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Design Languages >> Verilog-AMS >> Obtaining the minimum value of an input port in noise analysis
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Message started by sunmus on Oct 16^th, 2015, 4:31am

Title: Obtaining the minimum value of an input port in noise analysis
Post by sunmus on Oct 16^th, 2015, 4:31am

Hi,
I am trying to write a phase noise model of an integer divider. The input and output ports are of type phase and is accessed using Theta. For example, Theta(out) <+ Theta(in)/ratio.

In the testbench setup for noise analysis, I am giving a flicker+white noise input to the divider. I want to get the white noise (floor) value at the divider's input port (in). how can I get this value and assign it to a real variable inside the divider module ??

I would appreciate if someone can help me asap.

Thanks,
Sunil

Title: Re: Obtaining the minimum value of an input port in noise analysis
Post by Ken Kundert on Oct 18^th, 2015, 9:27am

You cannot. During a small-signal analysis, the models are evaluated in advance and linearized. They are not active during the small-signal analysis itself.

-Ken

Title: Re: Obtaining the minimum value of an input port in noise analysis
Post by sunmus on Oct 19^th, 2015, 10:11am

Thanks Ken !
-Sunil