Patents by Inventor Tetsuya Aoki
Tetsuya Aoki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20040067068Abstract: A sample & hold type phase detector is used in a CDR IC and, in jitter transfer bandwidth adjustment, VCO output waveforms 90° out of phase with each other can be inputted to the phase detector, whereby a jitter transfer bandwidth can be calculated by only the measurement of frequency and of a DC voltage and it is possible to make a jitter transfer bandwidth adjustment in DC test for IC.Type: ApplicationFiled: August 15, 2001Publication date: April 8, 2004Inventors: Norio Chujo, Keiichi Yamamoto, Akio Osaki, Katsunori Hirano, Takayuki Nakao, Tomoaki Shimotsu, Atsushi Hasegawa, Tetsuya Aoki, Takeshi Yamashita
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Publication number: 20040033057Abstract: A signal reproduction device and signal reproduction method capable of automatically discriminating the format of input data and reproducing the data is provided.Type: ApplicationFiled: June 6, 2003Publication date: February 19, 2004Inventors: Tomomasa Kojo, Tetsuya Aoki, Kenji Shiba
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Publication number: 20030202804Abstract: In order to solve the problem that since a loop filter constant suitable for asynchronous state cannot be selected in the conventional phase frequency synchronism circuit, it takes a long time to synchronize the input data and the clock signal from the asynchronous state, the present invention is to propose a phase frequency synchronism circuit including a phase comparator for generating a voltage according to the phase difference of the clock signal to the input signal, a frequency comparator for deciding if the frequency of the clock signal is higher or lower than the transmission rate of the input signal and generating a binary signal, a synchronous identifying unit for deciding if the input signal and the clock signal are synchronized in their phases and frequencies, a first switch that receives the output from the phase comparator and is closed and opened when the synchronous identifying unit decides that they are synchronized and not synchronized, respectively, a second switch that receives the output fType: ApplicationFiled: May 12, 2003Publication date: October 30, 2003Applicant: Hitachi, Ltd.Inventors: Atsushi Hasegawa, Tetsuya Aoki, Takeshi Yamashita
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Publication number: 20030176936Abstract: The present invention provides a digital signal processor which receives 1-bit audio signals acquired by the &Dgr;-sigma modulation and sent over a predetermined transmission line and makes a changeover the audio signal and a mute pattern. The digital signal processor includes an IEEE 1394 interlace (31). The IEEE 1394 interface (31) receives an isochronous packet sent over an IEEE 1394-formatted transmission line (20), extracts music data from the packet, supplies the music data to a DRAM (32), monitors the amount of data stored in the DRAM (32), reads a 1-bit digital signal or generates a mute pattern such as a 9-6 pattern, and makes a changeover between the 1-bit digital signal read from the DRAM (32) and mute pattern while fading them. The digital signal processor further includes a D-A converter (35) to convert the 1-bit digital signal supplied from the IEEE 1394 interface (31) into an analog signal.Type: ApplicationFiled: February 7, 2003Publication date: September 18, 2003Inventors: Hiroshi Nagasawa, Kenji Shiba, Tetsuya Aoki
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Patent number: 6600797Abstract: In order to solve the problem that since a loop filter constant suitable for asynchronous state cannot be selected in the conventional phase frequency synchronism circuit, it takes a long time to synchronize the input data and the clock signal from the asynchronous state, the present invention is to propose a phase frequency synchronism circuit including a phase comparator for generating a voltage according to the phase difference of the clock signal to the input signal, a frequency comparator for deciding if the frequency of the clock signal is higher or lower than the transmission rate of the input signal and generating a binary signal, a synchronous identifying unit for deciding if the input signal and the clock signal are synchronized in their phases and frequencies, a first switch that receives the output from the phase comparator and is closed and opened when the synchronous identifying unit decides that they are synchronized and not synchronized, respectively, a second switch that receives the output fType: GrantFiled: March 3, 2000Date of Patent: July 29, 2003Assignee: Hitachi, Ltd.Inventors: Atsushi Hasegawa, Tetsuya Aoki, Takeshi Yamashita
