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Nonlinear circuit macro model extraction method and system and medium

A technology of nonlinear circuit and extraction method, which is applied in the field of nonlinear circuit macro model extraction, can solve the problem of insufficient simulation accuracy and reduce order error in the frequency domain, and achieve the effect of increasing simulation accuracy

Active Publication Date: 2021-06-11
SHANDONG YINGXIN COMP TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention mainly solves the problem of insufficient simulation accuracy and the possibility of introducing large errors when the order reduction in the frequency domain is converted to the time domain when the nonlinear circuit is simulated.

Method used

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  • Nonlinear circuit macro model extraction method and system and medium
  • Nonlinear circuit macro model extraction method and system and medium
  • Nonlinear circuit macro model extraction method and system and medium

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Embodiment 1

[0044] In the prior art, for the extraction of the macro model of the nonlinear circuit system, most of the processing methods are to select expansion points on the trajectory of the linear function to linearize, generate multiple linear subsystems, and use the combination of weight functions to obtain the segmental Linearized systems, for example, This formula is a mathematical model of a nonlinear circuit system, where x(t)∈R^(n×1) represents the node voltage or branch current in the circuit, and f(x(t)) represents the nonlinear function of the nonlinear circuit , b∈R^(n×1) represents the input matrix of the circuit system, u(t) represents the input of the circuit system, y represents the output of the circuit, c∈R^(1×n) represents the output matrix of the system, and E is The coefficient matrix is ​​composed of capacitance and inductance values, G is an association matrix, which represents the connection relationship between components in the circuit system, and n represen...

Embodiment 2

[0099] An embodiment of the present invention provides a nonlinear circuit macro model extraction system, please refer to Figure 5 ,include:

[0100] Expand point acquisition module, quadratic module and order reduction module;

[0101] The expansion point acquisition module is used to obtain the nonlinear circuit system, and select a number of expansion points according to the output trajectory of the nonlinear circuit system. The expansion point acquisition module divides the continuous nonlinear circuit system, and converts the divided nonlinear circuit system into Linear output, but this cannot meet the requirements of circuit simulation accuracy, so the nonlinearization needs to be quadraticized;

[0102] The quadratic module is equipped with a Taylor formula unit, because the Taylor formula is a formula that uses the information of a function at a certain point to describe its nearby values. If the function is smooth enough, when the derivative values ​​of each order o...

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Abstract

The invention discloses a nonlinear circuit macro model extraction method. The method comprises the following steps: acquiring an output track of a nonlinear circuit system and selecting a plurality of expansion points; generating a plurality of quadratic systems according to the expansion points, and generating a piecewise polynomial system of the nonlinear circuit system according to the plurality of quadratic systems; reducing the order of the segmented polynomial system by using an intra-time-domain model order reduction method, and constructing an order reduction matrix; and extracting the macro model of the nonlinear circuit system according to the reduced-order matrix. In this way, the simulation precision of a nonlinear circuit can be improved to a great extent, and errors possibly introduced by conversion between a frequency domain and a time domain are avoided in the macro model extraction process.

Description

technical field [0001] The invention relates to the technical field of circuit simulation, in particular to a method, system and medium for extracting a nonlinear circuit macro model. Background technique [0002] At present, the nonlinear circuit system composed of interconnection wires and nonlinear components occupies a dominant position in integrated circuits. As the operating frequency of integrated circuits becomes higher and higher, interconnection wires can no longer be regarded as simple metal wires. The distributed parameter theory of the transmission line is used to deal with it, which makes the mathematical model describing the circuit system more and more complicated, and the number of equations is also increasing, which makes the simulation and verification of the circuit design stage consume a lot of computing time. In order to solve this problem, Generally, the order reduction of the mathematical model is used to reduce the calculation time. However, due to t...

Claims

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Application Information

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IPC IPC(8): G06F30/3308
CPCG06F30/3308
Inventor 邱志勇郭振华赵雅倩陈永芳
Owner SHANDONG YINGXIN COMP TECH CO LTD
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