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Honored Contributor
Honored ContributorIsolation filter for VCCA in Cyclone-IV E
Dear Sir, I want to know the type of isolation filter circuit for connecting 2.5V to VCCA(Analog power to PLL) in Cyclone IV FPGA. I am referring Figure 2. Example Cyclone IV E power supplies...
Altera_ForumHonored Contributor
Honored ContributorHigher impedance ferrite beads (e.g. 300 to 600 ohm) in combination with the VCCA bypass capacitors are usually fine.
