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高频旁路电容的选择TN-00-06 BYPASS CAPACITOR SELECTION
TECHNICAL NOTE
This article was originally published in 1996.
BYPASS CAPACITOR SELECTION FOR HIGHSPEED DESIGNS
and resistance (R1, Rg2, L2, Lg2 in Figure 1) so that transient currents flowing across the power bus do not cause excessive noise at the power and ground pins of the IC. Therefore, the bypass capacitor should have low effective series resistance (ESR) and series inductance while having a large enough capacitance value to supply current to the IC during switching. Several factors need to be considered when selecting local bypass capacitors. These factors include selecting the proper capacitor value, dielectric material, geometry and the location of the capacitor in relation to the IC. Careful observance of fundamental principles will determine
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