Patents by Inventor Chen-Ping Yuan

Chen-Ping Yuan 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: 6289412
    Abstract: A process is provided for generating a synoptic layout database for efficient layout parasitic extraction and circuit simulation in post-layout verification of an integrated circuit (IC) design for a system having a plurality of repetitive subcircuits. The process includes the steps of: receiving an input layout database including a plurality of geometric objects including cells representing the IC design, each of the cells including a plurality of polygons; identifying a plurality of repetitive cells of the input layout database, the repetitive cells being associated with the repetitive sub-circuits; recognizing at least one pattern of the repetitive cells; defining at least one cut region of the input layout database, the cut region being defined by physical layout coordinates, the cut region intersecting a corresponding pattern of the repetitive cells; and generating a synoptic layout database.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: September 11, 2001
    Assignee: Legend Design Technology, Inc.
    Inventors: Chen-Ping Yuan, Che-Cheng Lin, You-Pang Wei
  • Patent number: 6249901
    Abstract: An automatic memory characterization system for determining timing characteristics associated with each of a plurality of circuit instances of a memory compiler circuit design includes: an automatic circuit reduction tool for receiving a circuit netlist extracted from layout data defining a circuit instance of the memory compiler, and for generating a critical path netlist; a memory storage unit for storing a timing parameter database including a script file having memory characterization instructions, and at least one specification file associated with one of the timing characteristics to be characterized for the circuit instance, the specification file having a plurality of input signal parameters defining a plurality of input signals to be applied to selected input nodes of the circuit instance, and a plurality of output loading parameters defining a plurality of output loads to be applied to selected output nodes of the circuit instance; a stimulus generator responsive to the input signal parameters and o
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: June 19, 2001
    Assignee: Legend Design Technology, Inc.
    Inventors: Chen-Ping Yuan, Hung-Ta Wei, You-Pang Wei