Journal:Informatica
Volume 15, Issue 1 (2004), pp. 77–92
Abstract
The mathematical model and methods of calculation of the layout structure of comparator signal circuits with distributed parameters are presented. The algorithm of computer formulation and solving of equations of transfer functions of comparator circuits is provided. Theoretical substantiation of optimizing the micro‐layout of large‐scale integration circuits of parallel subnanosecond analog‐to‐digital converters (ADC) is proposed.
The signal modeling and investigation of transitional processes in comparator circuits of the subnanosecond range 6‐, 8‐bit ADC of different layouts are presented. It has been determined that the transitional process quality in inputs of comparator blocks strongly depends on the signal circuit layout architecture, the compatibility of wave resistances of signal microstrip lines and on the number of branches to comparator bloks.The designed layouts of the 6‐bit subnanosecond range ADC comparator circuit with different layout structures are presented. Modeling of equivalent circuits of the designed layouts was performed and the modeling results are presented.The architecture of topology for comparators circuits presented here allows the developing of gigahertz 6‐ and 8‐bit analog‐to‐digital information converter.
Journal:Informatica
Volume 13, Issue 4 (2002), pp. 393–404
Abstract
The paper analyzes the performance of parallel global optimization algorithm, which is used to optimize grillage-type foundations. The parallel algorithm is obtained by using the automatic parallelization tool. We describe briefly the layer structure of the Master–Slave Template library and present a detailed mathematical formulation of the application problem. Experiments are done on the homogeneous computer cluster of 7 IBM machines RS6000. The results of experiments are presented.
Journal:Informatica
Volume 13, Issue 2 (2002), pp. 149–162
Abstract
A tool for modeling the propagation of optical beams is proposed and investigated. Truncated Laguerre–Gauss polynomial series are used for approximation of the field at any point in free space. Aposteriori error estimates in various norms are calculated using errors for input functions. The accumulation of truncation errors during space transition is investigated theoretically. The convergence rate of truncated LG series is obtained numerically for super-Gaussian beams. An optimization of algorithm realization costs is done by choosing parameters in such a way that the error reaches minimum value. Results of numerical experiments are presented.