Patents by Inventor Sooin Jo

Sooin Jo 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: 5036227
    Abstract: The row address strobe signal input buffer, or "chain pre-charge" circuit, includes a pad receiving a row address strobe signal (RAS). A Schmitt trigger receives the RAS signal from the pad, and is responsive to a start-up signal. A control section responds to the start-up signal and the output thereof is connected to the output of the Schmitt trigger. A NAND gate and inverters are connected to the output of the control section. A first pre-charge circuit, connected between the pad and the Schmitt trigger, prevents a floating state at the time of initial power source voltage supply. A second pre-charge circuit, connected to an input of one of the inverters which provides the output of the row address strobe signal input buffer, also helps prevent the floating state.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: July 30, 1991
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sooin Jo, Jaiwhan Yu