Patents by Inventor Atsushi Matsuda

Atsushi Matsuda 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).

  • Patent number: 7511566
    Abstract: A band gap reference circuit is configured by connecting an emitter of a transistor, having the base and the collector thereof grounded, to an internal circuit, and by connecting an emitter of another transistor, having the base and the collector thereof grounded, to the internal circuit via a resistor having a positive temperature dependence with respect to the absolute temperature, so as to ensure that a constant output current with a small temperature dependence can be generated, without providing any voltage-current conversion circuit and without generating a constant output voltage, while suppressing expansion in the circuit scale but based on a circuit configuration allowing lowering in the power source voltage.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: March 31, 2009
    Assignee: Fujitsu Microelectronics Limited
    Inventor: Atsushi Matsuda
  • Patent number: 7473731
    Abstract: A hydroxyapatite complex includes a hydroxyapatite sintered compact that is chemically bonded to a polymer-based material containing at least one functional group selected form a group consisting of an isocyanate group and an alkoxysilyl group, wherein: the hydroxyapatite sintered compact is reacted with the functional group of the polymer-based material. This arrangement allows manufacturing of a hydroxyapatite complex without a chemical pre-treatment of the hydroxyapatite sintered compact.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: January 6, 2009
    Assignees: Japan Science & Technology Agency, Japan As Represented By The President., Independent Administration Instit.
    Inventors: Tsutomu Furuzono, Akio Kisida, Junzo Tanaka, Atsushi Matsuda
  • Publication number: 20070200637
    Abstract: A PLL circuit has a phase comparator to receive an input signal and a feedback signal, a charge pump controlled by an output of the phase comparator, a lowpass filter part to receive an output of the charge pump, a current controlled oscillator controlled by an output of the lowpass filter part, and a frequency divider to frequency-divide an output of the current controlled oscillator and to output the feedback signal. The lowpass filter part has an amplifier to receive the output of the charge pump and a reference voltage, and a circuit part including capacitors and resistors to receive the output of the charge pump and an output of the amplifier.
    Type: Application
    Filed: August 17, 2006
    Publication date: August 30, 2007
    Inventors: Kenichi Kodato, Atsushi Matsuda
  • Patent number: 7260979
    Abstract: An oxygen sensor includes a sensor element, a holder having a hole through which the sensor element is arranged, a sealing positioning portion for sealing a clearance between the sensor element and the holder and positioning the sensor element in the holder and being filled with a ceramic powder, terminals arranged to be in contact with the sensor element and for taking an output from the sensor element, an insulator secured to the holder at a first end and for holding the terminals, a casing secured to the holder at the first end and for covering an outer periphery of the insulator, and a protector secured to the holder at a second end and for covering an outer periphery of a portion of the sensor element, the portion protruding from the second end of the holder.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: August 28, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Matsuda, Nobuaki Sekiya, Motomichi Kambayashi
  • Publication number: 20070111654
    Abstract: A fan type chemical diffusing apparatus includes an apparatus main body having an air inlet and an air outlet, a fan type blower disposed in the apparatus main body, and an active ingredient impregnated body or mass for containing an active ingredient. The fan type blower includes a fan casing, a motor, and a fan including a rotary disk and a plurality of blades fastened to a peripheral portion of the rotary disk and provided with a hollow space that is on an interior of the fan with respect to the blades. The fan type blower is operable to send air from the air inlet through the hollow space and out through the air outlet.
    Type: Application
    Filed: December 20, 2006
    Publication date: May 17, 2007
    Applicant: Fumakilla Limited
    Inventors: Satoshi Yamasaki, Kazunori Yamamoto, Atsushi Matsuda
  • Publication number: 20070087679
    Abstract: A fan type chemical diffusing apparatus includes an apparatus main body having an air inlet and an air outlet, a fan type blower disposed in the apparatus main body, and an active ingredient impregnated body or mass for containing an active ingredient. The fan type blower includes a fan casing, a motor, and a fan including a rotary disk and a plurality of blades fastened to a peripheral portion of the rotary disk and provided with a hollow space that is on an interior of the fan with respect to the blades. The fan type blower is operable to send air from the air inlet through the hollow space and out through the air outlet.
    Type: Application
    Filed: December 20, 2006
    Publication date: April 19, 2007
    Applicant: Fumakilla Limited
    Inventors: Satoshi Yamasaki, Kazunori Yamamoto, Atsushi Matsuda
  • Patent number: 7175815
    Abstract: A fan type chemical diffusing apparatus includes an apparatus main body having an air inlet and an air outlet, a fan type blower disposed in the apparatus main body, and an active ingredient impregnated body or mass for containing an active ingredient. The fan type blower includes a fan casing, a motor, and a fan including a rotary disk and a plurality of blades fastened to a peripheral portion of the rotary disk and provided with a hollow space that is on an interior of the fan with respect to the blades. The fan type blower is operable to send air from the air inlet through the hollow space and out through the air outlet.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: February 13, 2007
    Assignee: Fumakilla Ltd.
