Forum Discussion

hv2220's avatar
hv2220
Icon for New Contributor rankNew Contributor
4 years ago

1GHz clocks with 33% duty cycle

I'm looking for an FPGA that can generate high frequency clock signals(1GHz or more) with 33% duty cycle. I tried using Cyclone V SOC for this using PLLs but at 1GHz, 33% duty cycle is not possible. ...
EngWei_O_Intel's avatar
EngWei_O_Intel
Icon for Frequent Contributor rankFrequent Contributor
4 years ago

Hi there

Looking at the PLL spec of Cyclone V, it doesn't seem to support up to 1GHz output freq.

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-v/cv_51002.pdf

Cyclone V does support programmable duty cycle. We have to do some configuration on the counter value to achieve that. There is explanation regarding the setup:

https://community.intel.com/t5/Intel-Quartus-Prime-Software/PLL-Duty-Cycle-Issue/td-p/244654

  • hv2220's avatar
    hv2220
    Icon for New Contributor rankNew Contributor
    4 years ago

    If the cyclone V does not support 1GHz output freq, is there any other FPGA kit that can support >1GHz output frequencies at 33% duty cycle?