Cadence Design Systems, Inc.

Steve Russo

Randall Scott Lawson

Ken Wadland

Sean Bergan

Richard Woodward

William Schilp

Charles Winston Grant

Glendine Kingsbury

Kota Sujan Reddy

Davis Tsai

Keith Woodward

Jia Wu

Richard Allen Woodward, Jr

Jelena Radumilo-Franklin

Jelena Radumilo-Frankilin

Alan G Strelzoff

David Tsai

In one embodiment of the invention, an object oriented autorouter is disclosed for routing nets in a circuit. The object oriented autorouter includes a routing data model (RDM); at least one routing engine, such as a single connection router (SCR), a topographical (TOPO) transformation engine, and a detail geometric (DETAIL) engine, and a command and control module (CCM) coupled together. The RDM reads and write data with a design database as well as reading one or more object oriented design constraints. Each of the routing engines have at least one action to operate on the design database to improve compliance of the circuit to a constraint. The CCM controls the overall routing process of the nets in the circuit and includes at least one director to invoke at least one of the routing engines to achieve compliance with one or more constraints.

Systems for automatic circuit routing with object oriented constraints

A method and system for auto-routing wiring within a PCB. In some embodiment, a first broad region within a first layer and a counterpart first broad region within a second layer are defined. The counterpart regions define a first broad via location. In some embodiments, the first and second broad via locations of the first and second layers can then be subdivided into a plurality of triangular regions. The triangular regions on the first and second layers can then be compared to more accurately locate an appropriate via location.

Method and mechanism for implementing PCB routing

Circuit autorouter with object oriented constraints

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Holden, MA, United States of America

Steve Russo