Patent ID: 7319946
Filing Date: 2008-01-15
Classification: G06F

Abstract:
1. A method for evaluation of coupling noise and signal integrity of wiring on a chip with on-chip coupled noise verification using frequency dependent RLC extraction and simulation modeling comprising the steps of: performing an RL extraction process which employs a two dimensional (2-D) scan line algorithm which is used to determine coordinates of return path conductors' power and signal shapes whose length is perpendicular to the scan line by scanning both in the x and y direction for both voltage and ground in a radius on said chip determined by a user defined parameter for a power shape radius; within a user determined signal radius on said scan line locating adjacent signal conductors; and employing a scan line two dimensional (2-D) approximation of conductor shapes for parallel wiring for all planes where parallel wiring with respect to a target net exists for said determined return path conductors and said signal conductors; and wherein for pair adjacencies within said signal radious a two dimensional (2D) RL field solver resistance inductive calculation is performed using resistance and induction information to determine a best fit at multiple frequency points and wherein said field solver resistance inductive calculation provides multiple RL extraction results for each frequency as frequency dependent RL parameters; caching and reusing said synthesized circuits based on calculations using said frequency dependent RL parameters as a method to reduce calculation duplication at extracted shapes when identical physical data for 2D cross-section shapes results from use of the scan line algorithm; wherein frequency dependent RLC circuits for non-monotonic resistance frequency variation are synthesized by approximating a complex impedance function by a ration of polynomials as representative stable circuits; and wherein circuit netlisting procedures includes the circuit synthesis results as pair-wise coupling interactions; and wherein circuit netlisting procedures include the management of return path nodes of circuit synthesis results and referencing between input/output nodes of pair-wise coupling interactions and finding a set of poles and residures using resistance and inductance information using only real poles in a portion of a complex plane and in which the circuit elements are realizable.