"92"^^ . . . "Podstatou projektu je\u00A0z\u00E1kladn\u00ED v\u00FDzkum\u00A0nov\u00FDch metod modelov\u00E1n\u00ED a po\u010D\u00EDta\u010Dov\u00E9 simulace elektronick\u00FDch obvod\u016F, jejich\u017E chov\u00E1n\u00ED\u00A0 je obt\u00ED\u017En\u00E9 a v n\u011Bkter\u00FDch p\u0159\u00EDpadech principi\u00E1ln\u011B nemo\u017En\u00E9 simulovat v programech typu SPICE. Jedn\u00E1 se zejm\u00E9na o tzv. obvody s extern\u00EDm sp\u00EDn\u00E1n\u00EDm, kter\u00E9 obsahuj\u00ED analogov\u00E9 sp\u00EDna\u010De, \u0159\u00EDzen\u00E9 vn\u011Bj\u0161\u00EDmi sign\u00E1ly. Typick\u00FDmi reprezentanty t\u011Bchto obvod\u016F jsou filtry se sp\u00EDnan\u00FDmi kapacitory nebo sp\u00EDnan\u00E9 DC-DC m\u011Bni\u010De. Klasick\u00E1 p\u0159echodov\u00E1 anal\u00FDza (TRANSIENT) je m\u00E1lo \u00FA\u010Dinn\u00E1, \u010Dasov\u011B neekonomick\u00E1a zat\u00ED\u017Een\u00E1 \u010Dasto neakceptovateln\u00FDmi numerick\u00FDmi chybami. Pr\u016Fm\u011Brovac\u00ED techniky jsou sice \u010Dasov\u011B \u00FAsporn\u00E9, ale ve v\u00FDsledc\u00EDch jsou sp\u00EDnac\u00ED efekty vyhlazeny. AC anal\u00FDza je mo\u017En\u00E1 jen nad pr\u016Fm\u011Brovan\u00FDmi modely, kter\u00E9 jsou v\u0161ak nepou\u017Eiteln\u00E9 nap\u0159. pro obvody se sp\u00EDnan\u00FDmi kapacitory. Pro tyto obvody zat\u00EDm neexistuj\u00ED metody p\u0159\u00EDm\u00E9 anal\u00FDzy v SPICE. Vy\u0159e\u0161en\u00ED t\u011Bchto aktu\u00E1ln\u00EDch probl\u00E9m\u016F po\u010D\u00EDta\u010Dov\u00E9ho modelov\u00E1n\u00ED a simulace sp\u00EDnan\u00FDch obvod\u016F si vy\u017E\u00E1d\u00E1 revizi a zobecn\u011Bn\u00ED dosavadn\u00EDch teoretick\u00FDch pil\u00ED\u0159\u016F anal\u00FDzy obvod\u016F v" . "The substance of this project\u00A0is a basic research of new methods of modeling and computer simulation of electronic circuits, whose behavior can be simulated in SPICE-family programs with difficulty or, in some cases, not at all.\u00A0\u00A0The so-called circuits with external switching, composed of\u00A0 analog switches, controlled by external signals, belong to this group of problematic networks.\u00A0Typical representatives are switched capacitor filters or switched DC-DC converters. The well-known transient analysis is\u00A0ineffective, time consuming, and generates unacceptable numerical errors in some cases. The averaging techniques are very economical, but they remove the\u00A0switching effects from the analysis results.\u00A0The AC analysis is practicable only for averaged models. However, they cannot be used for the switched capacitor circuits. No direct methods of AC analysis in SPICE exist for these circuits today. Resolving the above topical problems of computer modeling and simulation of switched circuits will"@en . . "Speci\u00E1ln\u00ED metody modelov\u00E1n\u00ED a simulace sp\u00EDnan\u00FDch obvod\u016F" . . "http://www.isvav.cz/projectDetail.do?rowId=GA102/08/0784"^^ . . . "2015-02-09+01:00"^^ . . "2010-04-16+02:00"^^ . "V\u00FDsledkem \u0159e\u0161en\u00ED projektu bylo napln\u011Bn\u00ED v\u0161ech c\u00EDl\u016F zejm\u00E9na v t\u011Bchto kl\u00ED\u010Dov\u00FDch bodech: Metody AC anal\u00FDzy obvod\u016F se sp\u00EDnan\u00FDmi kapacitory na b\u00E1zi jak idealizovan\u00FDch model\u016F, tak i s uva\u017Eov\u00E1n\u00EDm libovoln\u00FDch obvodov\u00FDch prvk\u016F, kter\u00E9 nyn\u00ED nov\u011B umo\u017E\u0148uj\u00ED tuto anal\u00FDzu na platform\u011B celosv\u011Btov\u011B roz\u0161\u00ED\u0159en\u00FDch SPICE kompatibiln\u00EDch program\u016F. Zobecn\u011Bn\u00ED pr\u016Fm\u011Brovan\u00E9ho modelu PWM (Pulse Width Modulation) sp\u00EDn"@cs . "0"^^ . . . "switched circuit" . "1"^^ . . . "1"^^ . "GA102/08/0784" . . " model" . . "2008-01-01+01:00"^^ . " switched capacitor" . "As a result of the project solution, all the project aims were fulfilled, particularly in the following key points: Methods of AC analysis of switched-capacitor circuits on the basis of both the idealized models and also with arbitrary circuit elements. Currently, these methods enable the AC analysis on the platform of the worldwide used SPICE compatible programs. A generalization of averaged mod"@en . . . "2010-12-31+01:00"^^ . . "Special methods of modeling and simulation of switched circuits"@en . . . "92"^^ . "switched circuit; switched capacitor; model; analysis"@en .