Patents by Inventor Seikou Suzuki

Seikou Suzuki 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: 7426154
    Abstract: A sensor adjusting circuit for adjusting a digital sensor, whose circuit scale is small and which can maintain high accuracy in a wide adjustment range is provided. A sensor adjusting circuit for adjusting an analog input signal inputted from a sensor and outputting it as another analog output signal in accordance with a physical quantity to be sensed, comprises: a first analog-to-digital converter having an analog integrator (2) for integrating the analog input signal, a comparator (3) for comparing an output of the analog integrator with a predetermined value, and a D/A converter (7) for outputting an output of the comparator as the input signal; and a second digital-to-analog converter (5) for converting the output of the comparator and outputting it as the analog output signal.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: September 16, 2008
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Masahiro Matsumoto, Satoshi Shimada, Seikou Suzuki, Akihiko Saito, Atsushi Miyazaki, Keiji Hanzawa
  • Publication number: 20060239063
    Abstract: A sensor adjusting circuit for adjusting a digital sensor, whose circuit scale is small and which can maintain high accuracy in a wide adjustment range is provided. A sensor adjusting circuit for adjusting an analog input signal inputted from a sensor and outputting it as another analog output signal in accordance with a physical quantity to be sensed, comprises: a first analog-to-digital converter having an analog integrator (2) for integrating the analog input signal, a comparator (3) for comparing an output of the analog integrator with a predetermined value, and a D/A converter (7) for outputting an output of the comparator as the input signal; and a second digital-to-analog converter (5) for converting the output of the comparator and outputting it as the analog output signal.
    Type: Application
    Filed: May 10, 2006
    Publication date: October 26, 2006
    Applicants: HITACHI , LTD, Hitahi Car Engineering Co., Ltd.
    Inventors: Masahiro Matsumoto, Satoshi Shimada, Seikou Suzuki, Akihiko Saito, Atsushi Miyazaki, Keiji Hanzawa
  • Patent number: 6592732
    Abstract: In a maltilayer exhaust gas component sensor for measuring NOX (nitrogen oxide) and HC (hydrocarbon), the reliability and the productivity are improved without degrading the detecting sensitivity. A gas sensing portion is formed by laminating porous solid electrolyte layers having gas permeability together with an electrode protecting film, porous electrodes having catalytic activity, a porous electric insulating layer and a closely-compacted (dense) solid electrolyte layer, and by placing a heater as a temperature control means in contact with or near the laminated layer body.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: July 15, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Komachiya, Seikou Suzuki
  • Patent number: 6566742
    Abstract: An acceleration sensor is disclosed which includes a capacitance-type acceleration detection element mounted on a ceramic base plate. The element comprises a movable electrode mounted between a pair of fixed electrodes. Acceleration of the sensor in a measurement direction causes the movable electrode to move relative to the fixed electrodes and the element has opposite ends in a direction perpendicular to the measurement direction. The acceleration detection element is mounted on the base at a first one of the opposite ends. Accordingly, the mounting surface of the acceleration sensor is parallel to the direction of acceleration to be detected. Thus the acceleration sensor can be surface-mounted on a printed board, and more be easily mounted in an automobile air bag control system or the like.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: May 20, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Matsumoto, Seikou Suzuki, Masayuki Miki
  • Patent number: 6561030
    Abstract: An acceleration sensor is disclosed which includes a capacitance-type acceleration detection element mounted on a ceramic base plate. The element comprises a movable electrode mounted between a pair of fixed electrodes. Acceleration of the sensor in a measurement direction causes the movable electrode to move relative to the fixed electrodes and the element has opposite ends in a direction perpendicular to the measurement direction. The acceleration detection element is mounted on the base at a first one of the opposite ends. Accordingly, the mounting surface of the acceleration sensor is parallel to the direction of acceleration to be detected. Thus the acceleration sensor can be surface-mounted on a printed board, and more be easily mounted in an automobile air bag control system or the like.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: May 13, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Matsumoto, Seikou Suzuki, Masayuki Miki
  • Patent number: 6557414
    Abstract: A sensor device has a sensing layer and an auxiliary layer for supporting the sensing layer, the two layers being superposed on each other in a laminar form. The sensing layer has a vibratory body displaceable in a direction parallel to a junction surface between the two layers. The auxiliary layer is affixed to the sensing layer and a recess or through-hole of a larger area than that of the vibratory body is formed in the auxiliary layer at a part thereof confronting the vibratory body.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: May 6, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Kohei Sakurai, Masahiro Komachiya, Masahiro Matsumoto, Seikou Suzuki
  • Publication number: 20030005391
    Abstract: A sensor adjusting circuit for adjusting a digital sensor, whose circuit scale is small and which can maintain high accuracy in a wide adjustment range is provided. A sensor adjusting circuit for adjusting an analog input signal inputted from a sensor and outputting it as another analog output signal in accordance with a physical quantity to be sensed, comprises: a first analog-to-digital converter having an analog integrator (2) for integrating the analog input signal, a comparator (3) for comparing an output of the analog integrator with a predetermined value, and a D/A converter (7) for outputting an output of the comparator as the input signal; and a second digital-to-analog converter (5) for converting the output of the comparator and outputting it as the analog output signal.
