Title :
RC trees revisited
Author :
Cirit, Mehmet A.
Author_Institution :
Silicon Compiler Syst., Liberty Corner, NJ, USA
Abstract :
RC tree approximation is a computationally simple method for calculating the signal delay of MOS circuits with several states of fanout. The author derives a formal solution of RC tree equations. Based on this solution, it is shown that even though waveforms found using RC tree approximation are inaccurate, delays are exact. The author derives the dependence of the delays on input waveforms and initial conditions, and he introduces criteria for estimating the accuracy of single-time-constant waveform approximation
Keywords :
VLSI; delays; field effect integrated circuits; integrated logic circuits; network analysis; trees (mathematics); MOS circuits; RC tree approximation; VLSI; fanout; field effect integrated circuits; signal delay; single-time-constant waveform approximation; Circuits; Differential algebraic equations; Eigenvalues and eigenfunctions; Linear algebra; Performance analysis; Propagation delay; Resistors; Symmetric matrices; Tiles; Timing;
Conference_Titel :
Custom Integrated Circuits Conference, 1988., Proceedings of the IEEE 1988
Conference_Location :
Rochester, NY
DOI :
10.1109/CICC.1988.20814
