Patents by Inventor Ken Mochizuki
Ken Mochizuki 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: 20240082559Abstract: A connector (50) includes a tubular member (52) and a base tube (58). A light-guiding tube (60) is drawn out from the base tube (58) toward the opposite side to the tubular member (52). An adapter (1) includes: a first connecting portion (10) that can be connected to and disconnected from a light source device (70); a second connecting portion (20) that can be connected to and disconnected from the connector (50); and a light-guiding member (30) that guides light emitted from the light source device (70) to a proximal end surface (61) of the tube (60).Type: ApplicationFiled: January 7, 2022Publication date: March 14, 2024Inventors: Takehiko YUKI, Masaya MUTSUKADO, Ken KANDA, Koichiro TOYOTA, Masahiro KINOSHITA, Osuke IWATA, Manabu MOCHIZUKI, Yasuo IMAMURA
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Patent number: 10234483Abstract: A frequency synthesizer 11a outputs a periodic signal r(t) at a frequency detuned by a predetermined frequency ?f [Hz] from a frequency of 1/integer of a frequency of a reference clock signal f0 synchronized with a signal to be measured ws. A first sampler unit 12 samples the signal to be measured ws at a timing of the trigger signal CLK. A second sampler unit 13a samples an I signal I(t) at the timing of the trigger signal CLK. A phase shifter 13b outputs a Q signal Q(t) obtained by shifting a phase of the reference clock signal f0 by 90°. A third sampler unit 13c samples the Q signal at the timing of the trigger signal CLK. A correction value calculation unit 13d calculates a correction value ?t(n) based on sampling data I(n) and Q(n) and a set value t(n) of a sampling time.Type: GrantFiled: March 28, 2016Date of Patent: March 19, 2019Assignee: ANRITSU CORPORATIONInventors: Ken Mochizuki, Takashi Murakami, Seiya Suzuki
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Publication number: 20160363614Abstract: A frequency synthesizer 11a outputs a periodic signal r(t) at a frequency detuned by a predetermined frequency ?f [Hz] from a frequency of 1/integer of a frequency of a reference clock signal f0 synchronized with a signal to be measured ws. A first sampler unit 12 samples the signal to be measured ws at a timing of the trigger signal CLK. A second sampler unit 13a samples an I signal I(t) at the timing of the trigger signal CLK. A phase shifter 13b outputs a Q signal Q(t) obtained by shifting a phase of the reference clock signal f0 by 90°. A third sampler unit 13c samples the Q signal at the timing of the trigger signal CLK. A correction value calculation unit 13d calculates a correction value ?t(n) based on sampling data I(n) and Q(n) and a set value t(n) of a sampling time.Type: ApplicationFiled: March 28, 2016Publication date: December 15, 2016Inventors: Ken Mochizuki, Takashi Murakami, Seiya Suzuki
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Patent number: 8855182Abstract: In an emphasis optimization device, a calculating unit calculates an inverse characteristic of an amplitude characteristic based on the amplitude characteristic of a transmission path, and an inverse Fourier transform unit performs an inverse Fourier transform on the inverse characteristic to obtain an impulse response. An extracting unit extracts, from the obtained impulse response, an impulse response corresponding to the number of taps necessary for emphasis to be added to a digital signal to be transmitted on the transmission path. An emphasis amount calculating unit converts the extracted impulse response into a value of the emphasis to calculate an emphasis amount.Type: GrantFiled: March 14, 2013Date of Patent: October 7, 2014Assignee: Anritsu CorporationInventors: Takashi Murakami, Kosuke Sasaki, Ken Mochizuki
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Publication number: 20130251015Abstract: In an emphasis optimization device, a calculating unit calculates an inverse characteristic of an amplitude characteristic based on the amplitude characteristic of a transmission path, and an inverse Fourier transform unit performs an inverse Fourier transform on the inverse characteristic to obtain an impulse response. An extracting unit extracts, from the obtained impulse response, an impulse response corresponding to the number of taps necessary for emphasis to be added to a digital signal to be transmitted on the transmission path. An emphasis amount calculating unit converts the extracted impulse response into a value of the emphasis to calculate an emphasis amount.Type: ApplicationFiled: March 14, 2013Publication date: September 26, 2013Applicant: Anritsu CorporationInventors: Takashi MURAKAMI, Kosuke SASAKI, Ken MOCHIZUKI
