Patents by Inventor Tatsuaki Kitsuta

Tatsuaki Kitsuta 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).

  • Logic circuit which can be selected to function as a d or t type flip-flop
    Patent number: 5027005
    Abstract: A logic circuit comprises a first terminal for receiving an input data signal, a second terminal for receiving a clock signal, a first latch circuit coupled to the first and second terminals for latching the input data signal responsive to the clock signal, a second latch circuit coupled to the first latch circuit for latching an output signal of the first latch circuit, a third terminal for outputting an output data signal which is output from the second latch circuit, and a selecting part coupled to the third terminal for selectively feeding back the output data signal to the first latch circuit in a first mode and for cutting off the feedback of the output data signal to the first latch circuit in a second mode, where the logic circuit operates as a toggle flip-flop in the first mode and operates as a delay flip-flop in the second mode. The input data signal received by the first terminal selectively identifies one of the two modes of the flip-flop.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: June 25, 1991
    Assignee: Fujitsu Limited
    Inventors: Tatsuaki Kitsuta, Isao Shimotsuhama, Yoshio Watanabe, Masahiro Tanaka, Shinichi Shiotsu, Kazumi Ogawa