    Inventors: Satoshi Yamasaki, Kazunori Yamamoto, Atsushi Matsuda
  • Publication number: 20060208761
    Abstract: A band gap reference circuit is configured by connecting an emitter of a transistor, having the base and the collector thereof grounded, to an internal circuit, and by connecting an emitter of another transistor, having the base and the collector thereof grounded, to the internal circuit via a resistor having a positive temperature dependence with respect to the absolute temperature, so as to ensure that a constant output current with a small temperature dependence can be generated, without providing any voltage-current conversion circuit and without generating a constant output voltage, while suppressing expansion in the circuit scale but based on a circuit configuration allowing lowering in the power source voltage.
    Type: Application
    Filed: June 29, 2005
    Publication date: September 21, 2006
    Inventor: Atsushi Matsuda
  • Publication number: 20060183456
    Abstract: A semiconductor device includes a first analog circuit (53) adapted to a first performance, and a second analog circuit (55) realizing a second performance higher than the first performance by cooperating with the first analog circuit. It becomes possible to switch circuit characteristics appropriately in accordance with a requested performance while suppressing an increase of a circuit scale, by operating the first analog circuit and interrupting a power supply to the second analog circuit when the first performance is requested, and by operating the first analog circuit and the second analog circuit together when the second performance is requested to thereby share the first analog circuit.
    Type: Application
    Filed: April 13, 2006
    Publication date: August 17, 2006
    Inventors: Kenichi Minobe, Atsushi Matsuda, Masashi Okubo
  • Publication number: 20060137241
    Abstract: A fan type debugging apparatus is provided in which the active ingredient impregnated body or mass is disposed in a wind inlet side of the fan type blower and is designed to provide a wind force resistance which in terms of the proportion of current consumption by the motor in the presence of the active ingredient impregnated body or mass to current consumption by the motor in the absence of the active ingredient impregnated body or mass, ranges from 5 to 25%.
    Type: Application
    Filed: January 13, 2006
    Publication date: June 29, 2006
    Applicant: Fumakilla Limited
    Inventors: Satoshi Yamasaki, Kazunori Yamamoto, Atsushi Matsuda
  • Patent number: 6999016
    Abstract: A D/A converter in which reference voltage around which voltages outputted vary is not generated by an amplifier in order to reduce electric current consumption. A resistor circuit divides power supply voltage and outputs a plurality of voltages which make up an arithmetic progression. A decoder circuit decodes a digital signal and outputs a control signal. A switching circuit is turned on/off in accordance with the control signal sent from the decoder circuit and selects and outputs one of the plurality of voltages outputted from the resistor circuit.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: February 14, 2006
    Assignee: Fujitsu Limited
    Inventors: Akira Haga, Atsushi Matsuda
  • Publication number: 20050168367
    Abstract: A D/A converter in which reference voltage around which voltages outputted vary is not generated by an amplifier in order to reduce electric current consumption. A resistor circuit divides power supply voltage and outputs a plurality of voltages which make up an arithmetic progression. A decoder circuit decodes a digital signal and outputs a control signal. A switching circuit is turned on/off in accordance with the control signal sent from the decoder circuit and selects and outputs one of the plurality of voltages outputted from the resistor circuit.
    Type: Application
    Filed: June 10, 2004
    Publication date: August 4, 2005
    Inventors: Akira Haga, Atsushi Matsuda
  • Publication number: 20050126261
    Abstract: An oxygen sensor includes a sensor element, a holder having a hole through which the sensor element is arranged, a sealing positioning portion for sealing a clearance between the sensor element and the holder and positioning the sensor element in the holder and being filled with a ceramic powder, terminals arranged to be in contact with the sensor element and for taking an output from the sensor element, an insulator secured to the holder at a first end and for holding the terminals, a casing secured to the holder at the first end and for covering an outer periphery of the insulator, and a protector secured to the holder at a second end and for covering an outer periphery of a portion of the sensor element, the portion protruding from the second end of the holder.
    Type: Application
    Filed: December 7, 2004
    Publication date: June 16, 2005
    Inventors: Atsushi Matsuda, Nobuaki Sekiya, Motomichi Kambayashi
  • Publication number: 20050124060
    Abstract: An enzyme activity measuring apparatus comprises a reagent/sample disposing unit 5 which disposed a sample and a reagent containing member 13 including an enzyme activity measuring reagent at a distance from each other, a sample transcription unit 7 which brings the disposed reagent containing member 13 and the sample into contact with each other to transcribe a predetermined volume of sample to the reagent containing member 13, a color depth measuring unit 9 configured to measure color depth of a reagent included in the reagent containing member 13 when predetermined time is elapsed after the sample is transcribed, and CPU 101 configured to detect an activity of enzyme included in the sample based on the measured color depth.
