Patents by Inventor Toru Ido

Toru Ido 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).

  • Publication number: 20180319933
    Abstract: Provided is a method to produce an alkylene oxide polymer having a high polymerization degree on an industrial scale and with high reproducibility. The method includes the step of carrying out a polymerization reaction of an alkylene oxide in an inert hydrocarbon solvent in the presence of a zinc catalyst to produce an alkylene oxide polymer. The zinc catalyst is produced by reaction of an organozinc compound with a monohydric alcohol in an amount of 12-fold equivalent or less relative to the amount of the organozinc compound and an aliphatic polyhydric alcohol in an amount of 0.2- to 1.1-fold equivalent relative to the amount of the organozinc compound. The polymerization reaction is carried out under such a condition that the amount of the monohydric alcohol in the polymerization reaction system becomes 0.01-fold equivalent or less relative to the amount of the organozinc compound.
    Type: Application
    Filed: July 16, 2018
    Publication date: November 8, 2018
    Inventors: Toru Ido, Noboru Yamaguchi
  • Publication number: 20180282513
    Abstract: An aqueous solution and an aqueous dispersion of a composition that contains a polyalkylene oxide, a phenolic antioxidant and a sulfur-containing amine compound are less likely to impair the stability of the polyalkylene oxide even in the case of containing an alkali. In the above composition, the content of each of the phenolic antioxidant and the sulfur-containing amine compound is preferably set to 0.001 to 5 parts by mass based on 100 parts by mass of the polyalkylene oxide, and the ratio of the sulfur-containing amine compound relative to 100 parts by mass of the phenolic antioxidant is preferably set to 20 to 200 parts by mass.
    Type: Application
    Filed: December 6, 2016
    Publication date: October 4, 2018
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Noboru YAMAGUCHI, Toru IDO, Amina TASHIRO
  • Patent number: 10070223
    Abstract: This application relates to circuitry for processing sense signals generated by MEMS capacitive transducers for compensating for distortion in such sense signals. The circuitry has a signal path between an input (204) for receiving the sense signal and an output (205) for outputting an output signal based on said sense signal. Compensation circuitry (206, 207) is configured to monitor the signal at a first point along the signal path and generate a correction signal (Scorr); and modify the signal at at least a second point along said signal path based on said correction signal. The correction signal is generated as a function of the value of the signal at the first point along the signal path so as to introduce compensation components into the output signal that compensate for distortion components in the sense signal. The first point in the signal path may be before or after the second point in the signal path.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: September 4, 2018
    Assignee: Cirrus Logic, Inc.
    Inventors: John Paul Lesso, Emmanuel Philippe Christian Hardy, James Thomas Deas, Toru Ido
  • Patent number: 10045124
    Abstract: This application describes methods and apparatus for mitigating the effects of crosstalk in multichannel audio. An audio driver circuit (200) for driving first and second audio loads (103) having a common return path (RC), has first and second signal paths (Left and Right). A crosstalk compensation block (205) is configured to add a first compensation signal to the first signal path and add a second compensation signal to the second signal path. The first compensation signal is generated based on the second audio signal and a first compensation function and the second compensation signal is generated based on the first audio signal and a second compensation function. Each of the first and second compensation functions is based on a predetermined impedance value for at least part of the common return path (RH1) and is also based on a determined DC impedance value (ZL, ZR) for one of the first and second audio loads which is modified by a band correction factor (?).
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: August 7, 2018
    Assignee: Cirrus Logic, Inc.
    Inventors: John Paul Lesso, Toru Ido
  • Publication number: 20180159490
    Abstract: This application relates to Class D amplifier circuits (200). A modulator (201) controls a Class D output stage (202) based on a modulator input signal (Dm) to generate an output signal (Vout) which is representative of an input signal (Din). An error block (205), which may comprise an ADC (207), generates an error signal (?) from the output signal and the input signal. In various embodiments the extent to which the error signal (?) contributes to the modulator input signal (Dm) is variable based on an indication of the amplitude of the input signal (Din). The error signal may be received at a first input (204) of a signal selector block (203). The input signal may be received at a second input (206) of the signal selector block (203).
