Applying calculator function to multiple signals at once

Dear SteveVrk,

Did you consider using the ocean command max() to provide the maximum values of your waveform expressions using the slewRate(0 or peakToPeak functions? Figure 1 from the Ocean reference manual shows the syntax. So, in your example if you define your waveforms as va, vb, vc_1, and vc_2:

max(peakToPeak(va) (peakToPeak(vb) (peakToPeak(vc_1) (peakToPeak(vc_2))

will provide the maximum value of the peak-to-peak waveforms.

You can use this as an ocean script and add it to your outputs or make an expression with it in the calculator to import directly into Assembler/Explorer. In Figure 2, I used max() in the calculator and printed the values of the peak-to-peak of two waveforms individually and the result of using the max() function on the two peak-to-peak values in the table below the calculator expression.

Shawn

Figure 1

from URL: support.cadence.com/.../techpubDocViewerPage

Figure 2

Hi Shawn,

That's a good point, thanks!

For me, the list of signals is in the tens. With peakToPeak this still works well.

With slewRate things get unpractical since I have to repeat the function call with arguments tens of times.

With even more complicated functions, all bets are off.

Hence I was hoping for a function which could first transform it into a vector and then I could apply arbitrary complex function to all of them in parallel.

I will use this approach meanwhile.

Steve,

You could use abGroup from How to create a group of signals in the calculator?. Then you could use:

ymax(peakToPeak(abGroup(VT("/VA" VT("/VB") VT("/VC<1>") VT("/VC<2>"))))

or ymax(SomeComplicatedFunction(abGroup(...) extraArgsForComplicatedFunction))

Unfortunately there's no elegant way to register abGroup with the calculator, so you probably just need to load the code from your .cdsinit and then gather the expressions in the calculator. One slightly messy way of doing it is to use the VT button, click on all the nodes in the schematic you want, repeatedly hit "+" in the calculator to get a sum of all those you want, and then add abGroup() around the whole expression and replace the + with space. Yes, it should be easier, but at the moment there isn't really an easy way other than typing it in... but at least the complicated function only needs to be wrapped around the entire group, rather than each individual signal.

Andrew