Patents by Inventor Keizou Mizui

Keizou Mizui 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).

  • Constant voltage power supply circuit
    Patent number: 8693155
    Abstract: A constant voltage power supply circuit includes an output voltage dependent over-current protection circuit unit and a drooping over-current protection circuit unit. The output voltage dependent over-current protection circuit unit reduces, when an output current which is output from an output terminal of an output control transistor exceeds a first set value which is determined in advance, the output current from the first set value in a manner dependent on a reduction of an output voltage which is output from the output terminal. The drooping over-current protection circuit unit detects, with an external resistor, the output current which is output from the output terminal of the output control transistor, and reduces, when the detected output current exceeds a second set value which is determined in advance and which has a lower value than the first set value, the output voltage while maintaining the output current at the second set value.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: April 8, 2014
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Keizou Mizui
  • CONSTANT VOLTAGE POWER SUPPLY CIRCUIT
    Publication number: 20120087053
    Abstract: A constant voltage power supply circuit includes an output voltage dependent over-current protection circuit unit and a drooping over-current protection circuit unit. The output voltage dependent over-current protection circuit unit reduces, when an output current which is output from an output terminal of an output control transistor exceeds a first set value which is determined in advance, the output current from the first set value in a manner dependent on a reduction of an output voltage which is output from the output terminal. The drooping over-current protection circuit unit detects, with an external resistor, the output current which is output from the output terminal of the output control transistor, and reduces, when the detected output current exceeds a second set value which is determined in advance and which has a lower value than the first set value, the output voltage while maintaining the output current at the second set value.
    Type: Application
    Filed: October 7, 2011
    Publication date: April 12, 2012
    Applicant: ON SEMICONDUCTOR TRADING, LTD.
    Inventor: Keizou Mizui