Hello,
I have been computing noise figure of a low noise amplifier by running s-parameter simulation. In this I mimic the DC operating point of my circuit by means of supplying external voltage sources to bias the device.
In my actual design, I have a LDO and a chargepump that has a variable oscillator frequency and hence lots of frequency content in it. I would like to now simulate my actual die where in the LDO and Chargepump are biasing the LNA so that I can access the contribution of the LDO, Chargepump, other analog blocks on the NF of the LNA if any.
What is the best way to do this ? Ideally if there is a "transient assisted spara" simualtion engine, then I could run transient on the design and then use the result as the operating conditions for spara and thereby compute the small signal parameters as well as NF.
I looked around and I couldn't find such a simulator within Cadence or ADS.
Is there any other simulator I could use ? I tried using Harmonic Balance with an initial transient, but I couldn't compute the NF using this engine.
The pass band of the LNA is between 1.5-2.5GHz and the Charge pump has a variable frequency between 5-10MHz.
Please let me know if I am missing something. Any help would be greatly appreciated.
Thank you