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ADE Assembler export to Matlab issues

schuifpui

dear forum members,

I would appreciate it if anyone could help me with the following problem. I am trying to export s-parameters, noise-parameters and some DC values from an amplifier design as function of a bias current sweep.. I managed to setup ADE Explorer/Assembler with the appropriate outputs and now can access the s-parameters per bias point, see script below.

Unfortunately, I only can do  a single-frequency s-parameter measurement, which is annoying, but I could live with that:

import cadence.srrdata.*
import cadence.Query.*
adeInfo.loadResult('DataPoint',1)                   ; for starters, could add other datapoints in a loop
cadence.srrdata.aaSP(1,1,'result','sp-sp').x  ; gives the bias current scalars
cadence.srrdata.aaSP(1,1,'result','sp-sp').y  ; gives the complex numbers for s11, as function of bias current

More importantly, I so far have not been able to retrieve the noise scalars (NFmin, Gmin, Rn). The documentation I've seen focuses (RAK, User Guides) on transient measurements. Also, a  cadence.srrdata.NG data access function is mentioned in the Matlab help file, that is supposed to give a "noise gain waveform", whatever that is, but cannot get anything out of that either. I've been struggling with this for the past two weeks and reached a dead end. Please help!

I am using Spectre 18.10.077, IC 6.1.7.722 and Matlab R2018b.

  • Curtisma

    The aaSP function in MATLAB isn't working for me at all.

    I open Matlab and load my results successfully, but when I try to get some data using the aaSP function it throws an error every time as shown below.  Using the aaSP in the Cadence calculator and as part of an expression in Maestro works great.

    Any idea where I am going wrong?  I have tried specifying the datapoint # and test name when running the loadResult() method but it still throws an error.  I also tried specifying the result name ('sp-sp') and result directory as part of my call to aaSP but those also throw an error.

    The transient data access functions (VT) do work for another sim I'm running.  I haven't been able to find a way to evaluate an expression and return a Waveform to MATLAB.  Is this possible?

    I am using MATLAB R2019a and Virtuoso IC6.1.7-64b.500.23

    -Curtis

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