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jAlter's avatar
jAlter
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1 year ago

Schmitt Trigger at MAX10 PLL dedicated input

MAX 10 devices feature selectable Schmitt Trigger on all inputs. The question is if the dedicated PLL input pin is affected by the Schmitt Trigger when it is enabled, or if the PLL input bypasses the...
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AqidAyman_Altera's avatar
AqidAyman_Altera
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1 year ago

From the principle of Schmitt Trigger, you could see it mainly filter the glitch of input signal.


The PLL performance depends on the jitter of input clock mainly, so I don’t think the Schmitt trigger could optimize the PLL performance.


jAlter's avatar
jAlter
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1 year ago

Hi Aqid,

I think you misunderstood me. I didn't say, or at least I didn't mean, that the Schmitt Trigger would improve the PLL performance. Not in that sense. But never mind. I think we are not going anywhere with this discussion and probably better just to close the topic.

Thanks,