Patents by Inventor Hiroyasu Yokota

Hiroyasu Yokota 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).

  • Battery state monitoring circuit
    Patent number: 6867567
    Abstract: In a battery state monitoring circuit and a battery device using the same, even if a charge inhibiting signal is inputted to a microcomputer control terminal, a lock mode is prevented from occurring in which both a charge control transistor and a discharge control transistor are turned OFF and a battery voltage can not be supplied to a load. A circuit is structured such that even if the charge inhibiting signal is inputted to the microcomputer control terminal, in the case where the overcurrent voltage detection terminal comes to have the overcurrent detection voltage, the charge inhibiting signal of the microcomputer control terminal is cancelled.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: March 15, 2005
    Assignee: Seiko Instruments Inc.
    Inventors: Hiroyasu Yokota, Atsushi Sakurai
  • Battery state monitoring circuit
    Publication number: 20020109484
    Abstract: In a battery state monitoring circuit and a battery device using the same, even if a charge inhibiting signal is inputted to a microcomputer control terminal, a lock mode is prevented from occurring in which both a charge control transistor and a discharge control transistor are turned OFF and a battery voltage can not be supplied to a load. A circuit is structured such that even if the charge inhibiting signal is inputted to the microcomputer control terminal, in the case where the overcurrent voltage detection terminal comes to have the overcurrent detection voltage, the charge inhibiting signal of the microcomputer control terminal is cancelled.
    Type: Application
    Filed: February 14, 2002
    Publication date: August 15, 2002
    Inventors: Hiroyasu Yokota, Atsushi Sakurai