Patents by Inventor Jyunji Michiyama

Jyunji Michiyama 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).

  • Current sense amplifier circuit
    Patent number: 6469937
    Abstract: A current sense amplifier circuit is provided with a reference current generator for generating a reference current according to the characteristics of a memory cell, and a current comparator, and the current comparator compares the memory cell current with the reference current. Thereby, the range of the operating power supply voltage is increased. Further, a current sense amplifier circuit is provided with plural sets of reference current generators and current comparators, and the reference current generators generate reference currents of different amounts corresponding to plural states the memory cell can take, and the current comparators compare the respective reference currents with the memory cell current. Therefore, it is possible to detect the current in the memory cell that is set in multiple states.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: October 22, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Ikuo Fuchigami, Tomonori Kataoka, Youichi Nishida, Tomoo Kimura, Jyunji Michiyama, Satoshi Kohtaka
  • Current sense amplifier circuit
    Publication number: 20020057597
    Abstract: A current sense amplifier circuit is provided with a reference current generator for generating a reference current according to the characteristics of a memory cell, and a current comparator, and the current comparator compares the memory cell current with the reference current. Thereby, the range of the operating power supply voltage is increased. Further, a current sense amplifier circuit is provided with plural sets of reference current generators and current comparators, and the reference current generators generate reference currents of different amounts corresponding to plural states the memory cell can take, and the current comparators compare the respective reference currents with the memory cell current. Therefore, it is possible to detect the current in the memory cell that is set in multiple states.
    Type: Application
    Filed: January 9, 2002
    Publication date: May 16, 2002
    Inventors: Ikuo Fuchigami, Tomonori Kataoka, Youichi Nishida, Tomoo Kimura, Jyunji Michiyama, Satoshi Kohtaka
  • Current sense amplifier circuit
    Patent number: 6351416
    Abstract: A current sense amplifier circuit is provided with a reference current generator for generating a reference current according to the characteristics of a memory cell, and a current comparator, and the current comparator compares the memory cell current with the reference current. Thereby, the range of the operating power supply voltage is increased. Further, a current sense amplifier circuit is provided with plural sets of reference current generators and current comparators, and the reference current generators generate reference currents of different amounts corresponding to plural states the memory cell can take, and the current comparators compare the respective reference currents with the memory cell current. Therefore, it is possible to detect the current in the memory cell that is set in multiple states.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: February 26, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Ikuo Fuchigami, Tomonori Kataoka, Youichi Nishida, Tomoo Kimura, Jyunji Michiyama, Satoshi Kohtaka
  • Current sense amplifier circuit
    Publication number: 20010024381
    Abstract: A current sense amplifier circuit is provided with a reference current generator for generating a reference current according to the characteristics of a memory cell, and a current comparator, and the current comparator compares the memory cell current with the reference current. Thereby, the range of the operating power supply voltage is increased. Further, a current sense amplifier circuit is provided with plural sets of reference current generators and current comparators, and the reference current generators generate reference currents of different amounts corresponding to plural states the memory cell can take, and the current comparators compare the respective reference currents with the memory cell current. Therefore, it is possible to detect the current in the memory cell that is set in multiple states.
    Type: Application
    Filed: March 2, 2001
    Publication date: September 27, 2001
    Inventors: Ikuo Fuchigami, Tomonori Kataoka, Youichi Nishida, Tomoo Kimura, Jyunji Michiyama, Satoshi Kohtaka