Accurate characterization of lossy interconnects from TDR waveforms

This paper proposes an accurate solution to characterize the lossy interconnects with discontinuities from TDR waveforms. A new lossy peeling algorithm is proposed to determine the interconnect impedance of lossy structures. An efficient fitting algorithm is applied to extract the W-element model of a lossy structure from an initial impedance profile extracted by a lossless peeling algorithm. The proposed method also improves the accuracy of late time response which has been difficult to achieve by previous algorithms. The approach presented in this paper is able to recover the impedance profiles of complicated lossy structures.