hspice compatible equivalent circuit simulation system and method

Abstract

The invention discloses an Hspice compatible equivalent circuit simulation system and method. The system comprises a data acquisition module, a parameter check module, a function generation module and an equivalent circuit generation module, wherein the data acquisition module is used for reading a multi-port circuit system data file in a Touchshone format from a data storage unit of a computer, and obtaining an S parameter matrix from the multi-port circuit system data file; the parameter check module is used for checking whether all S parameters in the S parameter matrix meet the circuit passive characteristic; the function generation module is used for setting extremum-residual value quantity required by a rational number function generating the S parameters, and system errors; and the equivalent circuit generation module is used for generating a rational number function matrix of the S parameters by using an extremum-residual value quantity-based executing vector fitting algorithm, and simulating and synthesizing the Hspice compatible equivalent circuit according to the rational number function matrix. By implementing the invention, the Hspice compatible equivalent circuit can be generated by using multi-port system data, thus the circuit simulation efficiency is increased and the problem of convergence of a simulation circuit can be solved.

Description

technical field [0001] The invention relates to a circuit simulation system and method, in particular to a Hspice compatible equivalent circuit simulation system and method. Background technique [0002] S parameters are widely used in package and printed circuit board (Printed Circuit Board, PCB) channel models. Through measuring instruments such as network analyzers, or full-wave type field effect solving software such as Ansoft's HFSS software, the S-parameters of the channel system to be tested can be extracted, and the equivalent full-wave model of the channel system can be obtained. Secondly, the accuracy of this equivalent system model is high, and it can be applied in the high-speed signal circuit simulation process. [0003] The Hspice circuit simulation software developed by Synopsys uses the Fourier Transform (InverseFourier Transform, IFT) calculation method to deal with the problem of the S-parameter model in the time domain. When the S-parameters are connecte...

AI Technical Summary

Problems solved by technology

When the S-parameters are connected with the system circuit, the process of time-domain simulation will consume a lot of processing time of the processor (such as CPU) so as to affect the speed of product development

Furthermore, the S parameter does not conform to the passive characteristics of the circuit (passivity), which will cause the simulation software to fail to achieve the convergence problem of the simulated circuit during the time domain solution process.

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