Patents by Inventor Masanori Kinugasa

Masanori Kinugasa 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: 5220205
    Abstract: A series circuit of two P-channel transistors and a series circuit of two N-channel transistors are used respectively as a latch circuit which temporarily latches an input signal until the power source fluctuation caused by the change of the output signal is suppressed. The gates of the transistors of the two series-circuits are supplied with the output signal of an output-stage circuit and a delayed output signal obtained by delaying the above output signal so that either one of the two series-circuits can be controlled to be turned on so as to temporarily latch an input signal in a dynamic manner until the power source fluctuation is suppressed. Since the gate signals to the transistors of the two series-circuits are directly supplied without being passed through single-channel type transfer gates, a sufficiently large bias voltages are supplied to the gate of the latch circuits even under the low power source voltage.
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: June 15, 1993
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Shigehara, Masanori Kinugasa
  • Patent number: 5175445
    Abstract: The source-drain paths of p-channel first and second MOSFETs are connected in series between a node, to which a high-potential power source voltage is supplied, and a signal output node. The source-drain paths of n-channel third and fourth MOSFETs are connected in series between the signal output node and a node to which a low-potential power source voltage is supplied. A signal from an input node is supplied to the gates of said four MOSFETs in a parallel manner. The source-drain path of an n-channel fifth MOSFET is connected in parallel to the source-drain path of the second MOSFET which is not directly connected to the node of the high-potential power source voltage. The gate of the fifth MOSFET is connected to the node of the high-potential power source voltage. The source-drain path of a p-channel sixth MOSFET is connected in parallel to the source-drain path of the third MOSFET which is not directly connected to the node of the low-potential power source voltage.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: December 29, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masanori Kinugasa, Hiroshi Shigehara
  • Patent number: 5107137
    Abstract: In a master-slave type flip-flop circuit comprising a master output holding circuit of the master stage circuit, the threshold value of the input circuit of the slave stage circuit has a hysteresis characteristic in which the high level threshold value is set to a higher value than the threshold value of the master output holding circuit and the low level threshold value is set to a lower value than the threshold value of the master output holding circuit. Due to the feature, a phenomenon is prevented in which the output is once inverted and then again inverted in the metastable state.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: April 21, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masanori Kinugasa, Munenobu Kida, Toshimasa Ishikawa
  • Patent number: 5034629
    Abstract: In an output circuit for use in a semiconductor IC comprising a CMOS transistors constituting an output buffer, a transfer gate of CMOS structure is connected between the gates of the CMOS transistors as a resistive element. The transfer gate reduces the changes in the gate potentials of output transistors, which occur when logic inputs are supplied to the gates of the output control transistors. Hence, the deformation of the output waveform, which has resulted from the through currents flowing through the output transistors, is minimized.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: July 23, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masanori Kinugasa, Fuminari Tanaka, Satoshi Nonaka, Munenobu Kida
  • Patent number: 4821084
    Abstract: Extension directions of source electrode layer and a drain electrode are parallel to rows or columns of an array of alternately arranged source regions and drain regions, thereby forming widths of source and drain electrode layers wider than those of a conventional transistor to obtain a large mutual conductance.
    Type: Grant
    Filed: January 21, 1987
    Date of Patent: April 11, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masanori Kinugasa, Fuminari Tanaka, Hiroshi Shigehara, Hirokata Ohta
  • Patent number: 4171984
    Abstract: A refractory composition for flow casting, comprising (1) 100 parts by weight of a refractory material and (2) about 1.15 to 9.4 parts by weight of a binder consisting of an alkali metal silicate, sparingly water-soluble aluminum tripolyphosphate and at least one of an organic paste and a clay, the refractory composition being capable of being kneaded with water prior to use.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: October 23, 1979
    Assignees: Nippon Crucible Co., Ltd., Teikoku Kako Co., Ltd.
    Inventors: Takuo Hosaka, Kunihiko Shiraishi, Ziro Nakano, Masanori Kinugasa