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Patent number: 8432958Abstract: An apparatus for rapidly measuring jitter transfer characteristics is provided. A modulation signal generator generates a modulation signal M including a plurality of sinusoidal components having known amplitudes m1 to mn and different frequencies f1 to fn, and outputs the modulation signal M to a jitter generator. A clock signal C phase-modulated by the modulation signal M is input to a data signal generator, a data signal D synchronized with the clock signal C is provided to a measurement object, a data signal D? output from the measurement object is input to a clock recovery unit to recover a clock signal component C?, and the clock signal component C? is phase-detected by a phase detector.Type: GrantFiled: January 21, 2010Date of Patent: April 30, 2013Assignee: Anritsu CorporationInventors: Seiya Suzuki, Takashi Aoki, Ken Mochizuki
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Patent number: 8208586Abstract: It is an object of the invention to correctly display the waveform of a demodulation signal with a single apparatus. A jitter demodulator which demodulates a jitter component of a digital signal input from the outside, a jitter amount detector which detects the amplitude value of a demodulation signal output from the jitter demodulator, an interpolator which measures a period of the demodulation signal output from the jitter demodulator and interpolates the demodulation signal processing with a rate corresponding to the measured period, a display unit, and a display control section which displays on the display unit the value detected by the jitter amount detector and a waveform of the demodulation signal interpolated by the interpolator are provided in a single housing.Type: GrantFiled: March 24, 2010Date of Patent: June 26, 2012Assignee: Anritsu CorporationInventors: Naosuke Tsuchiya, Ken Mochizuki, Seiya Suzuki
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Publication number: 20100316105Abstract: An apparatus for rapidly measuring jitter transfer characteristics is provided. A modulation signal generator generates a modulation signal M including a plurality of sinusoidal components having known amplitudes m1 to mn and different frequencies f1 to fn, and outputs the modulation signal M to a jitter generator. A clock signal C phase-modulated by the modulation signal M is input to a data signal generator, a data signal D synchronized with the clock signal C is provided to a measurement object, a data signal D? output from the measurement object is input to a clock recovery unit to recover a clock signal component C?, and the clock signal component C? is phase-detected by a phase detector.Type: ApplicationFiled: January 21, 2010Publication date: December 16, 2010Applicant: ANRITSU CORPORATIONInventors: Seiya Suzuki, Takashi Aoki, Ken Mochizuki
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Publication number: 20100246655Abstract: It is an object of the invention to correctly display the waveform of a demodulation signal with a single apparatus. A jitter demodulator which demodulates a jitter component of a digital signal input from the outside, a jitter amount detector which detects the amplitude value of a demodulation signal output from the jitter demodulator, an interpolator which measures a period of the demodulation signal output from the jitter demodulator and interpolates the demodulation signal processing with a rate corresponding to the measured period, a display unit, and a display control section which displays on the display unit the value detected by the jitter amount detector and a waveform of the demodulation signal interpolated by the interpolator are provided in a single housing.Type: ApplicationFiled: March 24, 2010Publication date: September 30, 2010Inventors: Naosuke Tsuchiya, Ken Mochizuki, Seiya Suzuki
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Patent number: 7574311Abstract: In order to stably measure an input interval time of a pulse signal with high precision, a time interval measuring apparatus includes a reference signal generator, a phase shifter, first and second A/D converters, an error correction unit, an instantaneous phase calculation unit, and an interval time calculation unit. The phase shifter divides a reference signal of a sine wave having a predetermined frequency from the reference signal generator into a first analog signal and a second analog signal having phases shifted to each other. The first and second A/D converters perform sampling of the first analog signal and the second analog signal from the phase shifter, respectively, at an input timing of a pulse signal to be measured, and output a first and second digital sample values.Type: GrantFiled: June 16, 2006Date of Patent: August 11, 2009Assignee: Anritsu CorporationInventors: Ken Mochizuki, Osamu Sugiyama, Tadanori Nishikobara