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Patent number: 6505647Abstract: The four-way selector valve relating to the invention basically comprises a motor which has a stator and a rotor, a case, and a main body including a main valve and a valve seat, both of which are arranged in a valve chest within the case. The valve seat has a suction pressure passage and a discharge pressure passage, which lead to a suction port of a compressor and a discharge port thereof, respectively, and two passage holes which lead to indoor and outdoor heat exchangers, respectively. The main valve has a connecting part which selectively leads to one of the suction pressure passage and the two passage holes, and a pressure equalization orifice which links the connecting part and the valve chest. A rotor sleeve, which comprises the rotor, is equipped with an auxiliary valve which opens or closes the pressure equalization orifice in order to transfer pressure, and an operating pin which moves the position of the main valve.Type: GrantFiled: February 9, 2001Date of Patent: January 14, 2003Assignee: Fujikoki CorporationInventors: Eiichi Sasada, Tetsuya Aoki
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Patent number: 6498416Abstract: An electromagnetic actuator has a stator core, an armature and a coil. The stator core is formed as a seamless cylindrical tube having a thin wall as a magnetic restrictor. The thin wall has a thickness sufficient to maintain a mechanical strength of the stator core. A permanent magnet is located on an outside of the thin wall to generate a magnetic flux passing through the thin wall in the same direction as a magnetic flux generated by the coil. The thin wall is magnetically saturated with the magnetic flux generated by the permanent magnet. When the coil is energized, a magnetic flux generated by the coil gets around the saturated thin wall and passes through the armature.Type: GrantFiled: June 19, 2000Date of Patent: December 24, 2002Assignee: Denso CorporationInventors: Kenichi Oishi, Motoyoshi Ando, Hiroyuki Nakane, Seiji Tachibana, Tetsuya Aoki
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Publication number: 20020176425Abstract: This invention is intended to realize with ease flow control and quantization error reduction in a data transfer operation executed via the IEEE 1394 serial bus. A FIFO once holds data supplied from a decoder and outputs the data in a predetermined send timing relation. At this moment, a counter counts the number of packets to sent from the FIFO to an IEEE 1394 bus. In order to increasing data transfer quantity in accordance with a send command issued by a register, a data packet is sent at transfer of an empty packet. In order to decrease data transfer quantity, an empty packet is sent in a timed relation in which a data packet is sent. A data quantity monitor requests the decoder for supplying data or stopping thereof via a data input controller so as to prevent the FIFO from overflowing or being emptied in accordance with flow control.Type: ApplicationFiled: May 23, 2002Publication date: November 28, 2002Inventor: Tetsuya Aoki
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Patent number: 6476600Abstract: A compact and high-accuracy angular position measuring device is provided which has magnets installed in a rotor core and a magnetic sensor installed in a stator core. The magnetic sensor produces an output indicative of an angular position of the rotor core as a function of a change in density of magnetic flux produced by the magnets. The magnets are so arranged in the rotor core that the same poles are opposed magnetically to produce a repellent force in magnetic fields of the magnets, thereby causing the magnetic flux to go to the magnetic sensor through the rotor core. This eliminates the need for an air gap between the stator core and the poles of the magnets which is formed in a conventional device, thus allowing the device to be reduced in size and an error in output of the device to be decreased.Type: GrantFiled: January 26, 2001Date of Patent: November 5, 2002Assignee: Denso CorporationInventors: Yoshiyuki Kono, Takashi Hamaoka, Takamitsu Kubota, Takuya Fukitsuke, Tetsuya Aoki
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Patent number: 6463060Abstract: A signal processing circuit which enables an error bit to be set simply without causing an increase in the size of the circuit even if the packet size is changed and which enables realization of stable operation without the system stopping even if the value of the time stamp is impossible. A pre-reception processing circuit decides if a received packet is normally continuous or discontinuous from data in the DBC region of the CIP header. When deciding it is discontinuous, it sets an error bit ERM allocated to one bit of the upper significant 7 bits of the source packet header to “1”, and writes this in an FIFO. A post-reception processing circuit, when reading from the FIFO, outputs the data stored in the FIFO to the application side when the error bit ERM is “0” and resets the error bit and outputs a dummy error packet when the error bit EMR is “1”.Type: GrantFiled: June 1, 2001Date of Patent: October 8, 2002Assignee: Sony CorporationInventors: Sadaharu Sato, Takayasu Muto, Tetsuya Aoki
