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: 20160083670
    Abstract: A water-soluble metal working oil agent which can be prevented from being scattered in the form of mists for a long period when used for the cutting processing, grinding processing and the like of metallic materials is provided. A method for producing the water-soluble metal working oil agent is described. The water-soluble metal working oil agent includes a polyalkylene oxide having a weight average molecular weight of 100,000 to 1,000,000 and water.
    Type: Application
    Filed: December 18, 2013
    Publication date: March 24, 2016
    Inventors: Toru IDO, Makiko KAWANO, Makoto KATOU
  • Publication number: 20160065158
    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: August 26, 2015
    Publication date: March 3, 2016
    Inventors: John Paul Lesso, Toru Ido
  • Patent number: 9199901
    Abstract: A method for producing a medium-molecular weight polyalkylene oxide having a viscosity-average molecular weight of from 100,000 to 2,500,000, including heat-treating a polyalkylene oxide having a viscosity-average molecular weight of 3,000,000 or more at a temperature of from 30° to 70° C. in an aliphatic hydrocarbon solvent having a dissolved oxygen concentration of 0.5 mg/L or more, in the presence of a radical initiator in an amount of from 0.001 to 1 part by mass, based on 100 parts by mass of the polyalkylene oxide, and thereafter adding an antioxidant to a mixture in an amount of from 0.001 to 5 parts by mass, based on 100 parts by mass of the polyalkylene oxide to remove the solvent. According to the method of the present invention, a medium-molecular weight polyalkylene oxide having a viscosity-average molecular weight of from 100,000 to 2,500,000 which has excellent storage stability can be industrially obtained without subjecting to a gamma-ray irradiation treatment.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: December 1, 2015
    Assignee: Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Makoto Katou, Toru Ido, Masahiro Gotou
  • Publication number: 20150141705
    Abstract: A method for producing a medium-molecular weight polyalkylene oxide having a viscosity-average molecular weight of from 100,000 to 2,500,000, including heat-treating a polyalkylene oxide having a viscosity-average molecular weight of 3,000,000 or more at a temperature of from 30° to 70° C. in an aliphatic hydrocarbon solvent having a dissolved oxygen concentration of 0.5 mg/L or more, in the presence of a radical initiator in an amount of from 0.001 to 1 part by mass, based on 100 parts by mass of the polyalkylene oxide, and thereafter adding an antioxidant to a mixture in an amount of from 0.001 to 5 parts by mass, based on 100 parts by mass of the polyalkylene oxide to remove the solvent. According to the method of the present invention, a medium-molecular weight polyalkylene oxide having a viscosity-average molecular weight of from 100,000 to 2,500,000 which has excellent storage stability can be industrially obtained without subjecting to a gamma-ray irradiation treatment.
    Type: Application
    Filed: November 22, 2012
    Publication date: May 21, 2015
    Applicant: Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Makoto Katou, Toru Ido, Masahiro Gotou
  • Publication number: 20150109056
    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: October 22, 2014
    Publication date: April 23, 2015
    Applicant: Wolfson Microelectronics plc
    Inventors: John Paul Lesso, Toru Ido
  • Publication number: 20140120349
    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: Application
    Filed: May 21, 2012
    Publication date: May 1, 2014
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Makoto Kato, Toru Ido, Shizuka Hachiken
  • Publication number: 20140106171
    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: Application
    Filed: May 21, 2012
    Publication date: April 17, 2014
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Makoto Kato, Toru Ido, Shizuka Hachiken
  • Patent number: 7932711
    Abstract: A voltage supply circuit and a circuit device can reduce the noise in the output of the circuit when the power to the circuit is turned on and off and can shorten the time required to start or stop the operation of the circuit. When the supply of power to signal processing part 10 is started or stopped, reference voltage Vref supplied to signal processing part 10 is varied continuously to reduce the high-frequency noise in the output of signal processing part 10. Also, when the setpoint value of the waveform of reference voltage Vref is generated by digital signal processing in voltage setting part 30, the desired waveform can be generated without being limited by the values of the circuit elements or the circuit configuration. The output noise of signal processing part 10 can be reduced, and the time that reference time Vref varies can be shortened.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: April 26, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Soichiro Ishizuka, Toru Ido, Naoki Furuya, Takeshi Anzai
  • Patent number: 7932779
