Accurate simulation of large interconnect networks has become a necessity t
o address signal integrity issues in high-speed designs. Recently, several
model-reduction techniques based on Krylov-space methods have been proposed
for efficient simulation of large linear networks, However, these methods
treat the distributed networks in terms of their lumped representations. In
order to overcome this difficulty, a new technique based on congruent tran
sformation is presented in this paper to directly include distributed syste
ms described by Telegrapher's partial differential equations.