Problem with simulating PLL in FF condition

[jcpu]

Re: A problem in PLL

Dear Semito:

Have a question here:
Initial converging trajector of V-vontrol here is
very different from my experieces.
It look far under-damped and when
exposed to some noise / interference injection
tend to give big response.

Good luck,

 

[semitao]

A problem in PLL

Hi, guys,
I have simulated my pll again, I find the spike disappear. I think maybe this is the CAD tool problem.

 

[RFDave]

Re: A problem in PLL

Are you sure about that, or is this wishful thinking? If you are doing a graduation project, then you will probably be OK, but if this is a real product, the noise is just hiding until you get ready to go into production

Dave
www.keystoneradio.com

 

[semitao]

A problem in PLL

Dave,
you are right, I think I should do more analysis to find the real reason.