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PLL Curves Ploting using Cadence+spectre

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mouzid

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PLL Curves Ploting

Hi members and Experts,

Can someone tell me how to plot the Gain and phase curves in a Bode plan using Cadence+spectre ?

Thanks in advance.
 

Re: PLL Curves Ploting

I don't think that you can directly plot phase and amplitude response of the PLL. This is due to the special nature of the PLL as the signal changes its domain from one point to another. For example, the signal after the loop filter is voltage but after the VCO it's freq/phase.
 

PLL Curves Ploting

Yes, to obtain gain and phase, you need to build behavior model with Matlab.
 

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