Essential Electronic Design Automation (EDA)

Extraction and Timing Analysis Tools

Larry:

Once placement and routing has been done, all the transistor and wire physical dimensions are known. Extraction and analysis tools use these dimensions to calculate key parameters. Parameters include things like transistor size, wire thickness and length, and effects from nearby wires. (These were just estimated in the FE design.) Some of these computations are very complex, involving two- and three-dimensional models. Delay calculators use detailed models to calculate the critical signal delays down each path. They take into account the wires, transistor drive, and number of gates driven. There are several “standard” delay models in use. The calculated parameters are entered into the design files. The ...