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Design of a PCB analog module
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    Tutorials (3)
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     Design aspects for digital PCB modules
     Effectiveness of the PWR-GND planes decoupling capacitor
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Effectiveness of the PWR-GND planes decoupling capacitor tutorial

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1. Effectiveness of the PWR-GND planes decoupling capacitor

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Table 1 shows the value of the PCB inductance for the three configurations seen above. The PWR and GND plane configuration gives the best result and a quite big decoupling capacitor.

 

 

PWR track &

GND track

PWR track &

GND plane

PWR plane &

GND plane

L (nH)

115 + 115 = 230

51 + 0.8 = 51.8

0.025 + 0.025 = 0.05

C(pF)

5

20

271

Tab. 1 Comparison of PCB inductances (wt= 1mm, w= 10cm, l= 10cm, h=1.6mm)

1. Effectiveness of the PWR-GND planes decoupling capacitor

pages: previous | 1 2 [3]

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