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Publication number: 20020051268Abstract: To provide economical high-speed optical communications through an optical module a silicon substrate with a ball lens and semiconductor luminescence element mounted thereon, and a laser driver IC are provided. A silicon subassembly includes a silicon substrate with a pyramidal cavity etched into the substrate near its edge. A ball lens is precision-mounted in the pyramidal cavity by bonding it at multiple points. This provides a high-strength connection and a small, inexpensive silicon substrate. Also provided on the silicon substrate is a semiconductor luminescence element and a slit on the opposite side of the ball lens. The slit enables collimated light emitted from the ball lens to be optically coupled without being blocked or reflected by the substrate. The semiconductor luminescence element and its laser driver IC are placed in close proximity to each other, and ribbon wires are kept short (approximately 300 &mgr;m) to reduce signal line impedance mismatch for high-speed transmission.Type: ApplicationFiled: February 19, 2001Publication date: May 2, 2002Inventors: Koichiro Tonehira, Hiroshi Yamamoto, Kenji Yoshimoto, Michihide Sasada, Tetsuya Aoki
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Patent number: 6305122Abstract: A mosquito killing apparatus includes an electroshock unit to which a high voltage applies, a heater to generate heats, a carbon dioxide (CO2) gas introduction inlet connected to discharging portions for discharging carbon dioxide (CO2) gas around the electroshock unit, and a protection cover provided outside the electroshock unit for covering the electroshock unit. The carbon dioxide (CO2) gas introduction inlet can be connected to carbon dioxide (CO2) gas generating means of various types, and a carbon dioxide (CO2) gas staying unit is formed around the electroshock unit to stay the carbon dioxide (CO2) gas introduced from the carbon dioxide (CO2) gas introduction inlet to surely electrocute attracted mosquitoes.Type: GrantFiled: May 14, 1999Date of Patent: October 23, 2001Assignees: Chuba Electric Power Co., Inc., Chuba Seiki Co., Inc.Inventors: Kenzou Iwao, Kiyoshi Makiya, Tetsuya Aoki, Yoshihiro Inoue
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Publication number: 20010013369Abstract: The four-way selector valve relating to the invention basically comprises a motor which has a stator and a rotor, a case, and a main body including a main valve and a valve seat, both of which are arranged in a valve chest within the case. The valve seat has a suction pressure passage and a discharge pressure passage, which lead to a suction port of a compressor and a discharge port thereof, respectively, and two passage holes which lead to indoor and outdoor heat exchangers, respectively. The main valve has a connecting part which selectively leads to one of the suction pressure passage and the two passage holes, and a pressure equalization orifice which links the connecting part and the valve chest. A rotor sleeve, which comprises the rotor, is equipped with an auxiliary valve which opens or closes the pressure equalization orifice in order to transfer pressure, and an operating pin which moves the position of the main valve.Type: ApplicationFiled: February 9, 2001Publication date: August 16, 2001Applicant: Fujikoki CorporationInventors: Eiichi Sasada, Tetsuya Aoki
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Publication number: 20010009366Abstract: A compact and high-accuracy angular position measuring device is provided which has magnets installed in a rotor core and a magnetic sensor installed in a stator core. The magnetic sensor produces an output indicative of an angular position of the rotor core as a function of a change in density of magnetic flux produced by the magnets. The magnets are so arranged in the rotor core that the same poles are opposed magnetically to produce a repellent force in magnetic fields of the magnets, thereby causing the magnetic flux to go to the magnetic sensor through the rotor core. This eliminates the need for an air gap between the stator core and the poles of the magnets which is formed in a conventional device, thus allowing the device to be reduced in size and an error in output of the device to be decreased.Type: ApplicationFiled: January 26, 2001Publication date: July 26, 2001Inventors: Yoshiyuki Kono, Takashi Hamaoka, Takamitsu Kubota, Takuya Fukitsuke, Tetsuya Aoki
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Patent number: 6259694Abstract: A signal processing circuit which enables an error bit to be set simply without causing an increase in the size of the circuit even if the packet size is changed and which enables realization of stable operation without the system stopping even if the value of the time stamp is impossible. A pre-reception processing circuit decides if a received packet is normally continuous or discontinuous from data in the DBC region of the CIP header. When deciding it is discontinuous, it sets an error bit ERM allocated to one bit of the upper significant 7 bits of the source packet header to “1”, and writes this in an FIFO. A post-reception processing circuit, when reading from the FIFO, outputs the data stored in the FIFO to the application side when the error bit ERM is “0” and resets the error bit and outputs a dummy error packet when the error bit EMR is “1”.Type: GrantFiled: March 27, 1998Date of Patent: July 10, 2001Assignee: Sony CorporationInventors: Sadaharu Sato, Takayasu Muto, Tetsuya Aoki