    Type: Application
    Filed: February 1, 2018
    Publication date: June 7, 2018
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, Toru IDO
  • Patent number: 9899978
    Abstract: This application relates to Class D amplifier circuits (200). A modulator (201) controls a Class D output stage (202) based on a modulator input signal (Dm) to generate an output signal (Vout) which is representative of an input signal (Din). An error block (205), which may comprise an ADC (207), generates an error signal (?) from the output signal and the input signal. In various embodiments the extent to which the error signal (?) contributes to the modulator input signal (Dm) is variable based on an indication of the amplitude of the input signal (Din). The error signal may be received at a first input (204) of a signal selector block (203). The input signal may be received at a second input (206) of the signal selector block (203).
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: February 20, 2018
    Assignee: Cirrus Logic, Inc.
    Inventors: John Paul Lesso, Toru Ido
  • Publication number: 20170326398
    Abstract: The invention provides a drag reducer having an excellent frictional drag-reducing effect on an aqueous medium and the like and also provides a fire-extinguishing agent including this drag reducer. The drag reducer according to the present invention includes a polyalkylene oxide aqueous dispersion that includes a polyalkylene oxide, aluminum oxide, an electrolyte, and water, and that has the polyalkylene oxide dispersed therein. The drag reducer has an excellent frictional drag-reducing effect on an aqueous medium and the like.
    Type: Application
    Filed: December 2, 2015
    Publication date: November 16, 2017
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Toru IDO, Akira KIMURA, Noboru YAMAGUCHI, Amina TASHIRO
  • Patent number: 9787261
    Abstract: Methods and apparatus for Class-D amplifier circuits with improved power efficiency. The circuit has an output stage with at least first and second switches and a modulator that receives an input signal to be amplified, SIN, and a first clock signal fSW. The modulator controls the duty cycles of the first and second switches, within a switching cycle based on the input signal, wherein the switching cycle has a switching frequency based on the first clock signal. A frequency controller controls the frequency of the first clock signal in response to an indication of the amplitude of the input signal so as to provide a first switching frequency at a first input signal amplitude and a second, lower, switching frequency at a second, lower, input signal amplitude. A lower switching frequency can be tolerated at low signal amplitudes and varying the switching frequency in this way thus maintains stability while reducing switching power losses.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: October 10, 2017
    Assignee: Cirrus Logic, Inc.
    Inventors: John P. Lesso, Toru Ido
  • Publication number: 20170284825
    Abstract: This application relates to circuitry for processing sense signals generated by MEMS capacitive transducers for compensating for distortion in such sense signals. The circuitry has a signal path between an input (204) for receiving the sense signal and an output (205) for outputting an output signal based on said sense signal. Compensation circuitry (206, 207) is configured to monitor the signal at a first point along the signal path and generate a correction signal (Scorr); and modify the signal at at least a second point along said signal path based on said correction signal. The correction signal is generated as a function of the value of the signal at the first point along the signal path so as to introduce compensation components into the output signal that compensate for distortion components in the sense signal. The first point in the signal path may be before or after the second point in the signal path.
