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Passive-modeling-based circuit simulation method

A circuit simulation and electromagnetic simulation technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as the inability to obtain passive models of circuits, circuit simulation errors, etc., to shorten the time to market, improve efficiency and The effect of accuracy, improved reliability and circuit design efficiency

Inactive Publication Date: 2012-07-04
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

However, most of these methods have convergence problems, that is to say, it is impossible to obtain a passive model for some circuits by applying existing methods
For circuits with higher operating frequencies, a model that does not satisfy passivity will lead to errors in circuit simulation

Method used

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  • Passive-modeling-based circuit simulation method
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  • Passive-modeling-based circuit simulation method

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Embodiment Construction

[0036] The circuit simulation method based on passive modeling that the present invention proposes comprises the following steps:

[0037] (1) Using the electromagnetic simulation method, generate a data file for circuit simulation, the data file includes the environmental parameters of the electromagnetic simulation, the data format used to express the simulation results and the simulation results, according to the data file, use the vector simulation Combined method to establish the initial simulation model of the circuit;

[0038] (2) Correct the above initial simulation model to make the initial simulation model an initial passive model, and the correction method is as follows:

[0039] The initial passive model is obtained by using the characteristic root method of perturbing the Hamiltonian matrix;

[0040] Or use the coefficient method corresponding to the disturbance pole to obtain the initial passive model;

[0041] Or make the coefficient matrix D of the above-ment...

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Abstract

The invention relates to a passive-modeling-based circuit simulation method and belongs to the technical field of integrated circuit design. Firstly, an electromagnetic simulation method is adopted to generate a data file, and an initial simulation mode is built with the aid of a vector fitting method according to the data file; the initial simulation model is modified and changed to an initial passive model; the precision of a final passive model serves as an optimization target, a passive restriction serves as an optimization constraint condition, the initial passive model serves as the initial solution, and the finial passive model is obtained through an optimization algorithm; and the coefficient matrix of the final passive model is inputted to a circuit simulator, and the circuit parameter is obtained through calculation. The circuit simulation method provided by the invention improves the modeling precision, shortens the modeling time, improves the efficiency and precision of circuit simulation, and enhances the astringency of the circuit simulation. The circuit simulation method can be applied to the design of the integrated circuit, improves the reliability of the circuit simulation and the efficiency of the circuit design, and shortens the time of the circuit product to the market.

Description

technical field [0001] The invention relates to a circuit simulation method based on passive modeling, which belongs to the technical field of integrated circuit design. Background technique [0002] In the design verification process of circuits with high operating frequency, such as millimeter-wave circuits, it is an important step to establish a model for describing the electrical characteristics of circuit devices or sub-circuits based on electromagnetic simulation data for simulation. The circuit devices or sub-circuits mentioned here are generally passive. Passivity refers to the characteristic that the average power of a device or circuit is not greater than zero; electromagnetic simulation refers to the electromagnetic simulation of the circuit devices or sub-circuits that make up the circuit, and the input of the electromagnetic simulation is the components of these circuit devices or sub-circuits Geometry, construction, and operating environment. The output of ele...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 叶佐昌王天时余志平
Owner TSINGHUA UNIV
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