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Altera_Forum
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16 years ago

PLL usage

Hello all, I've noticed that many use PLL on the reference clock input even if they do not need to divide/multiply/shift this clock or do not have external clock to synchronize to the reference fr...
Altera_Forum's avatar
Altera_Forum
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16 years ago

Also note that Altera (along with many other chip vendors) shows all kinds of ferite beads, capacitors and other funky power supply "filters" for the PLL supply pins in app notes and user guides. But... never really specify any special requirements for these supply pins :-)

What kind of engineering is that?