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The authors present a novel wire duplication-based interconnect modeling technique. The proposed modeling technique exploits the sparsity of the L-1 matrix, where L is the inductance matrix, and constructs a sparse and stable equivalent circuit by windowing the original inductance matrix. The resulting circuit model is sparse and exhibits the same stability property as the K method. Numerical results show that the proposed wire duplication model has high accuracy and is more efficient than many existing techniques.