A Novel Time-Domain CAD Technique Based on Automatic Time-Slot Division for the Numerical Simulation of Highly Nonlinear RF Circuits

Ferreira, David; Oliveira, Jorge F.; Pedro, José

doi:10.1109/tmtt.2013.2293481

Cited by 6 publications

(5 citation statements)

References 25 publications

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“…As another example to test the applicability and performance of our method, we consider the ASK/OOK wireless transmitter shown in Fig. 7 and described in detail in [37]- [39]. The circuit is modeled by N = 8 ODEs and, as in [39], the drainsource current i DS of the MOSFETs and the current i D of the diode are given by the following simplified nonlinear models:…”

Section: Ask/ook Rf Modulatormentioning

confidence: 99%

See 1 more Smart Citation

Application of Envelope-Following Techniques to the Shooting Method

Linaro¹,

Giudice²,

Brambilla³

et al. 2020

IEEE Open J. Circuits Syst.

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We consider circuits driven by two or more signals with very different periods and propose a method to determine their steady state solution in the time domain. We present a new version of the shooting method based on the envelope following technique. We show how to use the envelope following method as the new engine to efficiently determine the trajectory of the circuit starting from the new guess of the initial conditions. It substitutes the less efficient time domain analysis used in the conventional implementation of the shooting method. We show that it is well suited to circuits where the ratio between the periods of the slow and fast behaviour is particularly high and characterised by strong non-linearities.The numerical properties at the basis of the proposed method are presented. Its features are shown by simulating different types of slow-fast circuits.INDEX TERMS Slow-fast circuit, shooting method, envelope following method, time domain circuit simulation, multi-tone driven circuit, circuit simulation.

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Section: Ask/ook Rf Modulatormentioning

confidence: 99%

“…7 and described in detail in [37]- [39]. The circuit is modeled by N = 8 ODEs and, as in [39], the drainsource current i DS of the MOSFETs and the current i D of the diode are given by the following simplified nonlinear models:…”

Section: Ask/ook Rf Modulatormentioning

confidence: 99%

Application of Envelope-Following Techniques to the Shooting Method

Linaro¹,

Giudice²,

Brambilla³

et al. 2020

IEEE Open J. Circuits Syst.

View full text Add to dashboard Cite

show abstract

“…One can find papers dealing with the complete replacement of numerical integration by another method, in this case, based on the neural network [6]. By modifying the calculation of the predictor and the corrector [7,8], papers publishing different methods for determining the integration step [9,10], and a paper modifying the calculation method using logarithmic damping [11], all of these papers, as well as this paper, share the common goal of speeding up or refining the calculation of numerical integration. Although many papers have been published on this topic, few methods are suitable for the simulation of electrical circuits.…”

Section: Introductionmentioning

confidence: 99%

“…The method loses accuracy on smooth parts which in turn affects the increase in the number of integration steps. The paper [10] presents a method for calculating the integration step specifically designed for circuits where the stimulus value is turned off for some time. The algorithm even achieves up to twice the convergence of the standard SPICE program.…”

Section: Introductionmentioning

confidence: 99%

Deep Learning Neural Network Algorithm for Computation of SPICE Transient Simulation of Nonlinear Time Dependent Circuits

Cerny

Dobeš

2021

Electronics

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In this paper, a special method based on the neural network is presented, which is conveniently used to precompute the steps of numerical integration. This method approximates the behaviour of the numerical integrator with respect to the local truncation error. In other words, it allows the precomputation of the individual steps in such a way that they do not need to be estimated by an algorithm but can be directly estimated by a neural network. Experimental tests were performed on a series of electrical circuits with different component parameters. The method was tested for two integration methods implemented in the simulation program SPICE (Trapez and Gear). For each type of circuit, a custom network was trained. Experimental simulations showed that for well-defined problems with a sufficiently trained network, the method allows in most cases reducing the total number of iteration steps performed by the algorithm during the simulation computation. Applications of this method, drawbacks, and possible further optimizations are also discussed.

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“…The most often it is the simulation of various DC-DC circuits, but many other articles have been published for enhancing core to simulate magnetic features or another circuit behavior and effects. From recent works focused on strengthening simulation core we can mention [10][11][12][13][14][15][16][17]. It could be seen this is very active field of development.…”

Section: Introductionmentioning

confidence: 99%

Efficient Procedure Improving Precision of High Conditioned Matrices in Electronic Circuits Analysis

Cerny¹,

Dobeš²,

Banas³

2018

RADIOENGINEERING

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In this article, we propose several improvements that could be done to SPICE simulator. The first is based on a functional implementation of device models. The advantages of functional implementation are demonstrated on basic Shichman-Hodges model of MOS transistor. It starts with a description of primary algorithms used in SPICE simulator for the solution of circuits with nonlinear devices and identify the problems that can occur during simulations. Main part of the article is devoted to improved factorization procedure for simulation of the nonlinear electronic circuits. The primary intention of the proposed method is to increase final precision of the result in a case of high condition linear systems. The procedure is based on a use of the iterative methods for solution of nonlinear and linear equations. Utilizing those methods for one iterative process helps to reduce memory consumption during simulation computation, and it can significantly improve simulation precision. The procedure allows to use enumeration with definable precision in a very efficient way.

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A Novel Time-Domain CAD Technique Based on Automatic Time-Slot Division for the Numerical Simulation of Highly Nonlinear RF Circuits

Cited by 6 publications

References 25 publications

Application of Envelope-Following Techniques to the Shooting Method

Application of Envelope-Following Techniques to the Shooting Method

Deep Learning Neural Network Algorithm for Computation of SPICE Transient Simulation of Nonlinear Time Dependent Circuits

Efficient Procedure Improving Precision of High Conditioned Matrices in Electronic Circuits Analysis

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