摘要:

AbstractA new class of non‐canonic, driving‐point immittance realizations of passive, common‐ground, transformerless, two‐element‐kindRLCnetworks with minimum number of nodes is presented. Six new algorithms of realization are developed by application of canonic, orthogonal matrix transformations with reduced number of degrees of freedom. the number of appliedRLCelements of one kind can be minimized and of the other kind reduced, while their parameter values are calculated directly in a l

ISSN:0098-9886    

DOI:10.1002/cta.4490220302

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

年代:1994

数据来源: WILEY

摘要:

AbstractNegative‐conductance oscillators are termed adiabatic when their transient operation signal can be represented as a narrowband‐modulated Fourier series with a finite number only of dominant components, including the DC one. the method presented here allows one to perform the complete analysis of such oscillators in a rigorous shortened manner. Indeed, it merges the approach of the describing function technique into the classical frame of perturbation theory, so as to replace the oscillator model in the instantaneous variables with a simplified one in the dominant variables, i.e. the complex envelopes of the dominant components. More precisely, the starting model comprises the input impedance and the open‐circuit voltage of the Thévenin equivalent one‐port of the linear network in the complex frequency domain and the voltage/current characteristic of the non‐linear resistor in the time domain. the final model instead comprises as many such triads as there are dominant components. Each triad is made up of an input impedance and an open‐circuit voltage in the baseband complex frequency domain and a voltage/current describing characteristic in the slow time domain. Standard circuit analysis tools are then used to obtain the equations of the dominant dynamics, steady state and dynamical stability of the oscillator.To facilitate reading the paper, as soon as a new formula is proposed or derived, the result of its application to the well‐known van der Pol oscillator is also provided. In the end, to highlight the simplicity and efficiency of the method, a much more complex case (an eighth‐order oscillator with three dominant components) is an

ISSN:0098-9886    

DOI:10.1002/cta.4490220303

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

年代:1994

数据来源: WILEY

摘要:

AbstractThe ‘neural’ A/D converter of Tank and Hopfield is analysed from the viewpoint of circuit theory. It is shown to be a particular case of the canonical non‐linear programming circuit of Chua and Lin. Several qualitative properties concerning the DC solutions are proved. A piecewise‐linear analysis of trajectories in the state space is carried out on the basis of the eigenvalues and eigenvectors of the corresponding dynamical matrix. It is shown that the eigenvalues are related to the driving point impedance of anRCone‐port network. Asymptotic expressions of the eigenvalues are derived for largeN, Nbeing the number of bits. It is shown that the dynamic behaviour represents a sort of successive‐approximation A/D conversion. However the conversion time does not increase appreciably as the number of bits increases. the cases of incorrect behaviour and the amount of the maximum conversion error are derived forN>5. Simulation results are presen

ISSN:0098-9886    

DOI:10.1002/cta.4490220304

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

年代:1994

数据来源: WILEY

摘要:

AbstractA simple switched capacitor (SC) circuit is given which realizes a one‐dimensional discrete dynamical systemXn+1 =Xn+uxzgenerating intermittent chaos with a 1/f‐shaped power spectrum. an integrated circuit with a pair of logarithmic and antilogarithmic amplifiters can easily realize the power‐law term xzwhich plays a key role in generating l/fnoise. an inevitable small offset voltage ϵ in the SC circuit governs the cut‐off frequency of 1/fnoise, and when the dynamical system is modified by introducing an effective ϵ, the ‘indirect method’ enables us to get the precise power spectrum in the mo

ISSN:0098-9886    

DOI:10.1002/cta.4490220305

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.4490220306

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.4490220307

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.4490220301

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

年代:1994

数据来源: WILEY