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Patent number: 7450633Abstract: A wander generator has a random number signal generator unit, a filter unit, a clock generator unit, a modulator unit, and a setting unit. The random number generator unit sequentially generates random number signals comprised of a plurality of bits at a constant speed in accordance with a predetermined algorithm. The filter unit receives a random number signal sequence generated by the random number signal generator unit for filtering. The clock generator unit generates a clock signal. The modulator unit modulates the frequency of clock signal generated by the clock generator unit with a signal output from the filter unit. The setting unit applies the filter unit with a signal for setting each amplitude value of a spectrum of a signal sequence output from the filter unit.Type: GrantFiled: March 7, 2007Date of Patent: November 11, 2008Assignee: Anritsu CorporationInventors: Masaharu Uchino, Kazuhiko Ishibe, Takashi Aoki, Ken Mochizuki
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Publication number: 20080172194Abstract: In order to stably measure an input interval time of a pulse signal with high precision, a time interval measuring apparatus includes a reference signal generator, a phase shifter, first and second A/D converters, an error correction unit, an instantaneous phase calculation unit, and an interval time calculation unit. The phase shifter divides a reference signal of a sine wave having a predetermined frequency from the reference signal generator into a first analog signal and a second analog signal having phases shifted to each other. The first and second A/D converters perform sampling of the first analog signal and the second analog signal from the phase shifter, respectively, at an input timing of a pulse signal to be measured, and output a first and second digital sample values.Type: ApplicationFiled: June 16, 2006Publication date: July 17, 2008Applicant: ANRITSU CORPORATIONInventors: Ken Mochizuki, Osamu Sugiyama, Tadanori Nishikobara
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Publication number: 20070286322Abstract: A wander generator has a random number signal generator unit, a filter unit, a clock generator unit, a modulator unit, and a setting unit. The random number generator unit sequentially generates random number signals comprised of a plurality of bits at a constant speed in accordance with a predetermined algorithm. The filter unit receives a random number signal sequence generated by the random number signal generator unit for filtering. The clock generator unit generates a clock signal. The modulator unit modulates the frequency of clock signal generated by the clock generator unit with a signal output from the filter unit. The setting unit applies the filter unit with a signal for setting each amplitude value of a spectrum of a signal sequence output from the filter unit.Type: ApplicationFiled: March 7, 2007Publication date: December 13, 2007Applicant: Anritsu CorporationInventors: Masaharu Uchino, Kazuhiko Ishibe, Takashi Aoki, Ken Mochizuki
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Patent number: 7248981Abstract: An orthogonal signal generating unit converts a signal to be measured into two orthogonal signals which are two signals whose phases are orthogonal to one another. An instantaneous phase calculating unit calculates an instantaneous phase based on the two orthogonal signals within a range between a lower limit phase value set in advance and an upper limit phase value set in advance. A differential value detecting unit detects a differential value of the instantaneous phase. A differential value correcting unit corrects the differential value, and outputs a corrected differential value when the differential value of the instantaneous phase is over the range dependent on the lower limit phase value and the upper limit phase value.Type: GrantFiled: October 29, 2004Date of Patent: July 24, 2007Assignee: Anritsu CorporationInventor: Ken Mochizuki
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Patent number: 7206339Abstract: A wander generator has a random number signal generator unit, a filter unit, a clock generator unit, a modulator unit, and a setting unit. The random number generator unit sequentially generates random number signals comprised of a plurality of bits at a constant speed in accordance with a predetermined algorithm. The filter unit receives a random number signal sequence generated by the random number signal generator unit for filtering. The clock generator unit generates a clock signal. The modulator unit modulates the frequency of clock signal generated by the clock generator unit with a signal output from the filter unit. The setting unit applies the filter unit with a signal for setting each amplitude value of a spectrum of a signal sequence output from the filter unit.Type: GrantFiled: December 22, 2000Date of Patent: April 17, 2007Assignee: Anritsu CorporationInventors: Masaharu Uchino, Takashi Aoki, Ken Mochizuki
