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Transient simulation taking too much memory

vshssvs7

Sir,

I have to run a transient simulation of a transistor-level Charge Pump PLL. I have noticed that it is taking too much memory. icfb got shutdown by itself with this message at the terminal:

ERROR: Unable to allocate memory for transition file slice variable transition index level (read).

The simulation was not complete and it shutdown in between. The size of tran.tran.trn is around 40 GB.

Note that I have already done this: In Analog Design Environment, Outputs -> Save All, I have checked "selected" option in "select signals to output (save)" and Outputs -> to be saved -> select on schematic and selected few nets that I wanted to save

But even after doing the above, it is still saving every net (because I'm able to plot those nets) which is the reason for such a huge tran.tran.trn file. What more should I do to stop it from saving every net? (and only save the nets that I select) 

 

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  • Sir, even though it should save only 'vctl', I'm still able to plot other nets (Results -> Direct plot -> transient signal). Why is that so? (If it didn't save other nets, how is it able to plot them?) I hope you understood my doubt.

    Thanks. 

Reply

  • Sir, even though it should save only 'vctl', I'm still able to plot other nets (Results -> Direct plot -> transient signal). Why is that so? (If it didn't save other nets, how is it able to plot them?) I hope you understood my doubt.

    Thanks. 

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