Patents by Inventor Koyo Kegasa
Koyo Kegasa 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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Patent number: 10010991Abstract: The state measuring device includes a measurement section attached to the blade portion or to a vicinity of the blade portion to measure a state of the blade portion, an AD converter attached to the cutting tool to acquire a measurement value measured by the measurement section at a predetermined sampling rate and perform AD conversion on the measurement value, a transmission section which transmits, on each acquisition of the measurement value from the AD converter, the acquired measurement value using digital wireless communication, and a monitor device provided outside the cutting tool. The monitor device includes a reception section which receives the measurement value transmitted by the transmission section, and a data management section which causes a display section to display the measurement value and causes a storage section to store the measurement value on each reception of the measurement value by the reception section.Type: GrantFiled: September 4, 2014Date of Patent: July 3, 2018Assignee: Kobe Steel, Ltd.Inventors: Eiji Takahashi, Kaname Araki, Masato Kannaka, Koyo Kegasa, Katsuhiko Ozaki, Koichi Akazawa, Hiroyuki Kamura, Yuya Yamamoto
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Publication number: 20160303698Abstract: The state measuring device includes a measurement section attached to the blade portion or to a vicinity of the blade portion to measure a state of the blade portion, an AD converter attached to the cutting tool to acquire a measurement value measured by the measurement section at a predetermined sampling rate and perform AD conversion on the measurement value, a transmission section which transmits, on each acquisition of the measurement value from the AD converter, the acquired measurement value using digital wireless communication, and a monitor device provided outside the cutting tool. The monitor device includes a reception section which receives the measurement value transmitted by the transmission section, and a data management section which causes a display section to display the measurement value and causes a storage section to store the measurement value on each reception of the measurement value by the reception section.Type: ApplicationFiled: September 4, 2014Publication date: October 20, 2016Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Eiji TAKAHASHI, Kaname ARAKI, Masato KANNAKA, Koyo KEGASA, Katsuhiko OZAKI, Koichi AKAZAWA, Hiroyuki KAMURA, Yuya YAMAMOTO
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Publication number: 20090231100Abstract: The present invention provides a structure for attaching an RFID tag in a disposition allowing an easy detection by an external RFID reader, the structure preventing the RFID tag from being broken for a normal specification, and a method for detecting an RFID tag. The structure for attaching an RFID tag to a hollow cylindrical metal body is characterized in that the RFID tag is attached to an inner side of the hollow cylindrical metal body via a spacer between it and a metal surface such that a direction in which an electric field of the RFID tag is generated is in a direction along a circumference of the hollow cylindrical metal body.Type: ApplicationFiled: April 24, 2007Publication date: September 17, 2009Inventors: Koyo Kegasa, Chitaka Manabe, Naoki Tamura, Hidenori Sakai, Kouichi Matsuda, Yuichi Iwasa
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Publication number: 20090134941Abstract: The present invention provides a negative resistance input amplifier including: a microstrip line having one end connected to a collector of a transistor and the other end being open with a length of ¼ of a wavelength ? at a predetermined frequency f; and a microstrip line having one end connected to an emitter of the transistor and the other end grounded with a length of ¼ of the wavelength ? at the predetermined frequency f so that impedance viewed from a base of the transistor becomes negative only at around a target frequency, and an oscillator using the negative resistance input amplifier.Type: ApplicationFiled: February 2, 2006Publication date: May 28, 2009Inventors: Koyo Kegasa, Chitaka Manabe
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Patent number: 7492194Abstract: An oscillator includes phase frequency detectors, each detecting the phase difference between two input signals (output signal and external reference signal) and outputting a control command signal for controlling the output signal to achieve a desired frequency on the basis of the phase difference. A plurality of ICs, each including a phase frequency detector, frequency dividers, a charge pump, and a lock detection circuit, is operated in parallel. A composite control command signal generated by combining outputs of the phase frequency detectors is output via a loop filter to a voltage-controlled oscillator. Whether phase noise is reduced sufficiently is determined on the basis of detection results by an amplitude detection circuit for detecting the amplitude of an AC component of the composite control command signal and the lock detection circuits. The phase frequency detectors are repeatedly reactivated until the phase noise is reduced sufficiently.Type: GrantFiled: April 17, 2006Date of Patent: February 17, 2009Assignee: Kobe Steel, Ltd.Inventors: Koyo Kegasa, Chitaka Manabe