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Publication number: 20060064258Abstract: An orthogonal signal generating unit converts a signal to be measured into two orthogonal signals which are two signals whose phases are orthogonal to one another. An instantaneous phase calculating unit calculates an instantaneous phase based on the two orthogonal signals within a range between a lower limit phase value set in advance and an upper limit phase value set in advance. A differential value detecting unit detects a differential value of the instantaneous phase. A differential value correcting unit corrects the differential value, and outputs a corrected differential value when the differential value of the instantaneous phase is over the range dependent on the lower limit phase value and the upper limit phase value.Type: ApplicationFiled: October 29, 2004Publication date: March 23, 2006Inventor: Ken Mochizuki
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Patent number: 6972603Abstract: An MTIE test signal generating apparatus generates a predetermined MTIE test signal. An MTIE measuring unit includes a low-pass measuring filter having a predetermined high-cut characteristic. A cycle-amplitude setting portion sets a cycle corresponding to an observation time of each of desired plural specific points for a predetermined MTIE characteristic and an amplitude corresponding to a difference in the MTIE value between adjacent specific points. Plural signal generating portions generate plural signals each having the cycle and the amplitude having repetitive waveforms and then outputting to each of the desired plural specific points. A holding time setting portion sets a holding time for holding the upper and lower limit values of the repetitive waveforms over the predetermined time so that a signal cycle having at least the shortest cycle of the plural signals is longer than a predetermined time corresponding to the predetermined high-cut characteristic of the low-pass measuring filter.Type: GrantFiled: October 7, 2003Date of Patent: December 6, 2005Assignee: Anritsu CorporationInventors: Ken Mochizuki, Osamu Sugiyama
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Publication number: 20040088620Abstract: An MTIE test signal generating apparatus generates a predetermined MTIE test signal. An MTIE measuring unit includes a low-pass measuring filter having a predetermined high-cut characteristic. A cycle-amplitude setting portion sets a cycle corresponding to an observation time of each of desired plural specific points for a predetermined MTIE characteristic and an amplitude corresponding to a difference in the MTIE value between adjacent specific points. Plural signal generating portions generate plural signals each having the cycle and the amplitude having repetitive waveforms and then outputting to each of the desired plural specific points. A holding time setting portion sets a holding time for holding the upper and lower limit values of the repetitive waveforms over the predetermined time so that a signal cycle having at least the shortest cycle of the plural signals is longer than a predetermined time corresponding to the predetermined high-cut characteristic of the low-pass measuring filter.Type: ApplicationFiled: October 7, 2003Publication date: May 6, 2004Applicant: Anritsu CorporationInventors: Ken Mochizuki, Osamu Sugiyama
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Patent number: 4642127Abstract: A method and an apparatus for cooling blast furnace gas for use in a blast furnace gas treating system having incorporated therein a coarse particle removing unit having a dust collecting box. Nozzles extend through the box as arranged circumferentially thereof at a plurality of locations for injecting a cooling fluid into the unit without wetting the inner wall thereof. Since the unit which has a large capacity is used also as a cooling container, a large quantity of cooling fluid can be injected to effectively cool the blast furnace gas even when the gas has a considerably high temperature. The system can be constructed at a low cost without necessitating any additional cooling container.Type: GrantFiled: May 20, 1985Date of Patent: February 10, 1987Assignees: Sumitomo Metal Industries, Ltd., Hitachi Shipbuilding & Engineering Company LimitedInventors: Takehiro Ando, Hideo Kimura, Noriyuki Oda, Takeji Asai, Ken Mochizuki, Toshihisa Fujihara, Katsuji Maeda