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Kamimura, Osaka
Fumiya Kamimura, Osaka JP
| Patent application number | Description | Published |
|---|---|---|
| 20080231368 | WIRELESS FREQUENCY POWER AMPLIFIER, SEMICONDUCTOR DEVICE, AND WIRELESS FREQUENCY POWER AMPLIFICATION METHOD - A differential amplifier circuit is connected to the input node and the output node of the final amplification stage through detection circuits. The signal level difference output from the differential amplifier circuit does not change even if the input power varies. Because a change in the power gain at the output node does not travel back to the input node when the load impedance of the wireless frequency power amplifier varies, it is possible to detect only the change in the load impedance. Damage to the final stage can be prevented by controlling the operating current of the final stage and the gain of the drive stage according to the detected load variation. Nonlinear distortion in the wireless frequency power amplifier output can also be reduced by detecting and canceling the change in the gain of the drive stage by changing the gain of the adjustment stage. | 09-25-2008 |
| 20090011727 | WIRELESS TRANSMITTER - A wireless transmission device includes a RF power amplification section for amplifying a transmit RF signal and outputting the amplified signal to a transmission antenna, a detector section, and a control section. The RF power amplification section includes a plurality of stages of amplification, the transmit RF signal is input to an input of a first one of the plurality of stages of amplification, and an output of a last one of the plurality of stages of amplification is output to the transmission antenna. The detector section includes a plurality of detectors provided so as to correspond to the plurality of stages of amplification, each for detecting an input level of a corresponding one of the stages of amplification, and a synthesizer for synthesizing together detection outputs from the plurality of detectors. The control section controls, in a feedback control, an output level of the RF power amplification section based on an output level of the synthesizer. | 01-08-2009 |
Hiromi Kamimura, Osaka JP
| Patent application number | Description | Published |
|---|---|---|
| 20100104335 | FIXING ROLLER/FIXING BELT, AND PROCESS FOR MANUFACTURING THE SAME - A fixing roller/fixing belt having an elastic layer and a surface layer formed on a substrate material in the enumerated order, wherein the surface layer is a layer formed by thermally shrinking a PFA tube, and the surface layer and the elastic layer are bonded together through a PFA-containing adhesive material. In particular, a fixing roller/fixing belt in which the ratio of heat shrinkage of the PFA tube forming the surface layer is 3 to 20%. Also, a fixing roller/fixing belt, in which the quantity of PFA contained in the PFA-containing adhesive material is 20 to 30 wt %. | 04-29-2010 |
Ryosuke Kamimura, Osaka JP
| Patent application number | Description | Published |
|---|---|---|
| 20080241203 | Antiadhesive Kit, Process for Producing the Same and Method of Adhesion Prevention - An adhesion preventive kit and a method of preventing adhesion are provided which have a preventive effect on adhesion in a surrounding part of an edge of an injured or deficient tissue in guided regeneration therapy for an injured tissue. Specifically, the adhesion preventive kit includes: (A) a first membrane of at least two layers having a biodegradable base layer and an adhesion preventive layer provided respectively at outermost surfaces thereof and a second membrane of at least one layer having an adhesion preventive layer provided at an outermost surface thereof, or (B) an adhesion preventive membrane including a biodegradable base layer and an adhesion preventive layer, which membrane has an outermost surface constituted of the adhesion preventive layer and has a tissue sandwiching part. | 10-02-2008 |
Tomohiko Kamimura, Osaka JP
| Patent application number | Description | Published |
|---|---|---|
| 20090296978 | Speaker - The invention relates to a small speaker. A speaker | 12-03-2009 |
| 20090296979 | Speaker - The invention provides a speaker comprising: a magnetic circuit | 12-03-2009 |
| 20100316249 | SPEAKER - The invention provides a speaker in which a damper is effectively added without impairing the thinness of the speaker, and which, although the speaker is thin and small, exhibits high withstand input and high output power performances. A damper ( | 12-16-2010 |
| 20110075880 | SPEAKER DAMPER AND SPEAKER INCLUDING THE SAME - The invention provides a speaker damper ( | 03-31-2011 |
| 20110123061 | ELECTROACOUSTIC TRANSDUCING DEVICE - A yoke-integral frame is formed by a simple pressing process, and the numbers of components and production steps of an electroacoustic transducing device are reduced, thereby improving the productivity. | 05-26-2011 |