摘要:

AbstractSufficient conditions for the unique solvability of linear active networks modelled asRLCnullor networks are given. an interpretation of these sufficient conditions in terms of subnetworks of the network being studied is also given. A simple procedure for calculating the matrices involved in these sufficient conditions is described and illustrated by example.

ISSN:0098-9886    

DOI:10.1002/cta.4490110102

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

年代:1983

数据来源: WILEY

摘要:

AbstractNumerical convolution operations, executed on noise contaminated signals, are approximated by FIR digital filters in such a way that the effect of random coloured noise is minimized. Using elementary Hilbert space techniques, the filter functions of certain least‐weighted‐squares digital filters are derived explicitly by the use of discrete orthogonal functions (e.g. Hahn polynomials). the approach is suitable especially for narrowband operations such as smoothing, narrowband differentiation, and narrowband deconvolution (resolution enhancement). Examples of linear‐phase lowpasses with monotone passband, obtained with the aid of Hahn polynomials, are discussed in detail. Also the well‐known maximally flat digital lowpasses which can be derived with the aid of Krawtchouk polynomials, and narrowband differentiators are considered. In the case of least‐weighted‐squares approximation by Hahn polynomials, powerful recursive realizations can be developed to reduce computational r

ISSN:0098-9886    

DOI:10.1002/cta.4490110103

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

年代:1983

数据来源: WILEY

摘要:

AbstractLimitations on active‐Rfilter pole displacements are studied. the maximum magnitude of the natural frequencies is presented as a function of the op. amp. GB. Structures to realized biqads with two op. amps. and a predistortion technique, to take into account the amplifier's high frequency pole, are proposed. Experimental results are presented which confirm the theor

ISSN:0098-9886    

DOI:10.1002/cta.4490110104

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

年代:1983

数据来源: WILEY

摘要:

AbstractA generalized sufficient condition for the existence of a (unique) simple solution curve defined byfi(x1,x2,…,xn) = 0 fori= 1, 2. …n− 1 is developed. the condition is deduced based on a parametric representation of a solution curve. Modified networks having identical (n− 1) network equations are generated and topological criteria associated with the sufficient condition are obtained from the examination of modified n

ISSN:0098-9886    

DOI:10.1002/cta.4490110105

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

年代:1983

数据来源: WILEY

摘要:

AbstractA method is given for determining the loop equations of an ideal active switched capacitance (SC) network containing switches, capacitors and nullors. These equations are obtained directly by row‐column operations on the passive unswitched loop elastance matrix. the results are extended for theP‐ phase case. It is shown that the loop charges can be solved for and that the branch voltages can be obtained from the loop char

ISSN:0098-9886    

DOI:10.1002/cta.4490110106

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

年代:1983

数据来源: WILEY

摘要:

AbstractSome realizations of scaling elements in cascade connection with unit elements and gyro‐elements will be described. It will be shown that the voltage distribution inside the filter and the spread of capacitor values can be optimized in two steps using two independent parameters for each scaling element. the influence of these scaling elements is such that the very low sensitivity of the attenuation characteristic with respect to element variations is fully retained despite the fact that according to the usual definition the losslessness of the reference filter is not preserved. the SC circuits described in this paper are insensitive to ‘bottom plate’ parasitic capacitances. Top plate parasitics correspond largely to element variations in the reference filter so that also their influence is strongly reduced. A numerical example of a 14th‐order unit element bandpass filter i

ISSN:0098-9886    

DOI:10.1002/cta.4490110107

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

年代:1983

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490110108

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

年代:1983

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490110109

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

年代:1983

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490110110

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

年代:1983

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490110111

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

年代:1983

数据来源: WILEY