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Publication number: 20080309422Abstract: An oscillator according to the present invention includes: an active element that oscillates at a predetermined frequency to output a signal of the predetermined frequency; and an impedance element having an impedance that is lower at a frequency lower than the predetermined frequency than at the predetermined frequency, the active element having signal terminals at least one of which is grounded through a series circuit composed of the impedance element and a capacitor.Type: ApplicationFiled: May 22, 2006Publication date: December 18, 2008Applicant: KABUSHIKI KAISHA KOBE SEIKO SHOInventors: Koyo Kegasa, Chitaka Manabe
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Publication number: 20080037507Abstract: Existing modems of time division duplex (TDD) type can be utilized without modification to perform a high speed wireless communication with stable communication quality in other frequency bands such as quasi-millimeter to millimeter wave bands. There are included a circulator (11) connected to TDD modems (1, 2) and receives signals transmitted thereby to output those signals from a first connection terminal (p1) and outputs signals received at a second connection terminal (p2) to the TDD modems (1, 2), and a frequency converter (2a) that raise the frequency of the signals from the circulator (11) by a predetermined frequency width and lowers the frequency of signals from a receive antenna (32) by a predetermined frequency width.Type: ApplicationFiled: May 23, 2005Publication date: February 14, 2008Inventors: Yoshito Fukumoto, Chitaka Manabe, Yuichiro Goto, Hideo Ikeda, Koji Inoue, Koyo Kegasa
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Patent number: 7177591Abstract: In a frequency converter, a phase-locked loop generates a local-oscillation signal having a low frequency, of a plurality of local-oscillation signals having different frequencies, based on an intermediate frequency beacon signal that results from mixing a predetermined beacon signal with the local-oscillation frequency signal. Even if the phase-locked loop is used to generate the low frequency local-oscillation signal only, a frequency offset and a phase noise taking place in remaining high frequency local-oscillation signals are compensated for or canceled out. The frequency converter thus results in a high frequency accuracy. This arrangement reduces the number of bulky, costly and power-consuming phase-locked oscillators, typically used in the quasi millimeter band or the millimeter band. A simplified, compact frequency converter is thus provided, reducing both installation and operating costs.Type: GrantFiled: December 22, 2003Date of Patent: February 13, 2007Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Koyo Kegasa, Chitaka Manabe, Takuya Kusaka, Yuichiro Goto, Koji Inoue
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Publication number: 20060181354Abstract: An oscillator includes phase frequency detectors, each detecting the phase difference between two input signals (output signal and external reference signal) and outputting a control command signal for controlling the output signal to achieve a desired frequency on the basis of the phase difference. A plurality of ICs, each including a phase frequency detector, frequency dividers, a charge pump, and a lock detection circuit, is operated in parallel. A composite control command signal generated by combining outputs of the phase frequency detectors is output via a loop filter to a voltage-controlled oscillator. Whether phase noise is reduced sufficiently is determined on the basis of detection results by an amplitude detection circuit for detecting the amplitude of an AC component of the composite control command signal and the lock detection circuits. The phase frequency detectors are repeatedly reactivated until the phase noise is reduced sufficiently.Type: ApplicationFiled: April 17, 2006Publication date: August 17, 2006Inventors: Koyo Kegasa, Chitaka Manabe
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Patent number: 7061330Abstract: An oscillator includes phase frequency detectors, each detecting the phase difference between two input signals (output signal and external reference signal) and outputting a control command signal for controlling the output signal to achieve a desired frequency on the basis of the phase difference. A plurality of ICs, each including a phase frequency detector, frequency dividers, a charge pump, and a lock detection circuit, is operated in parallel. A composite control command signal generated by combining outputs of the phase frequency detectors is output via a loop filter to a voltage-controlled oscillator. Whether phase noise is reduced sufficiently is determined on the basis of detection results by an amplitude detection circuit for detecting the amplitude of an AC component of the composite control command signal and the lock detection circuits. The phase frequency detectors are repeatedly reactivated until the phase noise is reduced sufficiently.Type: GrantFiled: November 7, 2003Date of Patent: June 13, 2006Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Koyo Kegasa, Chitaka Manabe
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Publication number: 20040160280Abstract: An oscillator includes phase frequency detectors, each detecting the phase difference between two input signals (output signal and external reference signal) and outputting a control command signal for controlling the output signal to achieve a desired frequency on the basis of the phase difference. A plurality of ICs, each including a phase frequency detector, frequency dividers, a charge pump, and a lock detection circuit, is operated in parallel. A composite control command signal generated by combining outputs of the phase frequency detectors is output via a loop filter to a voltage-controlled oscillator. Whether phase noise is reduced sufficiently is determined on the basis of detection results by an amplitude detection circuit for detecting the amplitude of an AC component of the composite control command signal and the lock detection circuits. The phase frequency detectors are repeatedly reactivated until the phase noise is reduced sufficiently.Type: ApplicationFiled: November 7, 2003Publication date: August 19, 2004Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Koyo Kegasa, Chitaka Manabe
