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High speed high precision transient simulation method able to process tree net hybrid power supply structure in VLSI

A technology of mixed power supply and simulation method, which is applied in the direction of electrical digital data processing, special data processing applications, circuits, etc., and can solve problems such as inability to effectively deal with irregular topological structures and multiple power supplies

Inactive Publication Date: 2005-01-12
TSINGHUA UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problem that conventional simulation methods cannot effectively deal with irregular topological structures and multiple power supplies, and has high simulation accuracy

Method used

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  • High speed high precision transient simulation method able to process tree net hybrid power supply structure in VLSI
  • High speed high precision transient simulation method able to process tree net hybrid power supply structure in VLSI
  • High speed high precision transient simulation method able to process tree net hybrid power supply structure in VLSI

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Embodiment Construction

[0092] This method has been developed and realized as a high-performance simulation program in unix environment by using C language. The simulation program takes the electrical parameter description file of the power supply network given in the form of Spice netlist as input, and finally gives the voltage and current distribution of each power supply node on the power supply network at each moment by interactively inputting parameters such as simulation time and simulation step size. as output.

[0093] The specific implementation environment is as follows:

[0094] Hardware system: Sun V880 WorkStation with 4CPU at 800MHz, 2GB Memory

[0095] Operating system: Sun Solaris 5.0

[0096] Programming language: ANSI C

[0097] Compiler: GNU gcc Version: 3.3.1

[0098] Program debugging tool: GNU gdb version: 6.0

[0099] Auxiliary build tool: GNU make version: 3.79.1

[0100] The workflow of the simulation program is described below:

[0101]1. The...

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Abstract

The method is capable of carrying out transient state emulation for hybrid power supply network by mixing tree and network in any proportion quickly. Comparing with general emulation method, the invention can treat irregular topological structure and multiple power supply source, considering input of resistance, capacitance, and inductance as stray parameter so as to provide high precision of emulation. Pretreatment technique and quick argument elimination technique based on incomplete Cholesky decomposition is adopted in the invention. Advantages are: raising efficiency greatly, high precision of emulation and stability of data, emulation of network of power source / ground wires in large scale independent on topology. The invention is also applicable to passive clock line, bus and signal network in IC.

Description

technical field [0001] The electrical characteristic simulation of very large scale integration (VLSI) power supply network belongs to the field of physical layout design in VLSI manufacturing process. It is a core sub-process that must be relied upon to design and optimize the power ground network of an integrated circuit. The efficiency and accuracy of this process will directly affect the design cycle of the entire chip, the performance and life of the finished chip, and due to the The similarity of circuit board (PCB), this method is also suitable for the simulation analysis of the power supply network on the high-frequency PCB. Background technique [0002] 1. The importance of chip power supply network design [0003] With the continuous improvement of the VLSI manufacturing process, the characteristic line width of the finished chip is continuously shrinking, and the integration density and operating frequency of the chip are also greatly increased. In such an envir...

Claims

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Application Information

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IPC IPC(8): G06F17/50H01L21/82
Inventor 洪先龙蔡懿慈师进骆祖莹
Owner TSINGHUA UNIV
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