    Type: Application
    Filed: July 10, 2002
    Publication date: January 2, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Masahiro Matsumoto, Satoshi Shimada, Seikou Suzuki, Akihiko Saito, Atsushi Miyazaki, Keiji Hanzawa
  • Publication number: 20020191378
    Abstract: A semiconductor power element heat dissipation board is provided having a high bonding strength without voids in the bonding portion, and high reliability without forming a thick brittle Al/Cu intermetallic chemical compound. The manufacturing method is simple.
    Type: Application
    Filed: July 30, 2002
    Publication date: December 19, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Seikou Suzuki, Yasuo Kondo, Teruyoshi Abe, Noriyuki Watanabe, Takashi Suzumura, Kazuhiko Nakagawa
  • Patent number: 6463804
    Abstract: An acceleration sensor is disclosed which includes a capacitance-type acceleration detection element mounted on a ceramic base plate. The element comprises a movable electrode mounted between a pair of fixed electrodes. Acceleration of the sensor in a measurement direction causes the movable electrode to move relative to the fixed electrodes and the element has opposite ends in a direction perpendicular to the measurement direction. The acceleration detection element is mounted on the base at a first one of the opposite ends. Accordingly, the mounting surface of the acceleration sensor is parallel to the direction of acceleration to be detected. Thus the acceleration sensor can be surface-mounted on a printed board, and more be easily mounted in an automobile air bag control system or the like.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: October 15, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Matsumoto, Seikou Suzuki, Masayuki Miki
  • Patent number: 6451187
    Abstract: A detector for an air/fuel ratio sensor, which is comprised of a structure formed by stacking an oxygen reference electrode, a dense zirconia solid electrolyte, a negative electrode, a porous zirconia solid electrolyte, a positive electrode and a porous protection film on one another, is formed over a ceramic substrate having a heater built therein. Thus, a combined air/fuel ratio sensor can be obtained which is operated in a short time (about 5 seconds or less) after power-on so as to comply with emission control applied immediately after startup and provides low power consumption and a high degree of reliability.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: September 17, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Seikou Suzuki, Masahiro Komachiya, Tsuyoshi Fujita
  • Publication number: 20020089828
    Abstract: An object of the present invention is to provide a semiconductor power element heat dissipation board which has a high bonding strength without voids in the bonding portion, and has high reliability without forming a thick brittle Al/Cu intermetallic chemical compound, and of which the manufacturing method is simple, and to provide a conductor plate and a heat sink plate and a solder used for the semiconductor power element heat dissipation board, and to provide a power module and a composite plate using the semiconductor power element heat dissipation board.
    Type: Application
    Filed: October 31, 2001
    Publication date: July 11, 2002
    Inventors: Seikou Suzuki, Yasuo Kondo, Teruyoshi Abe, Noriyuki Watanabe, Takashi Suzumura, Kazuhiko Nakagawa
  • Patent number: 6388887
    Abstract: An acceleration sensor is disclosed which includes a capacitance-type acceleration detection element mounted on a ceramic base plate. The element comprises a movable electrode mounted between a pair of fixed electrodes. Acceleration of the sensor in a measurement direction causes the movable electrode to move relative to the fixed electrodes and the element has opposite ends in a direction perpendicular to the measurement direction. The acceleration detection element is mounted on the base at a first one of the opposite ends. Accordingly, the mounting surface of the acceleration sensor is parallel to the direction of acceleration to be detected. Thus the acceleration sensor can be surface-mounted on a printed board, and more be easily mounted in an automobile air bag control system or the like.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: May 14, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Matsumoto, Seikou Suzuki, Masayuki Miki
  • Publication number: 20020029637
    Abstract: An acceleration sensor is disclosed which includes a capacitance-type acceleration detection element mounted on a ceramic base plate. The element comprises a movable electrode mounted between a pair of fixed electrodes. Acceleration of the sensor in a measurement direction causes the movable electrode to move relative to the fixed electrodes and the element has opposite ends in a direction perpendicular to the measurement direction. The acceleration detection element is mounted on the base at a first one of the opposite ends. Accordingly, the mounting surface of the acceleration sensor is parallel to the direction of acceleration to be detected. Thus the acceleration sensor can be surface-mounted on a printed board, and more be easily mounted in an automobile air bag control system or the like.
    Type: Application
    Filed: May 25, 2001
    Publication date: March 14, 2002
    Inventors: Masahiro Matsumoto, Seikou Suzuki, Masayuki Miki
  • Publication number: 20020017134
    Abstract: A sensor device has a sensing layer and an auxiliary layer for supporting the sensing layer, the two layers being superposed on each other in a laminar form. The sensing layer has a vibratory body displaceable in a direction parallel to a junction surface between the two layers. The auxiliary layer is affixed to the sensing layer and a recess or through-hole of a larger area than that of the vibratory body is formed in the auxiliary layer at a part thereof confronting the vibratory body.
