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Is 50% duty cycle important for PLL design?

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vijaykarnam

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Hi all,

I am designing a pll. in that, as u all know, in feedback loop divide by N counter is required. For that 50% duty cycle is important or not? and why?

thanks
Vijay:D
 

wwwww12345

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Re: Regarding Pll

I think it is not important, for PFD only compares the phase of the input ,so the duty cycle is not of concern.
 

dinesh agarwal

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Regarding Pll

the comparision is on the basis of leading edges of the reference fre and the feedbach(Div ) fre

hence duty cycle readlly does not matter

the slope or the transient time is important instead of duty cycle

hope got it
 

khouly

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Regarding Pll

yeah the PFD is sensitive to the phase of the inputs

khouly
 

rajanarender_suram

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Regarding Pll

Pfd compares wrt to the rising edges of the inputs so the duty cycle is not important
 

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