Other

Mentor Graphics Corporation

Shrinath Thelapurath

Roberto Suaya

Rafael Escovar

Salvador Ortiz

Dusan Petranovic

Exemplary impedance extraction methods, systems, and apparatus are described herein. In one exemplary embodiment, for instance, a signal-wire segment of a circuit layout is selected. A predetermined number of return paths are identified for the selected signal-wire segment. The selected signal-wire segment and the identified return paths are further segmented into a plurality of bundles, which comprise signal-wire subsegments and one or more associated return-path subsegments that are parallel to and have the same length as the signal-wire subsegments. Loop inductance values and loop resistance values are determined and stored for the signal-wire subsegments in the bundles for at least one frequency of operation. Computer-readable media storing computer-executable instructions for causing a computer to perform any of the disclosed methods or storing data or information created or modified using any of the disclosed techniques are also disclosed.

Extracting high frequency impedance in a circuit design using an electronic design automation tool

Exemplary impedance extraction methods, systems, and apparatus are described herein. In one exemplary embodiment, at least a portion of a circuit description indicative of a circuit layout is loaded. A signal-wire segment is selected. Loop inductance values and loop resistance values for the signal-wire segment are determined at at least a first frequency of operation and a second frequency of operation. Values for one or more inductance components and one or more resistance components of a broadband representation of the signal-wire segment are computed and stored. In this embodiment, the broadband representation comprises at least one but no more than two parallel-coupled resistance components and inductance components. Computer-readable media storing computer-executable instructions for causing a computer to perform any of the disclosed methods or storing data or information created or modified using any of the disclosed techniques are also disclosed.

Growing community of inventors

Wilsonville, OR, United States of America

Shrinath Thelapurath