Analytical method and device for power ground network of integrated circuit

Abstract

The invention relates to an analytical method and a device for a power ground network of an integrated circuit. The method comprises the following steps: firstly, establishing a matrix circuit equation of the power ground network; then constructing a projection matrix by a nonhomogeneous Amoldi method, and carrying out contragradient transformation on the matrix circuit equation of the power ground network to obtain a reduced order system; and finally, solving the transient response of the reduced order system to obtain the analytical result. The device applying the method comprises an input unit, an output unit, a program storage unit, an external bus, a memory, a storage management unit, an input / output bridging unit, a system bus and a processor. NHAR programs realizing the analytical method of the invention are stored in the program storage unit, and the circuit characteristic data of the power ground network are analyzed through the NHAR program. By analyzing the power ground network by the invention, numerical values can be ensured to be stable in the computational process, and very high computational accuracy can be achieved by very low complexity of computation, thereby solving the problem that the stableness of the numerical value and the computational efficiency can not be compromised in the computational process of the current methods.

Description

technical field [0001] The invention belongs to the field of integrated circuits, and in particular relates to an analysis method and device for an integrated circuit power supply network. technical background [0002] The purpose of the power ground network in an integrated circuit is to provide current to the active devices in the integrated circuit at a stable voltage. With the continuous shrinking of ultra-large-scale integrated circuit (ULSI) feature size, the integration level, complexity and operating frequency of chips are greatly increased, and the reliability of power-ground network is becoming more and more important. The Ldi / dt noise, voltage drop (static or dynamic), electromigration (EM) and LC resonance of the power ground network wire will cause the voltage fluctuation of the power ground network, which will cause integrated circuit timing deviation, logic error, excessive power consumption, etc. , and even make the circuit invalid, and the chip cannot work ...

AI Technical Summary

Problems solved by technology

[0019] The object of the present invention is to provide a projection order reduction method and device with stable calculation process and high calculation efficiency to analyze the power ground network with a large number of independent current sources, and to solve the numerical stability and calculation problems in the existing method. The problem of incompatibility between efficiency

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