    Type: Application
    Filed: June 20, 2017
    Publication date: October 5, 2017
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, Emmanuel Philippe Christian HARDY, James Thomas DEAS, Toru IDO
  • Patent number: 9716945
    Abstract: This application relates to circuitry for processing sense signals generated by MEMS capacitive transducers for compensating for distortion in such sense signals. The circuitry has a signal path between an input (204) for receiving the sense signal and an output (205) for outputting an output signal based on said sense signal. Compensation circuitry (206, 207) is configured to monitor the signal at a first point along the signal path and generate a correction signal (Scorr); and modify the signal at at least a second point along said signal path based on said correction signal. The correction signal is generated as a function of the value of the signal at the first point along the signal path so as to introduce compensation components into the output signal that compensate for distortion components in the sense signal. The first point in the signal path may be before or after the second point in the signal path.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: July 25, 2017
    Assignee: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul Lesso, Emmanuel Philippe Christian Hardy, James Thomas Deas, Toru Ido
  • Publication number: 20170194926
    Abstract: This application relates to Class D amplifier circuits (200). A modulator (201) controls a Class D output stage (202) based on a modulator input signal (Dm) to generate an output signal (Vout) which is representative of an input signal (Din). An error block (205), which may comprise an ADC (207), generates an error signal (?) from the output signal and the input signal. In various embodiments the extent to which the error signal (?) contributes to the modulator input signal (Dm) is variable based on an indication of the amplitude of the input signal (Din). The error signal may be received at a first input (204) of a signal selector block (203). The input signal may be received at a second input (206) of the signal selector block (203).
    Type: Application
    Filed: March 22, 2017
    Publication date: July 6, 2017
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, Toru IDO
  • Publication number: 20170180859
    Abstract: This application describes methods and apparatus for mitigating the effects of crosstalk in multichannel audio. An audio driver circuit (200) for driving first and second audio loads (103) having a common return path (RC), has first and second signal paths (Left and Right). A crosstalk compensation block (205) is configured to add a first compensation signal to the first signal path and add a second compensation signal to the second signal path. The first compensation signal is generated based on the second audio signal and a first compensation function and the second compensation signal is generated based on the first audio signal and a second compensation function. Each of the first and second compensation functions is based on a predetermined impedance value for at least part of the common return path (RH1) and is also based on a determined DC impedance value (ZL, ZR) for one of the first and second audio loads which is modified by a band correction factor (?).
    Type: Application
    Filed: December 15, 2016
    Publication date: June 22, 2017
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul LESSO, Toru IDO
  • Patent number: 9628040
    Abstract: This application relates to Class D amplifier circuits (200). A modulator (201) controls a Class D output stage (202) based on a modulator input signal (Dm) to generate an output signal (Vout) which is representative of an input signal (Din). An error block (205), which may comprise an ADC (207), generates an error signal (?) from the output signal and the input signal. In various embodiments the extent to which the error signal (?) contributes to the modulator input signal (Dm) is variable based on an indication of the amplitude of the input signal (Din). The error signal may be received at a first input (204) of a signal selector block (203). The input signal may be received at a second input (206) of the signal selector block (203).
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: April 18, 2017
    Assignee: Cirrus Logic International Semiconductor Ltd.
    Inventors: John Paul Lesso, Toru Ido
  • Publication number: 20170096527
    Abstract: Provided is an alkylene oxide polymer production method, whereby it becomes possible to produce an alkylene oxide polymer having a high polymerization degree on an industrial scale and with high reproducibility. An alkylene oxide polymer production method comprising carrying out a polymerization reaction of an alkylene oxide in an inert hydrocarbon solvent in the presence of a zinc catalyst to produce an alkylene oxide polymer, wherein the zinc catalyst is produced by reacting an organozinc compound with a monohydric alcohol in an amount of 12-fold equivalent or less relative to the amount of the organozinc compound and an aliphatic polyhydric alcohol in an amount of 0.2- to 1.1-fold equivalent relative to the amount of the organozinc compound, and the polymerization reaction is carried out under such a condition that the amount of the monohydric alcohol in the polymerization reaction system becomes 0.01-fold equivalent or less relative to the amount of the organozinc compound.
    Type: Application
    Filed: February 12, 2015
    Publication date: April 6, 2017
    Inventors: Toru Ido, Noboru Yamaguchi
  • Publication number: 20170019079
    Abstract: Methods and apparatus for Class-D amplifier circuits with improved power efficiency. The circuit has an output stage with at least first and second switches and a modulator that receives an input signal to be amplified, SIN, and a first clock signal fSW. The modulator controls the duty cycles of the first and second switches, within a switching cycle based on the input signal, wherein the switching cycle has a switching frequency based on the first clock signal. A frequency controller controls the frequency of the first clock signal in response to an indication of the amplitude of the input signal so as to provide a first switching frequency at a first input signal amplitude and a second, lower, switching frequency at a second, lower, input signal amplitude. A lower switching frequency can be tolerated at low signal amplitudes and varying the switching frequency in this way thus maintains stability whilst reducing switching power losses.
