Dear all,

Im currently working on a PLL (phase lock loop) project and i would like to ask how do i measure the PLL pull in range using a simulator software called Cadence.

I would like to know :
1. What are my measure points (input output).
2. What are the measure procedures needed (something like a lab procedure).
3. What is the measured unit?( should it be in freq unit or just a range)

Thanks......

Your help is deeply appreciated.

 

Hello,

A lot of information on PLL's can be found in the links of this page from the EDUCYPEDIA.
http://www.educypedia.be/electronics/pll.htm

Take a special look at this PDF :
http://www.nxp.com/acrobat_download/applicationnotes/AN177.pdf

Greetings,
Bertus

 

I would personlly like to thank bertus for such a good reading material.

But i would like to ask regarding proper steps to actually measure pull-in range for a PLL. Hopefully theres a guide to it.

 

You may need to consult the data sheet for a specific PLL. No generalized answer may exist, although you may find there is some convergence of range for most PLL's.

 

This is currently a new measurement given by my supervisor.

To simulate AC response on loop filter for PLL using
a. input AC current.
b. output AC voltage.

Does this mean i have to obtained the phase and gain using both of this inputs?

I find this weird coz from my previous experience .......gain = Vout/Vin but using input AC current?