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How to save current through inherited connections in a cell with AMS

twen

I am able to use the Spectre save command like "save TOP.INST_A:inh_vdd" to save the current through the inherited connections in TOP.INST_A with the Spectre simulator. TOP.INST_A is an analog instance. However, I can not find a way to save the current through the same inherited connections in the same cell when I switch to the AMS simulator. Is there any way that I can save the current through the inherited connections in a cell with AMS?

This netlist is from the AMS user's guide and I can not find a clue how to save the current through the inherited connections.

comparator
(* integer library_binding = "amslib";
integer cds_net_set[0:1]= {"xground","vdd"};
integer xground[0:1] = {"new_ground","cds_globals.\\gnd5! "};
integer vdd = "cds_globals.\\3.3v! "; *)
I2 ( .inn( dacOut ), .inp( holdSig ), .out( compOut ) );
 
I do no see any inherited ports listed in the ncsim's design browser either.

getVersion

"@(#)$CDS: virtuoso version 6.1.6-64b 12/07/2015 20:18 (sjfbm186) $"
ncsim> version
TOOL:    ncsim(64)    15.20-s002


TJ

  • Andrew Beckett

    TJ,

    The Tcl probe command in ncsim (which you can access in Simvision) has a "-inhconn_signal" option which allows you to do this. Run <INCISIVEinstDir>/bin/cdnshelp and search for "inhconn_signal" and you'll find documentation on this.

    Regards,

    Andrew.

  • twen

    Hi, Andrew,

    This command works in the interactive simvision:

    probe -create -emptyok -database ams_database -flow {TB.TOP.INST_A} -inhconn_signal {TB.TOP.vdd}

    By the way, is there a way to include these type of tcl commands in the ADE in batch mode since I have more than 1000 of them to save and it is not practical to add these outputs in ADE's output pane?

    I can see the probed result from both the simvision and the ADE result browser and then I can use 'plot(i("TB.TOP.INST_A.vdd_$flow" ?result "trans"))' to plot it in Viva. With the pure Spectre simulator, I plot it by 'plot(IT("/TOP/INST_A/[@vdds:%:vdds!]").' Notice there is no leading "TB." Are these two plot commands the correct ones to plot the waveform with AMS and Spectre into Viva? I was expecting that I can still use schematic (CDBA) notation 'plot(IT("/TOP/INST_A/[@vdds:%:vdds!]")' to plot  it in AMS but it did not work.

    Thank you so much,

    TJ

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