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Save current values with a specific time step in Cadence Spectre (SPICE)

NKFET

Dear all,

I use Cadence Spectre 20.1 to do a SPICE simulation of a circuit. I want to save the current values of the VCC over time in a file (with high precision). For this, I use the below commands in my code:

.tran 1p 20n
simulator lang = spectre
save VCC:p

And run Spectre using: "spectre ++aps -format psfascii file.sp"

I could get the current values with this method but not with a regular time step. Is there a way to save current values with a specific time step (e.g., 1 ps)? I also attempted using the ".print" command but encountered the same issue, along with reduced precision.

Bests,
Nima

  • Nima,

    The best approach would be to use (in spectre syntax):

    tran tran stop=20n strobeperiod=1p

    The simulator still takes time steps where it needs to, but forces a solve at 1ps intervals too which means that the results are solved and not interpolated.

    Andrew

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