Title Modular teaching and learning offers for contemporary and needed further education
Project Number D/04/B/F/PP-146 157
Product CAD of Electronic Elements and Systems - PCB design and layout for EMC
Title CAD of Electronic Elements and Systems - PCB design and layout for EMC
Product Type modules
Term Electro magnetic compatibility (EMC) stands for new scientific and technical discipline that examines conditions for compatibility of operation of individual systems and ways that lead to its optimization. EMC and reliability are inseparable requirements of system that should operate correctly all the time and in any conditions. It is necessary to pay attention to EMC in design of printed circuit board (PCB) and to observe certain principles and procedures for its accomplishment. It is more suitable than to make additional amendments on already made product (components adding, shadow boxes) what also sometimes can be impossible.
Target group Workers in SME, trainers from various area of industry, high school teachers
Electric equipments and also their printed circuits have to be resistant against interruptions and, at the same time, they can not radiate interruption over the allowed level. Each electrical circuit can be considered as a source of interruption, through which electricity flows or is a source of electricity. Such circuit then more or less radiates interrupting energy that can interrupt the circuit itself and surrounded electric equipment. It is not possible to separate design rules for radiation suppression and high resistance. Usually applies that electric equipment that does not “radiate” is, at the same time, resistant against interruption. Printed circuit design, from viewpoint of radiation and resistance, is necessary to understand as complex activity that starts with block design of electric scheme of each apparatus.
Among basic rules in printed circuit design, from viewpoint of electro magnetic compatibility, accounts mainly:
•Minimization of current figures in electric circuit – it can be achieved by selection of suitable types of circuits, choice of circuits in accordance to their initial impendency.
•Minimization of current loops, or length of connections – current loops can be minimized by suitable arrangement of components, by suitable location of planar conductors, earthing, by correct configuration of feeder source (feeder distribution to PCB), by correct blocking of feeder by blocking condensers, etc.
•Minimization of frequency spectrum – do not to use pointlessly speedy circuits (inclination and final edges), pointlessly speedy data communication, etc.
•Filtration and protection of feeding and input / outlet clamps – protection against ESD (Electrostatic Discharge) and transition phenomenon solution, reduction of radiation to electric line
•Diffuser – radiation suppression and, at the same time, increase of resistance.
Area of application
secondary school, bachelor and master degree
CD, WEB site, word, Power point
on line, of line, E learning