Patents Assigned to Altos Design Automation, Inc.
  • Patent number: 7937256
    Abstract: A method of efficient library characterization of a circuit of a logic gate having a plurality of transistors and a plurality of nodes defining interconnection points in the circuit is disclosed. The method includes determining a plurality of vectors for a plurality of arcs. Each of the plurality of vectors represents possible data bits to inputs and nodes of the logic gate. The method selects a plurality of substantially distinct vectors from the plurality of vectors for each of the plurality of arcs, and performs circuit pruning for each of the plurality of substantially distinct vectors, taking each one substantially distinct vector at a time. The circuit pruning includes identifying an active circuit for each vector. The active circuit is identified by determining which circuit features are activated when applying a particular one of the substantially distinct vectors. Then, the circuit simulations limited to a plurality of transistors in the active circuit are performed.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: May 3, 2011
    Assignee: Altos Design Automation, Inc.
    Inventors: Ken Tseng, Kevin Chou
  • Publication number: 20110087478
    Abstract: A method of efficient library characterization of a circuit of a logic gate having a plurality of transistors and a plurality of nodes defining interconnection points in the circuit is disclosed. The method includes determining a plurality of vectors for a plurality of arcs. Each of the plurality of vectors represents possible data bits to inputs and nodes of the logic gate. The method selects a plurality of substantially distinct vectors from the plurality of vectors for each of the plurality of arcs, and performs circuit pruning for each of the plurality of substantially distinct vectors, taking each one substantially distinct vector at a time. The circuit pruning includes identifying an active circuit for each vector. The active circuit is identified by determining which circuit features are activated when applying a particular one of the substantially distinct vectors. Then, the circuit simulations limited to a plurality of transistors in the active circuit are performed.
    Type: Application
    Filed: December 16, 2010
    Publication date: April 14, 2011
    Applicant: Altos Design Automation, Inc.
    Inventors: Ken Tseng, Kevin Chou
  • Publication number: 20080133202
    Abstract: A method of efficient library characterization of a circuit of a logic gate having a plurality of transistors and a plurality of nodes defining interconnection points in the circuit is disclosed. The method includes determining a plurality of vectors for a plurality of arcs. Each of the plurality of vectors represents possible data bits to inputs and nodes of the logic gate. The method selects a plurality of substantially distinct vectors from the plurality of vectors for each of the plurality of arcs, and performs circuit pruning for each of the plurality of substantially distinct vectors, taking each one substantially distinct vector at a time. The circuit pruning includes identifying an active circuit for each vector. The active circuit is identified by determining which circuit features are activated when applying a particular one of the substantially distinct vectors. Then, the circuit simulations limited to a plurality of transistors in the active circuit are performed.
    Type: Application
    Filed: November 20, 2007
    Publication date: June 5, 2008
    Applicant: Altos Design Automation, Inc.
    Inventors: Ken Tseng, Kevin Chou