    Type: Application
    Filed: October 5, 2001
    Publication date: February 14, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Kohei Sakurai, Masahiro Komachiya, Masahiro Matsumoto, Seikou Suzuki
  • Patent number: 6305223
    Abstract: An acceleration sensor is disclosed which includes a capacitance-type acceleration detection element mounted on a ceramic base plate. The element comprises a movable electrode mounted between a pair of fixed electrodes. Acceleration of the sensor in a measurement direction causes the movable electrode to move relative to the fixed electrodes and the element has opposite ends in a direction perpendicular to the measurement direction. The acceleration detection element is mounted on the base at a first one of the opposite ends. Accordingly, the mounting surface of the acceleration sensor is parallel to the direction of acceleration to be detected. Thus the acceleration sensor can be surface-mounted on a printed board, and more be easily mounted in an automobile air bag control system or the like.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: October 23, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Matsumoto, Seikou Suzuki, Masayuki Miki
  • Publication number: 20010023615
    Abstract: An acceleration sensor is disclosed which includes a capacitance-type acceleration detection element mounted on a ceramic base plate. The element comprises a movable electrode mounted between a pair of fixed electrodes. Acceleration of the sensor in a measurement direction causes the movable electrode to move relative to the fixed electrodes and the element has opposite ends in a direction perpendicular to the measurement direction. The acceleration detection element is mounted on the base at a first one of the opposite ends. Accordingly, the mounting surface of the acceleration sensor is parallel to the direction of acceleration to be detected. Thus the acceleration sensor can be surface-mounted on a printed board, and more be easily mounted in an automobile air bag control system or the like.
    Type: Application
    Filed: May 31, 2001
    Publication date: September 27, 2001
    Inventors: Masahiro Matsumoto, Seikou Suzuki, Masayuki Miki
  • Patent number: 6188340
    Abstract: A sensor adjusting circuit for adjusting a digital sensor, whose circuit scale is small and which can maintain high accuracy in a wide adjustment range is provided. A sensor adjusting circuit for adjusting an analog input signal inputted from a sensor and outputting it as another analog output signal in accordance with a physical quantity to be sensed, comprises: a first analog-to-digital converter having an analog integrator (2) for integrating the analog input signal, a comparator (3) for comparing an output of the analog integrator with a predetermined value, and a D/A converter (7) for outputting an output of the comparator as the input signal; and a second digital-to-analog converter (5) for converting the output of the comparator and outputting it as the analog output signal.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: February 13, 2001
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Masahiro Matsumoto, Satoshi Shimada, Seikou Suzuki, Akihiko Saito, Atsushi Miyazaki, Keiji Hanzawa
  • Patent number: 6167761
    Abstract: In a capacitance type pressure sensor, a diaphragm is formed of a fragile material using an impurity-diffused monocrystal silicon and constitutes a stable pressure-responsive structure which does not undergo a plastic deformation. Between the diaphragm and a movable electrode is formed an oxide film to diminish stray capacitance between the movable electrode and a substrate and also between the movable electrode and a impurity-diffused layer. The oxide film and the movable electrode are each divided into plural regions so that the divided regions of the movable electrode are formed on the divided regions of the oxide film, thereby diminishing stress strain induced by a difference in therm expansion coefficient among the diaphragm, oxide film and movable electrode.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: January 2, 2001
    Assignee: Hitachi, Ltd. and Hitachi Car Engineering Co., Ltd.
    Inventors: Keiji Hanzawa, Akio Yasukawa, Satoshi Shimada, Seikou Suzuki, Akihiko Saito, Masahiro Matsumoto, Atsushi Miyazaki, Norio Ichikawa, Junichi Horie, Seiji Kuryu
  • Patent number: 6122974
    Abstract: A pressure sensor superior in pressure resistance and capable of covering from a low to high pressure range as a measuring range is to be provided. Plural pressure sensing sections for high and low pressures are formed on a silicon board, the pressure sensing sections each com ing an outer frame portion, a diaphragm portion, a strain gauge portion and an electrode portion. The silicon board side with the strain gauge portions formed thereon and an insulating substrate having electrode take-out portions are bonded together in such a manner that the strain gauge portions are hermetically sealed and that the electrode portions on the silicon board and the electrode take-out portions of the insulating substrate are electrically connected with each other, to constitute a pressure sensing unit.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: September 26, 2000
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Shinya Sato, Seikou Suzuki, Shinichi Yamaguchi, Yoshiyuki Sasada, Masayuki Miki, Masanori Kubota, Atsushi Miyazaki
  • Patent number: 6051853
    Abstract: A semiconductor pressure sensor utilizing electrostatic capacitance has a plurality of pressure sensing electrostatic capacitances and a reference electrostatic capacitance formed on one side of a silicon chip. As a movable electrode, the pressure sensing electrostatic capacitances each have a diaphragm, which may have a displacement portion composed of a central area thereof, and a peripheral portion which is more deformable than the central portion.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: April 18, 2000
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Satoshi Shimada, Akihiko Saito, Masahiro Matsumoto, Seikou Suzuki, Terumi Nakazawa, Atsushi Miyazaki, Norio Ichikawa, Keiji Hanzawa