Method for establishing high-frequency SPICE model of multi-resonance-point capacitor

Abstract

The invention discloses a method for establishing a high-frequency SPICE model of a multi-resonance-point capacitor, which is applied to the field of electronic component modeling, and aims to solve the problem that the modeling of the high-frequency model of the multi-resonance-point capacitor cannot be well solved in the prior art. The method comprises the following steps: measuring an impedancecurve of a capacitor through an impedance analyzer; obtaining impedance data of the capacitor; determining a high-frequency equivalent circuit model according to the impedance curve in the S1; obtaining an amplitude-frequency expression of impedance according to the high-frequency equivalent circuit model; further, according to the impedance data of the capacitor and the amplitude-frequency expression, using a least square method and a particle swarm intelligent optimization algorithm for solving, and obtaining optimal equivalent circuit parameters; and finally, writing the equivalent circuitparameters into a corresponding SPICE model according to an equivalent circuit.

Description

technical field [0001] The invention belongs to the field of modeling of electronic components, in particular to a high-frequency SPICE model building technology. Background technique [0002] As a passive electronic device, capacitors are widely used in various electronic products, and play an important role in tuning, bypassing, coupling, filtering and other circuits. For example, it is useful for tuning circuits of transistor radios, and it is also needed for coupling circuits and bypass circuits of color TV sets. [0003] In electromagnetic compatibility, capacitors are also often used for filtering to reduce the impact of electromagnetic interference on sensitive equipment. In EMC simulation, SI, PI and other circuit simulations and field-circuit co-simulation, it is necessary to consider the high-frequency characteristics of the actual capacitor. At this time, it is often necessary to pay attention to its high-frequency parasitic parameters and establish a correspondi...

AI Technical Summary

Problems solved by technology

[0007] 1. The high-frequency model of the actual multi-resonance point capacitance cannot be accurately established;

[0008] 2. The high-frequency model is not packaged into a model file, which makes it inconvenient to use;

[0009] 3. The applicable frequency range of the established model is narrow, and the model parameters have no actual physical meaning;

[0010] 4. The existing non-linear fitting method of equivalent circuit parameters has difficulty in solving the optimal equivalent circuit parameters of complex circuit models, slow speed and poor solution effect

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