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Import Spice generated by Tempus

zaratustra

Hello,

Before asking my questions, here follows the software versions that I'm using:

virtuoso -W:  IC6.1.6-64b.500.11

spectre - W: 13.1.1.049

tempus and voltus - W: 15.14-s048_1

This is the flow I'm using:

1) I simulated a circuit using Voltus to obtain IR-DROP profiles (OK)

2) I imported the IR-DROP profiles into Tempus (OK)

3) I exported the critical path of the circuit from Tempus to spice (with the IR-DROP profiles - Command:    create_spice_deck ...).

4) I imported the generated spice by tempus into Virtuoso using SpiceIn.

 4.1) First problem: the generated spice uses "/" and when importing into Virtuoso it stops at the first "/", so I removed all slashes "/" from the spice. It worked, however, I would like to know if this is expected or if there's another solution?

E.g.:

XStage1 U3_INST_next_reg_24_/CP U3_INST_next_reg_24_/Q U4088/A Stage1

to

XStage1 U3_INST_next_reg_24_CP U3_INST_next_reg_24_Q U4088A Stage1

4.2) The importation worked fine without the "/" and now I have the schematics.

4.3) When I try to simulate using spectre, it complains: "ERROR (CMI-2198) Waveform is not defined in V5..." also in V10...

 Analyzing these Vsources, I understood the problem, however, I still don't know the solution.

 Problem: In spice, the IR-drops were defined as a PWL: "V1 U3_INST_next_reg_24_CP 0 PWL(+ 9.99999971718e-10        0
+ 1.0049999717e-09         0.71473...)

Those PWL were translated as a "wave" parameter which doesn't exist in Vsource (analogLib), therefore the values aren't being read. I can copy manually the values to the correct parameters from Vsource (t1, v1, t2, v2...), however, I have so many voltage sources and so many circuits that it would take too long. Anyone know if is there another solution?


Thank you in advance,

Raphael

Parents
  • zaratustra

    Hello Andrew,

    Thank you for your answer.

    You are saying to use: "spectrespp mycircuit.sp"? If yes, is it possible to run from Ocean script? Because I would use a simulation environment that I've created to simulate transient faults.

    I've also tried to simulate spice by creating a cell view (spice) and then copying the netlist, however, the symbol for this view is not created (I suppose it's because I have 32 subckts at the same level in the same netlist). Anyway, reading the Spectre manual I discovery this "spectrespp". Is this the direction you are suggesting?


    Regards,

    Raphael

Reply
  • zaratustra

    Hello Andrew,

    Thank you for your answer.

    You are saying to use: "spectrespp mycircuit.sp"? If yes, is it possible to run from Ocean script? Because I would use a simulation environment that I've created to simulate transient faults.

    I've also tried to simulate spice by creating a cell view (spice) and then copying the netlist, however, the symbol for this view is not created (I suppose it's because I have 32 subckts at the same level in the same netlist). Anyway, reading the Spectre manual I discovery this "spectrespp". Is this the direction you are suggesting?


    Regards,

    Raphael

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