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Altera_Forum
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12 years ago

DC-DC converter in Power Supply

I have a query :D, acording to the theory, the dc-dc converter are noisy, and i've just checked reference design for FPGA of Altera and Xilinx, They use dc-dc converter, but how we can avoid the nois...
Altera_Forum's avatar
Altera_Forum
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12 years ago

Altera development kits are good examples of sufficient power supply filtering. Typically, switched mode DC/DC converters have input and output filters to avoid distribution of the switching noise. Bypass capacitors at all power supply pins, that are required by the FPGAs in any case further reduce supply ripple. Finally, sensitive PLL or transceiver analog power supply nets get additional filtering.