pll simulation ads

I use ADS to simulate the PLL phase noise response(sample of design guide). The synthesizer IC is ADF4111 which phase noise floor is -215 dBc/Hz.

I don't know what number to asign to the variables pointing out in the schemetic ,as attached. And I can't get those data from ADI co. .

help....Thanks~

Can any body help me ~~~~

N0, L0, F1, L1, F2 and L2 are phase noise parameters for the reference oscillator divider and VCO divider that you are using. In the jpg you attached, the reference oscillator divider is 50, so that scales the reference oscillator phase noise contribution.

The VCO divide ratio is 4500, which scales the phase noise contribution of the VCO.

You are unlikely to get that sort of information out of ADI. Set them to -200 to eliminate them, and assume there will be a small error in your simulation.

Id is the charge pump current. You should be able to get that from the ADI datasheet.

Regards

Dave
www.keystoneradio.com

just leave it default

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