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 involves the field of integrated circuit design, and especially involves a type of power network simulation method and system on the power network simulation. Background technique [0002] In the design of large -scale integrated circuits, each component must be able to obtain normal power supply voltage.The analysis method of high -efficiency and accurate power supply network is of great significance for the design and optimization of the power supply network. [0003] The power supply network can be regarded as a network composed of nodes formed by the resistance branches formed by the electrical metal wiring and the cross point of the metal wiring. The static simulation analysis of the power supply network is aimed at such a pure resistance network model.The law of Fuqi and Kirhoff's current law, the electrical characteristics of the entire network meet a series of linear equation groups. This linear equation group can be formally turned in...

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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