EFFICIENT APPROXIMATION OF THE TIME-DOMAIN RESPONSE OF LOSSY COUPLED TRANSMISSION-LINE TREES

A new technique for rapidly estimating the transient response of lossy transmission line interconnect structures is introduced, The new appr oach, Reciprocal Expansion (REX), is similar to Asymptotic Waveform Ev aluation (AWE) in that it approximates the interconnect by a low-order system, However, unlike AWE, REX expands the reciprocal of the transf er function as a Taylor series, REX has been extended to handle distri buted elements directly, compute crosstalk between coupled trees, and account for frequency dependent effects, Experimental results demonstr ate that for critical underdamped interconnects, REX provides better a ccuracy than AWE.