    Type: Application
    Filed: September 28, 2016
    Publication date: January 19, 2017
    Inventors: John P. Lesso, Toru Ido
  • Patent number: 9473087
    Abstract: Methods and apparatus for Class-D amplifier circuits with improved power efficiency. The circuit has an output stage with at least first and second switches and a modulator that receives an input signal to be amplified, SIN, and a first clock signal fSW. The modulator controls the duty cycles of the first and second switches, within a switching cycle based on the input signal, wherein the switching cycle has a switching frequency based on the first clock signal. A frequency controller controls the frequency of the first clock signal in response to an indication of the amplitude of the input signal so as to provide a first switching frequency at a first input signal amplitude and a second, lower, switching frequency at a second, lower, input signal amplitude. A lower switching frequency can be tolerated at low signal amplitudes and varying the switching frequency in this way thus maintains stability whilst reducing switching power losses.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: October 18, 2016
    Assignee: Cirrus Logic, Inc.
    Inventors: John Paul Lesso, Toru Ido
  • Patent number: 9447237
    Abstract: The present invention relates to a production method of polyalkylene oxide particles including a step of forming the polyalkylene oxide particles by polymerization of an alkylene oxide in a polymerization solution containing a polymerization solvent and a catalyst dispersed in the polymerization solvent. The average particle diameter of the catalyst is 25 ?m or less.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: September 20, 2016
    Assignee: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Makoto Kato, Toru Ido, Shizuka Hachiken
  • Patent number: 9416226
    Abstract: The present invention relates to a production method of polyalkylene oxide particles including a step of forming the polyalkylene oxide particles by polymerization of an alkylene oxide in a polymerization solution containing a polymerization solvent and a catalyst dispersed in the polymerization solvent. The average particle diameter of the catalyst is more than 25 ?m.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: August 16, 2016
    Assignee: Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Makoto Kato, Toru Ido, Shizuka Hachiken
  • Publication number: 20160157017
    Abstract: This application relates to circuitry for processing sense signals generated by MEMS capacitive transducers for compensating for distortion in such sense signals. The circuitry has a signal path between an input (204) for receiving the sense signal and an output (205) for outputting an output signal based on said sense signal. Compensation circuitry (206, 207) is configured to monitor the signal at a first point along the signal path and generate a correction signal (Scorr); and modify the signal at at least a second point along said signal path based on said correction signal. The correction signal is generated as a function of the value of the signal at the first point along the signal path so as to introduce compensation components into the output signal that compensate for distortion components in the sense signal. The first point in the signal path may be before or after the second point in the signal path.
    Type: Application
    Filed: April 23, 2014
    Publication date: June 2, 2016
    Inventors: John Paul Lesso, Emmanuel Philippe Christian Hardy, James Thomas Deas, Toru Ido
  • Publication number: 20160115374
    Abstract: A fracturing fluid viscosity-controlling agent is described. The fracturing fluid viscosity-controlling agent is capable of maintaining the high viscosity of the fracturing fluid during fracture formation in hydraulic fracturing and of reducing the viscosity during recovery of the fracturing fluid. A fracturing fluid which includes the viscosity-controlling agent is provided as well as a crude oil or natural gas drilling method using the fracturing fluid with the viscosity-controlling agent. This viscosity-controlling agent contains polyalkylene oxide and a viscosity-reducing agent and is in the form of a tablet.
    Type: Application
    Filed: June 9, 2014
    Publication date: April 28, 2016
    Inventors: Toru Ido, Noboru Yamaguchi