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Publication number: 20040131105Abstract: In a frequency converter, a phase-locked loop generates a local-oscillation signal having a low frequency, of a plurality of local-oscillation signals having different frequencies, based on an intermediate frequency beacon signal that results from mixing a predetermined beacon signal with the local-oscillation frequency signal. Even if the phase-locked loop is used to generate the low frequency local-oscillation signal only, a frequency offset and a phase noise taking place in remaining high frequency local-oscillation signals are compensated for or canceled out. The frequency converter thus results in a high frequency accuracy. This arrangement reduces the number of bulky, costly and power-consuming phase-locked oscillators, typically used in the quasi millimeter band or the millimeter band. A simplified, compact frequency converter is thus provided, reducing both installation and operating costs.Type: ApplicationFiled: December 22, 2003Publication date: July 8, 2004Applicant: Kobe Steel, Ltd.Inventors: Koyo Kegasa, Chitaka Manabe, Takuya Kusaka, Yuichiro Goto, Koji Inoue
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Patent number: 6724804Abstract: In a frequency converter, a phase-locked loop generates a local-oscillation signal having a low frequency, of a plurality of local-oscillation signals having different frequencies, based on an intermediate frequency beacon signal that results from mixing a predetermined beacon signal with the local-oscillation frequency signal. Even if the phase-locked loop is used to generate the low frequency local-oscillation signal only, a frequency offset and a phase noise taking place in remaining high frequency local-oscillation signals are compensated for or canceled out. The frequency converter thus results in a high frequency accuracy. This arrangement reduces the number of bulky, costly and power-consuming phase-locked oscillators, typically used in the quasi millimeter band or the millimeter band. A simplified, compact frequency converter is thus provided, reducing both installation and operating costs.Type: GrantFiled: July 12, 1999Date of Patent: April 20, 2004Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Koyo Kegasa, Chitaka Manabe, Takuya Kusaka, Yuichiro Goto, Koji Inoue
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Publication number: 20030197579Abstract: A high-frequency filter using a dielectric resonator includes an insulating substrate on which an input linear conductor and an output linear conductor are formed in parallel to each other, and a dielectric resonator which is coupled to the substrate. The dielectric resonator is arranged so that the direction of the center magnetic field of the dielectric resonator becomes approximately parallel to the substrate and becomes approximately at right angles to the linear conductors. With such an arrangement, a high-frequency filter, in which fine adjustment of a coupling factor and a resonance frequency is easy while maintaining Q of the dielectric resonator to be high, whose size can be reduced, and which can be mounted inexpensively is provided.Type: ApplicationFiled: April 17, 2003Publication date: October 23, 2003Applicant: Kabushiki Kaisha Kobe Seiko Sho.Inventors: Koyo Kegasa, Chitaka Manabe
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Patent number: 4940952Abstract: A phase and frequency detector circuit includes both a phase comparator such as an exclusive-OR gate possessing high phase sensitivity, and a frequency-phase comparator that is sensitive to differences in frequency. The outputs of these circuits are combined to provide a single output signal offering both frequency discrimination and sharp phase discrimination.Type: GrantFiled: November 7, 1988Date of Patent: July 10, 1990Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Koyo Kegasa
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Patent number: 4797637Abstract: A PLL frequency synthesizer comprises a voltage controlled oscillator which oscillates in response to a frequency signal corresponding to a control signal to be input and which outputs the frequency signal as an output of said PLL frequency synthesizer; a multiplier means for multiplying a reference frequency signal to be input; a mixer for mixing the frequency signal which is output from the voltage controlled oscillator and the multiplied reference frequency signal which is output from the multiplier, and for outputting a frequency signal representative of a difference therebetween; a variable frequency divider for dividing the difference frequency signal at a variable dividing ratio; a fixed frequency divider for dividing the reference frequency signal at a predetermined dividing ratio; a frequency phase comparator for detecting a phase difference between an output signal from the variable frequency divider and an output signal from the fixed frequency divider and for outputting a phase difference signal tType: GrantFiled: August 24, 1987Date of Patent: January 10, 1989Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Koyo Kegasa, Takafumi Murai, Osamu Yamanaka, Takeshi Fujii