    Abstract: A D-class amplifier that can suppress noise generated when a D-class amplification operation is started/stopped. When a D-class amplification operation is started/stopped, the pulse widths and pulse interval of output signals Pout1, Pout2 are gradually changed, so it is possible to prevent a large variation in the signal fed as a differential signal of output signals Pout1, Pout2 to the load, and it is possible to reduce noise. That is, by gradually changing the pulse interval while keeping the pulse widths of output signals Pout1, Pout2 constant, it is possible to suppress variation in the relatively high frequency component corresponding to the component of the pulse signal. Also, by gradually changing the widths of output signals Pout1, Pout2 while keeping the pulse interval constant, it is possible to suppress variation in the relatively low frequency component corresponding to the average value of the pulse signal.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: April 26, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Toru Ido, Soichiro Ishizuka
  • Publication number: 20090302942
    Abstract: A D-class amplifier that can suppress noise generated when a D-class amplification operation is started/stopped. When a D-class amplification operation is started/stopped, the pulse widths and pulse interval of output signals Pout1, Pout2 are gradually changed, so it is possible to prevent a large variation in the signal fed as a differential signal of output signals Pout1, Pout2 to the load, and it is possible to reduce noise. That is, by gradually changing the pulse interval while keeping the pulse widths of output signals Pout1, Pout2 constant, it is possible to suppress variation in the relatively high frequency component corresponding to the component of the pulse signal. Also, by gradually changing the widths of output signals Pout1, Pout2 while keeping the pulse interval constant, it is possible to suppress variation in the relatively low frequency component corresponding to the average value of the pulse signal.
    Type: Application
    Filed: April 14, 2008
    Publication date: December 10, 2009
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Toru Ido, Soichiro Ishizuka
  • Patent number: 7623055
    Abstract: A weight level generator is provided. Weight level generator W has plural weight generators 5-1-5-j. At least one of said plural weight generators is used at at least two different time rates. Also, a digital-to-analog converter (DAC) using said weight generators is equipped with a digital signal source, a weight controller, and a weight generator.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: November 24, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Toru Ido, Soichiro Ishizuka
  • Patent number: 7557744
    Abstract: The objective of the invention is to provide a class D amplifier that can reduce aliasing noise. The class D amplifier has D/A converter 10 that operates at the first sampling frequency, and PWM driver 3 that receives the output from D/A converter 10. Said PWM driver 3 operates at the second sampling frequency synchronized to the first sampling frequency. The second sampling frequency can be correlated to the delta wave frequency of the PWM driver. Also, synchronization of said first sampling frequency and said second sampling frequency can be carried out with one of said frequencies being an integer multiple of the other.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: July 7, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Toru Ido, Soichiro Ishizuka
  • Patent number: 7511647
    Abstract: The invention provides an improved dynamic element matching (DEM) device. The DEM device performs dynamic element matching processing at a second timing rate different from the first timing rate for the digital input. As an embodiment, the DEM device is composed of encoder 10 and feedback circuit 12. Said encoder 10 has two inputs and one output. Of the two inputs, one receives the digital input as the object for the DEM processing, and the other input receives the output of feedback circuit 12. Then, the digital output of the encoded result is generated. Said feedback circuit 12 has sampling rate converter 120 and loop filter 122 in order to perform DEM processing at a timing rate different from the timing rate for the digital input as the DEM processing object.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: March 31, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Toru Ido, Soichiro Ishizuka
  • Publication number: 20080174362
    Abstract: A voltage supply circuit and a circuit device can reduce the noise in the output of the circuit when the power to the circuit is turned on and off and can shorten the time required to start or stop the operation of the circuit. When the supply of power to signal processing part 10 is started or stopped, reference voltage Vref supplied to signal processing part 10 is varied continuously to reduce the high-frequency noise in the output of signal processing part 10. Also, when the setpoint value of the waveform of reference voltage Vref is generated by digital signal processing in voltage setting part 30, the desired waveform can be generated without being limited by the values of the circuit elements or the circuit configuration. The output noise of signal processing part 10 can be reduced, and the time that reference time Vref varies can be shortened.
