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Layout including parasitics for printed circuit boards
Author(s) -
Wawryn Krzysztof
Publication year - 1988
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.4490160202
Subject(s) - parasitic extraction , routing (electronic design automation) , parasitic capacitance , printed circuit board , equipotential , path (computing) , capacitance , inductance , interconnection , computer science , function (biology) , electronic engineering , amplifier , parasitic element , electronic circuit , electrical engineering , topology (electrical circuits) , engineering , physics , telecommunications , voltage , cmos , electrode , quantum mechanics , evolutionary biology , biology , programming language
An automatic layout system is developed for optimal simultaneous placement of elements and equipotential nodes and routing interconnection paths that can be applied to multilayer analogue printed circuit boards (PCBs) including parasitic couplings. the objective is to minimize the influence of parasitic capacitance and inductance couplings of printed paths on performance of analogue circuits as an electrical criterion. A force model has been used to determine optimal placement where the sensitivities of network function on parasitic capacitances and inductances are the sets of weighted coefficients between forces of attractions and repulsions. the routing algorithm is a combination of topographic simulation method with minimum length connection path. the topography of predicted parasitic couplings is formed before each connection path is routed where the sensitivities of the network function on parasitic capacitances and inductances create the heights of tops. Placement and routing algorithms have been developed, programmed and compared with conventional force algorithm and the Lee algorithm. Practical results of frequency characteristics of printed circuit boards of a wide‐band HF amplifier have been obtained and presented.