发射电磁干扰(EMI)与传导电磁干扰(EMI)|Radiated EMI and conducted EMI

pwm

Radiated Radiated EMI is most often measured in the frequency range from 30 MHz to 10 GHz (according to the FCC).
Emission Sources: Clocks, clock lines, data lines; switching power supplies,	Susceptibility: Clock lines & data lines poorly laid out, improperly terminated;
Solutions: Balanced transmission lines, proper terminations, ground planes, shielding, limited rise & fall time drivers	Solutions: Shielding, layout, filtering, ground planes, differential line receivers,
Conducted Conducted EMI is most often measured in the frequency range of several kHz to 30 MHz (according to the FCC).
Emission Sources: Power supplies (switching), power rails, motors, relays,	Susceptibility: A.C. power cord poorly filtered, power rails poorly decoupled,
Solutions: Good bypassing & decoupling practices, layout, ground planes, shielding,	Solutions: Good bypassing & decoupling practices, layout, ground planes, shielding, power line filtering,

andrew-jiang

solution 太泛泛了

shuangcong

不是一个具体问题，只是做一般的讨论的时候，solution也只能做到这样泛泛而谈了。