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Patent number: 6159999Abstract: An antimicrobial composition is provided in which the skin irritation of isothiazolone type compound is decreased and the injection operation properties thereof is improved by forming it as an uniform solution. The composition contains isothiazolone type compound and a compound which decreases the skin irritation of the former in a molar ratio of 1:0.1-50 and is dissolved in a solvent.Type: GrantFiled: December 21, 1998Date of Patent: December 12, 2000Assignee: Kurita Water Industries Ltd.Inventors: Minoru Yagi, Tetsuya Aoki
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Patent number: 5991371Abstract: A communication apparatus including (A) a data obtaining device which obtains a plurality of sets of own-call-number data each set of which identifies a corresponding one of a plurality of different own call numbers allotted to the communication apparatus according to a common numbering rule, each of the different own call numbers identifying the communication apparatus from other communication apparatuses to which other call numbers different from the own call numbers are allotted according to the common numbering rule; and (B) one or both of (b1) an information receiver which can receive information from the other communication apparatuses and (b2) an information transmitter which can transmit information to the other communication apparatuses, the information receiver and/or the information transmitter being operable in a plurality of different manners corresponding to the different own call numbers, respectively, such that the information receiver and/or transmitter operate in one of the different mannersType: GrantFiled: December 1, 1997Date of Patent: November 23, 1999Assignee: Brother Kogyo Kabushiki KaishaInventors: Tetsuya Ouchi, Makoto Yamada, Fumihiro Minamizawa, Tetsuya Aoki
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Patent number: 5851003Abstract: Objective To avoid undesirable contact between the moving side stopper and the fixed side stopper, to maximize the contact width at the time of hitting, to decrease damages, wearing, etc. to those stoppers, and to improve reliability of the moving side stopper and the fixed side stopper in terms of rigidity and durability. Solution To provide a motor operated valve comprising a valve body 20, a screw fed valve stem 30 and a shaft 35, a motor 10 which rotationally drive the aforementioned shaft 35, a sleeve 40 having a convexed moving side stopper 41 which is rotated with the aforementioned shaft 35 as a monolithic structure, and a fixed bearing washer having a convexed fixed side stopper 55 to which the aforementioned moving side stopper 41 hits, and where a clearance slope 41a to avoid hitting the fixed side stopper 55 is provided on the rear part, looking in the rotational direction, of the aforementioned moving side stopper 41.Type: GrantFiled: November 4, 1996Date of Patent: December 22, 1998Assignee: Fujikoki CorporationInventors: Tetsuya Aoki, Tadashi Hasegawa, Tomoari Ohuchi
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Patent number: 5813691Abstract: A twist beam type suspension has a twist beam having an increased rigidity. Each of a pair of trailing arms has a front end pivotally mounted on a body of the vehicle and a rear end rotatably supporting a wheel. A twist beam extends between the trailing arms in a side-to-side direction of the vehicle. Opposite ends of the twist beam are connected to the respective trailing arms. The twist beam has a bent portion projecting upwardly in the center of the twist beam.Type: GrantFiled: March 19, 1996Date of Patent: September 29, 1998Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tetsuya Aoki, Yoji Uchida, Mamoru Sakamoto, Toshiyasu Santo, Tatsuzo Komiya, Masaharu Ohba
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Patent number: 5766375Abstract: A non-oriented magnetic steel sheet having excellent bending workability and magnetic characteristics is obtained by continuous annealing. The non-oriented magnetic steel sheet is obtained by the method comprising cold rolling a hot-rolled steel sheet, continuously annealing the steel sheet, and then performing skin pass rolling; the steel has a composition comprising about 0.005 mass % or less of C, about 0.05 to 0.30 mass % of Si, about 0.10 to 0.50 mass % of Mn, about 0.15 to 0.50 mass % of Al, and about 0.0050 mass % or less of N.Type: GrantFiled: March 21, 1997Date of Patent: June 16, 1998Assignee: Kawasaki Steel CorporationInventors: Susumu Okamura, Etsuji Hino, Yoshinori Fujita, Masaki Shimizu, Tetsuya Aoki, Shoichi Takenouchi