Altera Device-Specific Power Delivery Network Manuel d'utilisateur Page 28

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1–24 Chapter 1: User Guide for the Device-Specific Power Delivery Network (PDN) Tool
Design PCB Decoupling Using the PDN Tool
Device-Specific Power Delivery Network (PDN) Tool User Guide September 2012 Altera Corporation
Figure 1–17 shows one of the capacitor combinations that you can select to meet your
design goal. Figure 1–18 is the enlarged view of the Z
EFF
plot. As shown in the plot,
Z
EFF
remains under Z
TARGET
up to F
EFFECTIVE
. There are many combinations, but the
ideal solution is to minimize the quantity and the type of capacitors needed to achieve
a flat impedance profile below Z
TARGET
.
Figure 1–17. Decap Selection Tab in a Power-Sharing Design
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