<div dir="ltr">Hello,<div><br></div><div> I am sorry for the delay in replying because of certain work. Actually I am very new to Xcos and Scilab. But as a part project I want to build up some palette of my own which I would be able to use for the mathematical modelling of PLL. If possible help me to build up my own blocks(that is as per my specs).</div><div><br></div><div>Regards,</div><div>Partha</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jun 18, 2015 at 9:50 PM, Tim Wescott <span dir="ltr"><<a href="mailto:tim@wescottdesign.com" target="_blank">tim@wescottdesign.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Thu, 2015-06-18 at 00:15 -0700, Parthageet wrote:<br>
> Dear All,<br>
><br>
> I am doing a project and I am supposed to do the mathematical modelling for<br>
> a Phase Locked Loop. Can anyone please help me in this regard? Actually, I<br>
> am unable to figure out how to device a mathematical model for PLL using<br>
> XCOS in Scilab.<br>
<br>
</span>Are you having trouble with the mathematical modeling part, or the XCos<br>
part?<br>
<br>
The biggest issue that I find in modeling phase-locked loops is first in<br>
deciding what sort of model I want (i.e., do you want a full-on<br>
continuous-time circuit model, a fully linearized model of the loop in<br>
lock, or something in between), and then, if I'm modeling something more<br>
abstract (e.g. a fully linearized model), how I want to represent<br>
everything (this is particularly challenging if the fully linearized<br>
model is in sampled time, and uses something non-traditional for the<br>
phase detect, "NCO", or both).<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
<br>
Tim Wescott<br>
<a href="http://www.wescottdesign.com" rel="noreferrer" target="_blank">www.wescottdesign.com</a><br>
Control & Communications systems, circuit & software design.<br>
Phone: 503.631.7815<br>
Cell: 503.349.8432<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
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