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Hideo Fukuda
Hideo Fukuda, Kyoto JP
| Patent application number | Description | Published |
|---|---|---|
| 20090090847 | OPTICAL SEMICONDUCTOR DEVICE AND INFRARED DATA COMMUNICATION APPARATUS - An optical semiconductor device converts a light signal into an electric signal and amplifies the converted electric signal, and includes: a photodiode which converts a light signal into a current signal; another photodiode which converts a light signal into a current signal; a current amplifying circuit which includes an operational amplifier which amplifies an output current from the photodiode; and a current-voltage conversion circuit which converts an output current from the other photodiode into a voltage, wherein an output terminal of the current amplifying circuit is connected to an input terminal of the current-voltage conversion circuit. | 04-09-2009 |
| 20100283474 | TEST CIRCUIT AND OPTICAL PICKUP DEVICE - A test circuit for testing not only characteristics of a current-voltage conversion circuit in which a light-receiving element is used but also characteristics of the light-receiving element includes: a current-mirror circuit | 11-11-2010 |
| 20110147873 | OPTICAL SEMICONDUCTOR DEVICE, AND OPTICAL PICKUP DEVICE AND ELECTRONIC DEVICE USING THE OPTICAL SEMICONDUCTOR DEVICE - A semiconductor substrate is bonded to a glass board in a peripheral portion of the semiconductor substrate by an adhesive layer. A hollow region is formed in a portion surrounded by the semiconductor substrate, the glass board, and the adhesive layer. In the hollow region, reinforcing adhesive layers are formed on a back surface of the semiconductor substrate and at positions corresponding to bumps provided at regular intervals. The reinforcing adhesive layers allow the semiconductor substrate to have strength withstanding to a load of a testing probe. | 06-23-2011 |
| 20110199673 | INTEGRATED OPTICAL DEVICE AND OPTICAL PICKUP DEVICE USING THE SAME - An integrated optical device includes a plurality of semiconductor lasers which emit different wavelengths of laser light, a comparator circuit which compares voltages across terminals of the respective plurality of semiconductor lasers, and outputs a signal depending on the comparison result, a light-receiving element which outputs a photocurrent depending on the amounts of laser light emitted from the plurality of semiconductor lasers, and a current mirror circuit which switches between amplification and attenuation with respect to the photocurrent output from the light-receiving element based on the signal output from the comparator circuit, and outputs a monitor signal. | 08-18-2011 |
| 20110227650 | RECEIVED-LIGHT AMPLIFYING CIRCUIT AND OPTICAL DISC APPARATUS - A received-light amplifying circuit includes: an amplifier AMP | 09-22-2011 |
Hideo Fukuda, Hyogo JP
| Patent application number | Description | Published |
|---|---|---|
| 20100148514 | WIND TURBINE GENERATING APPARATUS - The invention provides a wind turbine generating apparatus capable of controlling a temperature in a rotor head. In a wind turbine generating apparatus in which a driving/generating mechanism coupled to a rotor head having wind turbine blades attached thereto is housed in a nacelle, and control devices are housed in a hub of the rotor head, an air circulation guide is provided for allowing air to circulate between an inside of the rotor head and an inside of the nacelle via a communication path formed between the rotor head and the nacelle. | 06-17-2010 |
| 20110139092 | REHEAT BOILER - Provided is a reheat boiler in which the imbalance in temperature distribution of the temperature of the combustion gas at the outlet of a reheat furnace is reduced by changing the gas flow pattern in the reheat burner. A reheat boiler includes a main boiler configured such that main combustion gas generated in combustion in a burner flows from a furnace through a superheater and evaporator tubes, a reheat furnace that is disposed on the downstream of the evaporator tubes and produces reheat combustion gas by combustion in a reheat burner, and a reheater disposed above the reheat furnace. A closing plate, serving as a drift preventing portion, is provided at a reheat furnace outlet that connects the reheat furnace and the reheater to form a flow path for the combustion gas and the reheat combustion gas so as to narrow the cross-sectional area of the flow path for the combustion gas. | 06-16-2011 |
Hideo Fukuda, Kyoto-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20090008535 | Differential amplifier circuit, operational amplifier circuit, light-receiving amplifier circuit using the same, function selection circuit, and light-receiving circuit using the same - A differential amplifier circuit, an operational amplifier circuit, and a light-receiving amplifier circuit using the same are provided, by which the influence of an on resistance of an analog switch is reduced during the switching of gain resistances. An NPN transistor Q | 01-08-2009 |
Hideo Fukuda, Nagasaki-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20120057668 | REACTOR CONTAINMENT STRUCTURE - The reactor containment structure is provided with a reactor containment vessel, a reactor containment chamber installed inside the reactor containment vessel to contain a nuclear power reactor, a pool installed inside the reactor containment vessel so as to be below the reactor containment chamber adjacently and in which an emergency cooling liquid is stored, an opening part for allowing the emergency cooling liquid to flow from the reactor containment chamber into the pool, a sump installed below the pool, a debris filtering body installed at the sump to filter debris contained in the emergency cooling liquid, a pumping system which sucks the emergency cooling liquid from the sump and discharges the emergency cooling liquid into the reactor containment chamber, and a debris trapping part installed in the pool to trap the debris, wherein the debris trapping part intersects with a flow path of the emergency cooling liquid. | 03-08-2012 |