Title :
Evaluating RC-interconnect using moment-matching approximations
Author :
Gopal, Nanda ; Neikirk, Dean P. ; Pillage, Lawrence T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
Abstract :
The authors describes a relation for specifying the ´optimal´ number of lumped RC sections needed to approximate a distributed RC element for an estimated digital-signal bandwidth. The bandwidth approximation also aids in determining the order of the AWE (asymptotic waveform evaluation) approximation for the driving-point and transfer function models. Since moving to arbitrarily high orders of approximation to meet the bandwidth requirements is complicated by moment-matching instability problems, a constrained mapping from moments to dominant time constants is used which guarantees stability for RC interconnect models.<>
Keywords :
circuit analysis computing; transfer functions; waveform analysis; RC-interconnect; asymptotic waveform evaluation; bandwidth approximation; digital-signal bandwidth; distributed RC element; dominant time constants; driving point model; lumped RC sections; moment-matching approximations; moment-matching instability; stability; transfer function models; Analytical models; Bandwidth; Circuit analysis computing; Circuit simulation; Delay effects; Integrated circuit interconnections; Integrated circuit modeling; Linear approximation; Propagation delay; Timing;
Conference_Titel :
Computer-Aided Design, 1991. ICCAD-91. Digest of Technical Papers., 1991 IEEE International Conference on
Conference_Location :
Santa Clara, CA, USA
Print_ISBN :
0-8186-2157-5
DOI :
10.1109/ICCAD.1991.185195
