Define and plot functions in Cadence

[penghan]

How to Define and plot functions in Cadence?
With generated netlist or Analog Artist?
Or other way?

Thanks a lot.

 

[Hughes]

Wave expressions can be constructed with Calculator tool in Analog Artist.

 

[penghan]

Hughes,thank you.
In fact,i hope to get a two-port network's Noise Figure(NF).
One way is by simulating and i did it.
At the same time,i caculate NF and get a function varies by frequency.
Then,how to define the function in Cadence,plot it and the simulation results in one window.

 

[Hughes]

Hi penghan,

Sorry, I still don't catch your problem.
You have posted a figure in How to measure NF of LA? Need Help again.:


So, what's the problem?

 

[penghan]

yes,the picture i posted is the simulation result.

After simulation,i caculate the network's NF by handwork,and get a function.

Then how to plot the result(function caculated by handwork),so as to compare with simulation results.

 

[Hughes]

So you want to plot a function such as NF=N(f), right?

I don't find a way to directly plot a function. But if the function can be realized by a filter, a schematic can be constructed to simulate the function.

Using pwl source and transient and also plot the curve shape of the function, but the horizontal axis will be of voltage or time.

Another possible way is to write a veriloga model to simulate the function, but I'm not very sure whether it is realizable because I never did that.