Patents by Inventor Masaaki Usui

Masaaki Usui 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: 20220278692
    Abstract: An AD converter includes a plurality of analog input terminals, a reference signal generation circuit that generates an analog reference signal, a sample-and-hold unit that includes a plurality of sample-and-hold circuits sampling the analog reference signal or one of analog input signals from the analog input terminals, a control unit that controls the sample-and-hold unit, and a conversion unit that converts an output signal from the sample-and-hold unit into a digital signal. The control unit controls the sample-and-hold unit to perform the output operation for analog input signal and the sampling operation for the analog reference signal.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 1, 2022
    Inventor: Masaaki USUI
  • Patent number: 10003351
    Abstract: An object of the present invention is to shorten time required for detecting disconnection in an input terminal of an A/D conversion circuit. A semiconductor device includes a first input channel that couples a first input terminal and an A/D conversion unit to each other, a second input channel that couples a second input terminal and the A/D conversion unit to each other, and a control circuit unit that separates the second input channel from the second input terminal and the A/D conversion unit to charge or discharge the second input channel when a signal input into the first input terminal is sampled by the A/D conversion unit.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: June 19, 2018
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Masaaki Usui, Shunsuke Nakano
  • Publication number: 20180041220
    Abstract: An object of the present invention is to shorten time required for detecting disconnection in an input terminal of an A/D conversion circuit. A semiconductor device includes a first input channel that couples a first input terminal and an A/D conversion unit to each other, a second input channel that couples a second input terminal and the A/D conversion unit to each other, and a control circuit unit that separates the second input channel from the second input terminal and the A/D conversion unit to charge or discharge the second input channel when a signal input into the first input terminal is sampled by the A/D conversion unit.
    Type: Application
    Filed: September 18, 2017
    Publication date: February 8, 2018
    Inventors: Masaaki USUI, Shunsuke NAKANO
  • Patent number: 9793911
    Abstract: An object of the present invention is to shorten time required for detecting disconnection in an input terminal of an A/D conversion circuit. A semiconductor device includes a first input channel that couples a first input terminal and an A/D conversion unit to each other, a second input channel that couples a second input terminal and the A/D conversion unit to each other, and a control circuit unit that separates the second input channel from the second input terminal and the A/D conversion unit to charge or discharge the second input channel when a signal input into the first input terminal is sampled by the A/D conversion unit.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: October 17, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Masaaki Usui, Shunsuke Nakano
  • Publication number: 20170093419
    Abstract: An object of the present invention is to shorten time required for detecting disconnection in an input terminal of an A/D conversion circuit. A semiconductor device includes a first input channel that couples a first input terminal and an A/D conversion unit to each other, a second input channel that couples a second input terminal and the A/D conversion unit to each other, and a control circuit unit that separates the second input channel from the second input terminal and the A/D conversion unit to charge or discharge the second input channel when a signal input into the first input terminal is sampled by the A/D conversion unit.
    Type: Application
    Filed: September 14, 2016
    Publication date: March 30, 2017
    Inventors: Masaaki USUI, Shunsuke NAKANO
  • Patent number: 7676417
    Abstract: A method and system for collectively displaying in real-time on the Internet the status of personal assets and transactions. The system comprises a plurality of asset databases corresponding to a plurality of financial institutions; storing portfolio information related to total assets in the above-mentioned plurality of financial institutions; a unified asset management server for receiving asset information from the above-mentioned plurality of financial institutions and storing same respectively in the above-mentioned plurality of asset databases, and preparing the above-mentioned portfolio based on the above-mentioned plurality of asset databases and storing the same; an asset management database for managing a user's assets; and a financial institution server connected to the above-mentioned authentication database, the above-mentioned asset management database, and the above-mentioned transaction management database. The unified asset management server prepares a portfolio of all assets.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: March 9, 2010
    Inventor: Masaaki Usui
  • Publication number: 20060206400
    Abstract: A method and system for collectively displaying in real-time on the Internet the status of personal assets and transactions. The system comprises a plurality of asset databases corresponding to a plurality of financial institutions; storing portfolio information related to total assets in the above-mentioned plurality of financial institutions; a unified asset management server for receiving asset information from the above-mentioned plurality of financial institutions and storing same respectively in the above-mentioned plurality of asset databases, and preparing the above-mentioned portfolio based on the above-mentioned plurality of asset databases and storing the same; an asset management database for managing a user's assets; and a financial institution server connected to the above-mentioned authentication database, the above-mentioned asset management database, and the above-mentioned transaction management database. The unified asset management server prepares a portfolio of all assets.
