Patents by Inventor Mituyoshi Fukuda

Mituyoshi Fukuda 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).

  • Data input/output circuit for a digital signal processing system
    Patent number: 5489901
    Abstract: A data input/output circuit includes a 32-bit reversible shift register (1) which includes four 8-bit reversible shift registers (2-5). Input gate circuits (6, 7) selectively apply data being inputted in a bit-serial fashion from an external to the 8-bit reversible shift registers (3, 4), and output gate circuits (8-12) selectively output data being stored in arbitrary stages of the 32-bit reversible shift register (1) in a bit-serial fashion. Input latches (13-15) and output latches (16-18) each of which is an 8-bit latch are connected to the respective 8-bit reversible shift registers (2-4) and a data bus (19). The input latches (13-15) hold the data being stored in the 8-bit reversible shift registers (2-4) and send the same onto the data bus (19) in a bit-parallel fashion, and the output latches (16-18) hold the data being sent from the data bus (19) and preset the same into the 8-bit reversible shift registers (2-4) in a bit-parallel fashion.
    Type: Grant
    Filed: February 24, 1993
    Date of Patent: February 6, 1996
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Mituyoshi Fukuda, Masahisa Shimizu, Hideki Ohashi, Masaki Kawaguchi