Patents by Inventor Ronald W. Choi

Ronald W. Choi 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).

  • Mask revision ID code circuit
    Patent number: 7120884
    Abstract: A mask identification (ID) bit circuit (100) is disclosed that provides one of two potentials (VGND or VPWR) to a sense node (108). A mask ID bit circuit (100) may include a number of links (102-0 to 102-4) arranged in series. A link (102-0 to 102-4) may include inputs (104-0 and 104-1) and outputs (106-0 and 106-1). In one configuration, inputs (104-0 and 104-1) may be directly coupled to outputs (106-0 and 106-1). In another configuration, inputs (104-0 and 104-1) may be cross coupled to outputs (106-0 and 106-1). Cross coupling inputs (104-0 and 104-1) and outputs (106-0 and 106-1) of a link (102-0 to 102-4) can switch a potential (VGND or VPWR) supplied to a sense node (108). The configuration of more than one link (102-0 to 102-4) of a mask ID bit circuit (100) can be changed, allowing a sense node to be switched between two potential (VGND and VPWR) multiple times. According to an embodiment, n mask ID bit circuits (100) may provide as many as 2n different mask ID codes.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: October 10, 2006
    Assignee: Cypress Semiconductor Corporation
    Inventors: Robert M. Reinschmidt, Ronald W. Choi
  • Mask revision ID code circuit
    Publication number: 20020084331
    Abstract: A mask identification (ID) bit circuit (100) is disclosed that provides one of two potentials (VGND or VPWR) to a sense node (108). A mask ID bit circuit (100) may include a number of links (102-0 to 102-4) arranged in series. A link (102-0 to 102-4) may include inputs (104-0 and 104-1) and outputs (106-0 and 106-1). In one configuration, inputs (104-0 and 104-1) may be directly coupled to outputs (106-0 and 106-1). In another configuration, inputs (104-0 and 104-1) may be cross coupled to outputs (106-0 and 106-1). Cross coupling inputs (104-0 and 104-1) and outputs (106-0 and 106-1) of a link (102-0 to 102-4) can switch a potential (VGND or VPWR) supplied to a sense node (108). The configuration of more than one link (102-0 to 102-4) of a mask ID bit circuit (100) can be changed, allowing a sense node to be switched between two potential (VGND and VPWR) multiple times. According to an embodiment, n mask ID bit circuits (100) may provide as many as 2n different mask ID codes.
    Type: Application
    Filed: December 29, 2000
    Publication date: July 4, 2002
    Inventors: Robert M. Reinschmidt, Ronald W. Choi