Patent ID: 7496485

Claim:
A method for analyzing a circuit with transmission lines, comprising the following steps performed on a computer: obtaining one or more transmission line parameters of said circuit; obtaining intrinsic behavior, E(ω), and strength of coupling, N(ω), of each of said transmission lines, wherein ω is an operating frequency measured in radians per second; obtaining a relative error bound for said circuit based on said intrinsic behavior, E(ω), and strength of coupling, N(ω), of said transmission lines; obtaining a predefined error threshold; iterating one or more of said obtaining steps until said relative error bound satisfies said error threshold, wherein said relative error bound, ρ n (ω), is expressed as: ρ n ⁡ ( ω ) = ⁢ exp ⁡ ( - L ⁢  N ⁡ ( ω )  ⁢ E ⁡ ( ω ) ) ⁢ ⁢ max x ∈ [ 0 , L ] ⁢  R ( n ) ⁡ ( x , ω )  ≤ ⁢ L n + 1 ( n + 1 ) ! ⁢  N ⁡ ( ω )  n + 1 ⁡ [ E ⁡ ( ω ) ] n + 2 where n is the iteration number and L is the line length of said transmission lines, wherein R is a residual error; and providing said relative error bound to analyze said circuit.