Patents by Inventor Tomohiro Kataoka

Tomohiro Kataoka 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).

  • Encryption and decryption communication semiconductor device and recording/reproducing apparatus
    Patent number: 7290148
    Abstract: Disclosed herein is an encryption and decryption communication semiconductor device comprising at least, a communication interface for performing a transfer of data according to a predetermined communication system, one or two or more encryption/decryption circuits which encrypt or decrypt input data in accordance with a predetermined algorithm, and a plurality of external interfaces for performing the input/output of data from and to external devices. The communication interface, the encryption/decryption circuits and the plurality of external interfaces are formed on one semiconductor chip. In the cryption and decryption communication semiconductor device, input data sent from any one of the plurality of external interfaces is encrypted or decrypted by at least one of the encryption/decryption circuits and is capable of being outputted to any different one of the plurality of external interfaces.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: October 30, 2007
    Assignee: Renesas Technology Corp.
    Inventors: Jun Tozawa, Hiroshi Nogami, Tetsuya Shibayama, Tomohiro Kataoka, Hiroshi Fujio
  • Cryption and decryption communication semiconductor device and recording/reproducing apparatus
    Publication number: 20030159062
    Abstract: Disclosed herein is a cryption and decryption communication semiconductor device comprising at least, a communication interface for performing a transfer of data according to a predetermined communication system, one or two or more encryption/decryption circuits which encrypt or decrypt input data in accordance with a predetermined algorithm, and a plurality of external interfaces for performing the input/output of data from and to external devices. The communication interface, the encryption/decryption circuits and the plurality of external interfaces are formed on one semiconductor chip. In the cryption and decryption communication semiconductor device, input data sent from any one of the plurality of external interfaces is encrypted or decrypted by at least one of the encryption/decryption circuits and is capable of being outputted to any different one of the plurality of external interfaces.
    Type: Application
    Filed: January 29, 2003
    Publication date: August 21, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Jun Tozawa, Hiroshi Nogami, Tetsuya Shibayama, Tomohiro Kataoka, Hiroshi Fujio
  • DC motor control circuit
    Patent number: 5821709
    Abstract: An inverting amplifier circuit generates a comparison voltage by comparing a smoothed voltage of a voltage across a semiconductor switching element and a setting voltage that is generated by device of a voltage setting volume. An operational amplifier generates a drive signal by comparing the above comparison voltage and a triangular voltage. Negative feedback is effected so that the setting voltage becomes equal to the smoothed voltage, which is inversely proportional to the rotation speed of a DC motor.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: October 13, 1998
    Assignee: Omron Corporation
    Inventors: Koji Omori, Tomohiro Kataoka, Kazunori Kajitani
  • Infrared radiation sensor
    Patent number: D597863
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: August 11, 2009
    Assignee: Omron Corporation
    Inventors: Tomohiro Kataoka, Shinichi Wada, Masakazu Shiinoki