Through hole processing method and through hole processing system for on-chip power supply network simulation

Abstract

The invention discloses a through hole processing method and a through hole processing system for on-chip power supply network simulation. The through hole processing method includes the steps: 1, calculating total current I total of an on-chip power supply network; 2, calculating the total number NUM (l-1) l of through holes from a first metal wiring layer to an I-1st metal wiring layer; 3, if I total / NUM (l-1) l X (rj) (l-1) l <=epsilon X mu, ignoring the jth through hole from the first metal wiring layer to the I-1st metal wiring layer, otherwise, retaining the jth through hole from the first metal wiring layer to the I-1st metal wiring layer; and 4, modifying a circuit topology graph after ignoring the through hole. The (rj) (l-1) l is a jth through hole resistor from the first metal wiring layer to the I-1st metal wiring layer, l refers to an positive integer, epsilon refers to solving accuracy, and mu refers to a multiplying factor. By the aid of the method and the system, through-hole processing can be self-adaptively realized according to the solving accuracy epsilon and the multiplying factor mu, circuit topology is updated by means of disjoint set technology, and a formed simulation matrix no longer has strong morbidity, so that astringency and stability of problems to be solved can be enhanced.

Description

technical field [0001] The invention relates to the field of integrated circuit design, in particular to a through-hole processing method and system for on-chip power supply network simulation. Background technique [0002] In VLSI design, each component must be able to get a normal power supply voltage. Efficient and accurate analysis methods of power supply network are of great significance to the design and optimization of power supply network. [0003] The power supply network can be regarded as a network composed of resistive branches formed by power supply metal traces and nodes formed by metal trace intersection through-holes. The static simulation analysis of the power supply network is aimed at such a purely resistive network model. The electrical characteristics of the entire network satisfy a series of linear equations, which can be formalized into matrix equations, and the linear system can be quickly obtained through advanced sparse linear system solution techn...

AI Technical Summary

Problems solved by technology

However, since the power supply network is not a regular grid-like topology structure, due to the existence of a large number of complex shapes such as IP modules in the circuit, the structure of the power supply network is complex, and there are many extreme cases, such as via resistance, etc. The introduction of these extreme cases will It leads to the ill-conditioned problem of the above-mentioned linear system, which affects the convergence and stability of the power supply network simulator, and brings certain difficulties to the simulation method

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