ISSN:0098-9886    

DOI:10.1002/cta.4490220103

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

年代:1994

数据来源: WILEY

摘要:

AbstractA simple method is described for the design of fixed‐point recursive digital filters with low round‐off noise. the method is based on reducing to zero as many as possible of the coefficients of the filter state matrices. an optimization procedure is used to get the optimum value of linear transformation that minimizes the total output round‐off noise power. Compared with the existing approaches, this method is characterized by its computational simplicity, very low output round‐off noise (if not the lowest possible) and low coefficient sensitivity. the structure of the proposed technique is modular, which makes it suitable for VLSI implementation. the technique is then employed to obtain a reduced‐order low‐round‐off‐noise filter with characteristics equivalent to some desired FIR specifications. Illustrative examples are given to verify t

ISSN:0098-9886    

DOI:10.1002/cta.4490220104

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

年代:1994

数据来源: WILEY

摘要:

AbstractA complete description of switched capacitor networks which include an arbitrary number of non‐uniform input and output phases is presented on the basis of the generalized phase transfer matrix by extending a previously introduced state space approach. the input frequency harmonic (main harmonic) of the periodically time‐varying system transfer function is obtained and the effect of periodic fluctuation of the switching instants on the transfer characteristics of the switched capacitor filters is analysed. This procedure also facilitates the evaluation of the effects of non‐uniform multiphase switching. Application of the results to a switched capacitor filter shows that the frequency response is very sensitive to the fluctuation of switching ins

ISSN:0098-9886    

DOI:10.1002/cta.4490220105

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

年代:1994

数据来源: WILEY

摘要:

AbstractWe propose in this paper an efficient design of FIR digital differentiators of degreek, k= 1, 2, 3,…, and their implementation in a novel structure which allows the order to be varied without having to alter the weights used in it. More precisely, we show that by using these ‘universal weights’ in a structure of orderNmax, the order can be varied fromN= 3 toNmaxwhile keeping the weights fixed and retaining the optimality of performance. Mathematical formulae have been derived for these ‘universal weights’ for differentiators performing in the low‐ or midband‐fre

ISSN:0098-9886    

DOI:10.1002/cta.4490220106

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

年代:1994

数据来源: WILEY

摘要:

AbstractThis paper describes a method of determining the forced periodic steady state response of non‐linear circuits. the method is closely related to the work of Aprille and TrickProc. IEEE,60, 108‐114 (1972) and also to the finite difference method for solving a boundary value problem.The new approach is a shooting method in the sense that in every iteration an initial value problem is solved. It is, however, also a relaxation method, because in every iteration a periodic wave‐form is obtained. This is achieved by solving in each step a linear time‐dependent differential equation whose solution can be easily transformed into a periodic solution satisfying this linear equation. Because the iteration takes place on wave‐forms rather than initial values and every solution satisfies the boundary conditions, the method is robust. It will be shown that for a causal approximation of the time derivatives the iterated wave‐forms are equal to those found using the finite differe

ISSN:0098-9886    

DOI:10.1002/cta.4490220107

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

年代:1994

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490220108

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

年代:1994

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490220109

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

年代:1994

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490220102

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

年代:1994

数据来源: WILEY