A Quick Guide To EMC Engineering文档.pdf

FEATURE A Quick Guide To EMC Engineering A compendium of basic design concepts that can help make a non-compliant device compliant hy is it people walk into a testing laboratory with all the confidence in the world that their Patrick Andre, Andre Consulting, Inc. W equipment is going to pass, only to have all their hopes and dreams dashed upon the rocks? Now, they are under a number of pressures: (1) Someone Differential mode tends to be a low frequency already told the board manufacturer to start making problem, while common mode is high frequency. For production quantities of circuit boards; (2) the budget example, a switching power supply fundamental will allow for $0.13 more components and, beyond switching frequency plus the first dozen or so that, the budget is shot; (3) shipping starts the middle harmonics will be mainly differential mode noise. of next week; and (4) the test lab, the one they are th Noise above the 20 harmonic is usually mostly standing in the center of while all this