摘要:

AbstractAn algorithm is given for solving a set of underdetermined non‐linear functions where some or all unknown variables are confined within a certain interval. the functions must be described by piecewise linear models with virtually no restriction to the dimension of the functions or models. the algorithm is able to find all separate solution points of equations on well‐posed functions and can trace solution spaces, eventually composed of several disjunct branches, without any need for initial points. the presented methodology guarantees to find all solutions within a finite number of steps.In top‐down circuit design, at each level one must solve a set of underdetermined equations in such a way that the solution space, if non‐empty, is in agreement with solutions found earlier in the hierarchy. the presented algorithm can be used in such a hierarchical environment and guarantees to find all solutions at each level which are not in conflict with solutions found at higher

ISSN:0098-9886    

DOI:10.1002/cta.4490190202

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1991

数据来源: WILEY

摘要:

AbstractA higher‐order diffusion model for a bipolar transistor has been developed. This model is based on the Padé approximation of the quasi‐static expansions of the base and collector currents and gives improved accuracy for the simulation of fast transients and periodic operation at high frequencies. the effect of higher‐order circuit elements on accuracy is demonstrated by calculating the transient response to a step excitation and by determining the scattering parameters of a transistor model with higher‐order elements linearized about an operating point. the higher‐order model is replaced by an equivalent circuit including only conventional elements, and the transient behaviour of these two models i

ISSN:0098-9886    

DOI:10.1002/cta.4490190203

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1991

数据来源: WILEY

摘要:

AbstractA generalized time domain approach is described for the analysis and design of wave digital filters capable of performing sampling rate alterations whether integer or non‐integer. It is based on sequential computation of the filter's system response; then this discrete response is reduced to a rational function form. the proposed approach is characterized by its simplicity as well as its ability to analyse and design multistage, multirate wave digital structures. Illustrative examples are also give

ISSN:0098-9886    

DOI:10.1002/cta.4490190204

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1991

数据来源: WILEY

摘要:

AbstractThe primary goal of this paper is to solve some types of optimization problems whose objective functions and constraints are smooth and continuously differentiable and which are not suited for digital signal processing. the optimization problems are mapped into systems of first‐ and second‐order non‐linear ordinary differential equations and/or systems of difference equations. These systems of equations are simulated by appropriate switched‐capacitor (SC) circuits employing some neural network (neurobiological) principles. New switched‐capacitor architectures for on‐line solving of non‐linear optimization problems are proposed and their properties are investigated. Various circuit structures are investigated to find which are best suited for SC CMOS implementation. the structures developed exhibit a high degree of modularity, and a relatively small number of basic building blocks (computing cells) are required to implement effective and powerful optimization algorithms. Basic mathematical operations, e.g. multiplication, addition and non‐linear scaling transformation, are accomplished employing advanced SC techniques. the validity and performance of the circuit structures developed are illustrated by intensive computer simulations employing TUTSIM and

ISSN:0098-9886    

DOI:10.1002/cta.4490190205

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1991

数据来源: WILEY

摘要:

AbstractEfficient methods were previously given for measuring the frequency‐domain transfer functions, namely Volterra kernels of weakly non‐linear systems. the success of these methods depends crucially on the assumption that thehighest significant orderof the system under test is known. Practical algorithms for determining the highest significant order of non‐linear systems are presented in this paper. Our algorithm can be used not only to validate the measurement results obtained by the methods presented earlier but is also capable of determining whether a Volterra series representation actuallyexistsfor the system under

ISSN:0098-9886    

DOI:10.1002/cta.4490190206

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1991

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490190207

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1991

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490190201

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1991

数据来源: WILEY