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Creating a complex waveform out of 2 real waveforms

Hello, I am using Cadence Virtuoso. I was wanting to see Yopt (or Zopt) on a smith chart. I am doing an s-parameter simulation where it gives me Gopt and Bopt., where Yopt= Gopt+ j * Bopt. I was attempting to plot it using the calculator with:

getData("/Gopt" ?result "sp_noise")+(j*getData("/Bopt" ?result "sp_noise"))

but that gave me an error. I tried using complex as well and that gave me an error so I was wondering if there was a way to do it?

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ShawnLogan over 2 years ago

Dear mars32,

mars32 said:
I was attempting to plot it using the calculator with:

getData("/Gopt" ?result "sp_noise")+(j*getData("/Bopt" ?result "sp_noise"))

but that gave me an error. I tried using complex as well and that gave me an error so I was wondering if there was a way to do it?

There is an ocean function gmin() that I think may provide some help. The syntax is as follows:

gmin( o_Gopt o_Bopt f_zref)

where:
Gopt is the optimum source conductance
Bopt is the optimum source susceptance
f_zref is the reference impedance

and it returns:

yOpt = o_Gopt + (complex 0 1) * o_Bopt
return ( 1 / f_zref(1) - yOpt ) / ( 1 / f_zref(1) + yOpt )

Hence, in your case:

Gopt = getData("Gopt")
Bopt = getData("Bopt")

Zref = zref(1 ?result "sp")

plot(gmin(Gopt Bopt Zref))

The full function reference is at URL:

https://support.cadence.com/apex/techpubDocViewerPage?xmlName=oceanref.xml&title=OCEAN%20Reference%20--%20Predefined%20and%20Waveform%20(Calculator)%20Functions%20-%20gmin&hash=pgfId-1030337&c_version=ICADVM20.1&path=oceanref/oceanrefICADVM20.1/chap10.html#pgfId-1030337

Shawn
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ShawnLogan over 2 years ago

Dear mars32,

mars32 said:
I was attempting to plot it using the calculator with:

getData("/Gopt" ?result "sp_noise")+(j*getData("/Bopt" ?result "sp_noise"))

but that gave me an error. I tried using complex as well and that gave me an error so I was wondering if there was a way to do it?

There is an ocean function gmin() that I think may provide some help. The syntax is as follows:

gmin( o_Gopt o_Bopt f_zref)

where:
Gopt is the optimum source conductance
Bopt is the optimum source susceptance
f_zref is the reference impedance

and it returns:

yOpt = o_Gopt + (complex 0 1) * o_Bopt
return ( 1 / f_zref(1) - yOpt ) / ( 1 / f_zref(1) + yOpt )

Hence, in your case:

Gopt = getData("Gopt")
Bopt = getData("Bopt")

Zref = zref(1 ?result "sp")

plot(gmin(Gopt Bopt Zref))

The full function reference is at URL:

https://support.cadence.com/apex/techpubDocViewerPage?xmlName=oceanref.xml&title=OCEAN%20Reference%20--%20Predefined%20and%20Waveform%20(Calculator)%20Functions%20-%20gmin&hash=pgfId-1030337&c_version=ICADVM20.1&path=oceanref/oceanrefICADVM20.1/chap10.html#pgfId-1030337

Shawn
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