    Type: Application
    Filed: December 21, 2007
    Publication date: July 24, 2008
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Soichiro Ishizuka, Toru Ido, Naoki Furuya, Takeshi Anzai
  • Publication number: 20070279271
    Abstract: A weight level generator is provided. Weight level generator W has plural weight generators 5-1-5-j. At least one of said plural weight generators is used at at least two different time rates. Also, a digital-to-analog converter (DAC) using said weight generators is equipped with a digital signal source, a weight controller, and a weight generator.
    Type: Application
    Filed: April 5, 2007
    Publication date: December 6, 2007
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Toru Ido, Soichiro Ishizuka
  • Publication number: 20070252743
    Abstract: The invention provides an improved dynamic element matching (DEM) device. The DEM device performs dynamic element matching processing at a second timing rate different from the first timing rate for the digital input. As an embodiment, the DEM device is composed of encoder 10 and feedback circuit 12. Said encoder 10 has two inputs and one output. Of the two inputs, one receives the digital input as the object for the DEM processing, and the other input receives the output of feedback circuit 12. Then, the digital output of the encoded result is generated. Said feedback circuit 12 has sampling rate converter 120 and loop filter 122 in order to perform DEM processing at a timing rate different from the timing rate for the digital input as the DEM processing object.
    Type: Application
    Filed: April 5, 2007
    Publication date: November 1, 2007
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Toru Ido, Soichiro Ishizuka
  • Patent number: 7215271
    Abstract: Transient response generating circuit A has a first circuit 3 that generates transient response OUT1 in a first polarity direction, a second circuit 4 that generates transient response OUT2 in a second polarity direction opposite to the first polarity, and a transient response synthesizing circuit 6 that combines the transient response OUT1 in the first polarity direction and the transient response OUT2 in the second polarity direction to generate composite transient response OUTC.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: May 8, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Toru Ido, Soichiro Ishizuka
  • Publication number: 20070024364
    Abstract: An amplifier having an increased the upper limit on the amplitude of an audio signal generated between one common terminal and the output terminals of left and right channels without raising the power supply voltage. The level at common terminal C is changed corresponding to the average of the input audio signals (ViL, ViR) to increase the amplitudes of the output audio signals (VL, VR). In this way, the amplitudes of audio signals (VL, VR) supplied to the headphone can be increased compared with the case when the level at terminal C is kept constant. Also, the upper limit on the amplitudes of audio signals (VL, VR) can be increased without raising the power supply voltage.
    Type: Application
    Filed: June 22, 2006
    Publication date: February 1, 2007
    Inventors: Akira Yasuda, Toru Ido
  • Patent number: 7123178
    Abstract: A digital encoder having a dynamic element matching (DEM) processor is divided into a master DEM circuit and N slave DEM circuits. The master DEM circuit encodes a multibit digital input signal (IN0) into parallel codes (C1) corresponding to the coefficient of a plurality of output nodes on the basis of a prescribed DEM algorithm. Each of the N slave DEM means (2) has 3 or more output nodes. Code (C1) from the master DEM circuit is encoded into parallel codes (C2) with the same weighting for each code and corresponding to the configuration of the 3 or more output nodes on the basis of a prescribed DEM algorithm, and the obtained parallel codes are output in parallel from 3 or more output nodes.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: October 17, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Soichiro Ishizuka, Toru Ido
  • Publication number: 20060092063
    Abstract: The objective of the invention is to provide a class D amplifier that can reduce aliasing noise. The class D amplifier has D/A converter 10 that operates at the first sampling frequency, and PWM driver 3 that receives the output from D/A converter 10. Said PWM driver 3 operates at the second sampling frequency synchronized to the first sampling frequency. The second sampling frequency can be correlated to the delta wave frequency of the PWM driver. Also, synchronization of said first sampling frequency and said second sampling frequency can be carried out with one of said frequencies being an integer multiple of the other.
    Type: Application
    Filed: October 31, 2005
    Publication date: May 4, 2006
    Inventors: Toru Ido, Soichiro Ishizuka