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How to setup SepctreRF condition for whole PLL (Read 3149 times)
Wendy
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How to setup SepctreRF condition for whole PLL
Sep 17th, 2004, 12:40am
 
All,

Can someone show me  how to setup the SpectreRF simulation condition for a whole PLL to get the close loop phase noise? Is it simular as oscillator except deselecting the oscillator tap?

Thanks,
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Mighty Mouse
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Fantasyland
Re: How to setup SepctreRF condition for whole PLL
Reply #1 - Sep 17th, 2004, 8:39am
 
Check out section 1.2 (Direct Simulation) of http://www.designers-guide.com/Analysis/PLLnoise.pdf.

You would not treat a PLL as a oscillator as there is a periodic input signal. Instead you treat it as a driven circuit.

- MM -
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Wendy
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Re: How to setup SepctreRF condition for whole PLL
Reply #2 - Sep 17th, 2004, 8:26pm
 
Hi, MM,

I read the paper, actually I already know that the setup for the close loop should be different from that for VCO. But what's the setup anyway? Would it be possible to let us know.

Thanks.
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