摘要:

AbstractIn this paper a novel method is described for the design of adaptive IIR filters used in system identification. the adaptive filter is implemented as a parallel connection of subsections whose transfer functions constitute a set of discrete orthogonal systems. the adaptation algorithm used, which is of the Gauss‐Newton type, adjusts the parameters of these discrete orthogonal systems in order to match the desired output data of the unknown plant in a least squares sense. Owing to the orthogonality property, which ensures complete independence of subsequent sections, convergence is very rapid. Closed‐form expressions for the gradient signals required to update the filter are given. Illustrative examples have shown that this method always results in much improved adaptation properties compared with the already existing approac

ISSN:0098-9886    

DOI:10.1002/cta.4490210402

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

年代:1993

数据来源: WILEY

摘要:

AbstractA synthesis procedure based on the signal flow graph is given for generating second‐order active filters using a minimum number of operational transconductance amplifiers and grounded capacitors. the pole quality factor and pole frequency sensitivities are studied for the proposed filters. Furthermore, the limitations on input signal amplitude are studied and a simple formula is derived for the input signal amplitude not causing clipping and slew‐rate‐limiting pro

ISSN:0098-9886    

DOI:10.1002/cta.4490210403

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

年代:1993

数据来源: WILEY

摘要:

AbstractOn the basis of signal flow graphs a general method is described for the design of stray‐insensitive switched capacitor networks. to be able to choose the optimum one, the method involves the search of all possible topologies for the specially formed signal flow graph of the givenz‐domain transfer function and is easily implemented by digital compu

ISSN:0098-9886    

DOI:10.1002/cta.4490210404

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

年代:1993

数据来源: WILEY

摘要:

AbstractA linear transformation of transfer function variables is applied in order to transform a non‐monic multivariable polynomial to a monic form and a singular state space Roesser model to a non‐singular mo

ISSN:0098-9886    

DOI:10.1002/cta.4490210405

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

年代:1993

数据来源: WILEY

摘要:

AbstractAs pressures increase on VLSI designers to use a lower supply voltage of 3.3 V rather than the present 5 V, current mode signal‐processing techniques will surely become increasingly important and attractive. This paper presents the design of a reference‐generating (RG) circuit which employs a current mode divide‐by‐two circuit. Current dividers are usually implemented by using resistor networks or weighted transistors. the division accuracy of such solutions is limited by resistor or transistor mismatch. In this study the proposed divide‐by‐two circuit does not rely on well‐matched components and high‐gain op amps to achieve high accuracy. This paper also addresses the relationship among the operation and accuracy of the division process, the transistor mismatch and the resolution of a converter which employs the RG circuit. the proposed RG circuit can be implemented not only for medium‐speed successive approximation current mode A/D converters but also for A/D converter arrays achieving a hig

ISSN:0098-9886    

DOI:10.1002/cta.4490210406

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

年代:1993

数据来源: WILEY

摘要:

AbstractAn approach to modelling DC‐DC converter circuits based on graph theoretic concepts is discussed in this paper. the DC‐DC converter circuits are treated as networks containing switches, with the magnitudes of their associated eigenvalues much smaller than the switching frequency. the procedure for modelling this class of networks essentially involves separating the original network into twoN‐port networks, one containing those branches responsible for all phenomena peculiar to the switching action and the other containing the remaining branches of the network. the twoN‐port networks thus formed lead to a systematic and convenient way of developing low‐frequency circuit models for DC‐DC convert

ISSN:0098-9886    

DOI:10.1002/cta.4490210407

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

年代:1993

数据来源: WILEY

摘要:

AbstractThis paper is concerned with utilizing neural networks and analogue circuits to solve constrained optimization problems. We propose a novel neural network architecture for solving a class of non‐linear programming problems. the proposed neural network is then used, and if necessary modified, to solve minimum norm problems subject to linear constraints. Minimum norm problems have many applications in various areas, but we focus on their applications to the control of discrete dynamic processes. the applicability of the proposed neural network is demonstrated on numerical example

ISSN:0098-9886    

DOI:10.1002/cta.4490210408

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

年代:1993

数据来源: WILEY

摘要:

AbstractThis paper presents a method to analyse noise in cascaded non‐linear stages based on Volterra series for multiport systems. the cascaded stages are partitioned such that internal noise sources from different stages are uncorrelated and linear loading between all stages can be assumed. This partitioning scheme implies that the ensemble average of the magnitude‐squared output response from the last stage in the cascade can be determined as a sum of noise contributions from the individual stages. the method allows both unmodulated (independent) and modulated (dependent) noise sources. A special case of the theory and two related examples are presented to illustrate the met

ISSN:0098-9886    

DOI:10.1002/cta.4490210409

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

年代:1993

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490210410

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

年代:1993

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490210411

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

年代:1993

数据来源: WILEY