Forum Discussion
Altera_Forum
Honored Contributor
Honored Contributorundesired sidebands on Cyclone IV E PLL output
I am using a PLL in a Cyclone IV E. I have a 20 MHz oscillator connected to a clock-input pin. I am trying to get 200 MHz as the output. For the design, I am using only an ALTPLL megafunction bloc...
Altera_ForumHonored Contributor
Honored ContributorNevermind, problem solved. The issue was due to a faulty VCCA regulator that had 22 KHz oscillations on its output.
Lesson learned: a sloppy VCCA equals sloppy PLL outputs.
