an inlet of each of an exit-side optical waveguide and the reflection-side optical waveguide.

Abstract: An object of the disclosed technology is to realize, at low cost, an optical communication module capable of high-speed operation and having an excellent EMC property. A means for achieving the object is as follows. A main body of an optical module is formed of a ceramic multilayer structure, and a high-frequency line is provided. A surface of the main body is provided with an electrode pattern, which is electrically connected to a ground pin. A metal cap is secured to the electrode pattern using a conductive adhesive.

Abstract: The present invention has an object of enhancing the tolerance of setup positioning error of an optical multiplexer/demultiplexer which uses a multi-mode optical waveguide. For this sake, the invention is designed to couple the multi-mode optical waveguide with a single-mode optical waveguide directly. In another configuration of this invention, there is provided between both optical waveguides a single-mode optical waveguide having its length set to be approximately equal to zero, or equal or approximately equal to the period of interference between the 0th-order mode and a radiative higher-order mode of the single-mode optical waveguide.

Abstract: An electrophoresis member is produced by laying a plurality of capillaries on an adhesive layer born on a support layer to form a capillary layer, laminating thereon a second support layer, and partially removing the first support layer, the first adhesive layer and the second support layer to partially expose the capillaries to form a window portion for irradiation and detection and a sample injection portion for injecting a sample.