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How to setup SepctreRF condition for whole PLL (Read 3236 times)
Wendy
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How to setup SepctreRF condition for whole PLL
Sep 17
th
, 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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Posts: 75
Fantasyland
Re: How to setup SepctreRF condition for whole PLL
Reply #1 -
Sep 17
th
, 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 17
th
, 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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