    Type: Application
    Filed: October 18, 2004
    Publication date: June 9, 2005
    Inventors: Masaki Yamaguchi, Kazuhito Suzuki, Tomoyuki Higashi, Atsushi Matsuda
  • Publication number: 20050119732
    Abstract: A hydroxyapatite complex includes a hydroxyapatite sintered compact that is chemically bonded to a polymer-based material containing at least one functional group selected form a group consisting of an isocyanate group and an alkoxysilyl group, wherein: the hydroxyapatite sintered compact is reacted with the functional group of the polymer-based material. This arrangement allows manufacturing of a hydroxyapatite complex without a chemical pre-treatment of the hydroxyapatite sintered compact.
    Type: Application
    Filed: May 29, 2003
    Publication date: June 2, 2005
    Inventors: Tsutomu Furuzono, Akio Kisida, Junzo Tanaka, Atsushi Matsuda
  • Patent number: 6819273
    Abstract: An integrated circuit includes an analog signal output unit which converts a digital output signal into at least one analog output signal, and outputs the at least one analog output signal, an analog signal input unit which converts at least one analog input signal received from an exterior into a digital input signal, a switch circuit which provides at least one signal path through which the at least one analog output signal is supplied from the analog signal output unit to the analog signal input unit as the at least one analog input signal, and an offset adjustment control circuit which supplies an output offset from the analog signal output unit to the analog signal input unit via the at least one signal path so as to detect the digital input signal inclusive of the output offset and an input offset, and cancels offsets of the analog signal output unit and the analog signal input unit in response to the output offset and the input offset obtained from the detected digital input signal.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: November 16, 2004
    Assignee: Fujitsu Limited
    Inventors: Tohru Mizutani, Hiromi Nanba, Atsushi Matsuda, Atsushi Hitaka, Masashi Okubo, Yoshinori Yoshikawa, Kenichi Minobe
  • Patent number: 6639536
    Abstract: First and second switches are connected at each node between adjacent resistors in a resistor row and at the end of the resistor row. A predetermined number of first switches are grouped together and short-circuited to obtain a plurality of first switch groups, and a predetermined number of second switches are grouped together and short-circuited to obtain a plurality of second switch groups. The first and second switch groups are connected to output terminals via output switches. The first and second switches are ON/OFF controlled such that only one switch in the first and second switch groups is connected to the resistance row.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: October 28, 2003
    Assignee: Fujitsu Limited
    Inventors: Atsushi Matsuda, Tohru Mizutani
  • Publication number: 20030179118
    Abstract: An integrated circuit includes an analog signal output unit which converts a digital output signal into at least one analog output signal, and outputs the at least one analog output signal, an analog signal input unit which converts at least one analog input signal received from an exterior into a digital input signal, a switch circuit which provides at least one signal path through which the at least one analog output signal is supplied from the analog signal output unit to the analog signal input unit as the at least one analog input signal, and an offset adjustment control circuit which supplies an output offset from the analog signal output unit to the analog signal input unit via the at least one signal path so as to detect the digital input signal inclusive of the output offset and an input offset, and cancels offsets of the analog signal output unit and the analog signal input unit in response to the output offset and the input offset obtained from the detected digital input signal.
    Type: Application
    Filed: February 19, 2003
    Publication date: September 25, 2003
    Inventors: Tohru Mizutani, Hiromi Nanba, Atsushi Matsuda, Atsushi Hitaka, Masashi Okubo, Yoshinori Yoshikawa, Kenichi Minobe
  • Publication number: 20030151537
    Abstract: First and second switches are connected at each node between adjacent resistors in a resistor row and at the end of the resistor row. A predetermined number of first switches are grouped together and short-circuited to obtain a plurality of first switch groups, and a predetermined number of second switches are grouped together and short-circuited to obtain a plurality of second switch groups. The first and second switch groups are connected to output terminals via output switches. The first and second switches are ON/OFF controlled such that only one switch in the first and second switch groups is connected to the resistance row.
    Type: Application
    Filed: February 11, 2003
    Publication date: August 14, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Atsushi Matsuda, Tohru Mizutani
  • Publication number: 20020189545
    Abstract: A heating element CVD device capable of providing a high productivity and decomposing and/or activating the material gas led into a processing container by a heating element and stacking film on a substrate disposed in the processing container, wherein the connection part area of the heating element to a connection terminal for connecting the hearing element to a power supply mechanism is not exposed to a space inside the processing container, specifically, the connection part area is covered by a cylindrical body or a platy body covering the connection part area while providing a space part thereof from the hearing element, or the connection part area allows the space part to be present in a space thereof from the connection terminal and is covered by the cylindrical body or platy body covering the connection part area while providing the space part in a space thereof from the heating element, and hydrogen gas is led from the connection terminal side into the processing container through the space part, wher
    Type: Application
    Filed: May 14, 2002
    Publication date: December 19, 2002
    Inventors: Hideki Matsumura, Atsushi Matsuda, Keiji Ishibashi, Masahiko Tanaka, Minoru Karasawa