    Type: Application
    Filed: May 5, 2006
    Publication date: September 14, 2006
    Inventor: Masaaki Usui
  • Patent number: 7069241
    Abstract: A method and system for collectively displaying in real-time on the Internet the status of personal assets and transactions. The system comprises a plurality of asset databases corresponding to a plurality of financial institutions; storing portfolio information related to total assets in the above-mentioned plurality of financial institutions; a unified asset management server for receiving asset information from the above-mentioned plurality of financial institutions and storing same respectively in the above-mentioned plurality of asset databases, and preparing the above-mentioned portfolio based on the above-mentioned plurality of asset databases and storing the same; an asset management database for managing a user's assets; and a financial institution server connected to the above-mentioned authentication database, the above-mentioned asset management database, and the above-mentioned transaction management database. The unified asset management server prepares a portfolio of all assets.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: June 27, 2006
    Inventor: Masaaki Usui
  • Publication number: 20030061285
    Abstract: The present invention is directed to providing an interactive communication system which implements real-time interactive communication using an audio-visual tool. In one embodiment, the system provides an interactive communication system and method that allows interactive communication simultaneously using a real-time moving image and voice over a network. In another embodiment, the system and method allows interactive communication using real-time images and voice between a plurality of users. In a further embodiment, the system and method combines the direct transmission of text data and other information with real-time transmission of the images all the users' and voices.
    Type: Application
    Filed: September 25, 2001
    Publication date: March 27, 2003
    Inventors: Tatsuo Usui, Masaaki Usui
  • Publication number: 20020186781
    Abstract: Methods and apparatus are described for transmitting information via a transmission medium. First information represented according to a first number system of a first order is received. The first information is converted to second information, the second information being represented according to a second number system of a second order, the second order being greater than the first order. The second information is then represented using a first number of unique signal characteristics, the first number corresponding to the second order. The second information is then transmitted via the transmission medium.
    Type: Application
    Filed: May 8, 2001
    Publication date: December 12, 2002
    Inventor: Masaaki Usui
  • Patent number: 5151373
    Abstract: An electrode structure of a solar cell includes a metal wire fixed to the light incident surface of the solar cell with an electrically conductive adhesive. An electrode production method of a solar cell includes applying an electrically conductive adhesive to at least one of a portion of a metal wire and a portion of the light incident surface of the solar cell, pressing the metal wire into a predetermined position of the light incident surface of the solar cell, and solidifying the conductive adhesive to fix the metal wire.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: September 29, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mikio Deguchi, Takushi Itagaki, Masaaki Usui
  • Patent number: 5131956
    Abstract: A photovoltaic semiconductor device includes a first conductivity type silicon substrate having a first main surface, a first conductivity type compound semiconductor layer disposed on a first, major portion of the first main surface of the silicon substrate, a second conductivity type compound semiconductor layer disposed on the first conductivity type compound semiconductor layer, a first electrode connected to the second conductivity type compound semiconductor layer, a portion of the first electrode being disposed on a second, minor portion of the first main surface of the silicon substrate with an intervening insulating film, and a second electrode disposed on a third, minor portion of the first main surface of the silicon substrate.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: July 21, 1992
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Nippon Telegraph and Telephone Corporation
    Inventors: Takahiko Oohara, Masaaki Usui, Nobuyoshi Ogasawara, Kotaro Mitsui
  • Patent number: 5084107
    Abstract: An electrode structure of a solar cell includes a metal wire fixed to the light incident surface of the solar cell with an electrically conductive adhesive. An electrode production method of a solar cell includes applying an electrically conductive adhesive to at least one of a portion of a metal wire and a portion of the light incident surface of the solar cell, pressing the metal wire into a predetermined position of the light incident surface of the solar cell, and solidifying the conductive adhesive to fix the metal wire.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: January 28, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mikio Deguchi, Takushi Itagaki, Masaaki Usui