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Using saved corners by spectre in AMS simulator

MonaG

Hi,

I am doing Monte Carlo simulation on a design which is only have transistor level blocks using Spectre, and save some Monte Carlo samples as statistical corners. Then I want to add some behavioral blocks (blocks described with Verilog-A), and simulate the whole design in AMS simulator. But the problem is while AMS simulator works ok in nominal corner but I receive below error when I want to simulate the design for save statistical corners:

" simulator filed to complete the simulation:

Error found by spectre during hierarchy flattening.
ERROR (SFE-1997): "statAlters/Stat_seq_98_params_0" 2:
ADEXLMC_m_PM12_mc_p_25_sp_vth0_ma: parameter `dev': Invalid component
name `PM12' was given as value of parameter.
ERROR (SFE-1997): "statAlters/Stat_seq_98_params_0" 5:
ADEXLMC_m_I27_NM3_mc_n_25_sp_u0_ma: parameter `dev': Invalid component
name `I27.NM3' was given as value of parameter.
ERROR (SFE-1997): "statAlters/Stat_seq_98_params_0" 8:
ADEXLMC_m_PM20_mc_p_25_sp_u0_ma: parameter `dev': Invalid component
name `PM20' was given as value of parameter.
ERROR (SFE-1997): "statAlters/Stat_seq_98_params_0" 11:
ADEXLMC_m_PM14_mc_p_25_sp_u0_ma: parameter `dev': Invalid component
name `PM14' was given as value of parameter.
ERROR (SFE-1997): "statAlters/Stat_seq_98_params_0" 14:
ADEXLMC_m_PM14_mc_p_25_sp_vth0_ma: parameter `dev': Invalid component
name `PM14' was given as value of parameter.

...

"

I appreciate any help regarding this problem, Thanks.

Parents

  • I don't think that's a supported flow to create statistical corners with spectre, change the circuit, and then use those statistical corners with AMS. I think you need to create the statistical corners using Monte Carlo with AMS, and then simulate them using AMS (i.e. use the same simulator for both).

    I don't know for certain as I've never tried, but it seems unlikely to me that it would work switching simulators between sims.

    Regards,

    Andrew.

Reply

  • I don't think that's a supported flow to create statistical corners with spectre, change the circuit, and then use those statistical corners with AMS. I think you need to create the statistical corners using Monte Carlo with AMS, and then simulate them using AMS (i.e. use the same simulator for both).

    I don't know for certain as I've never tried, but it seems unlikely to me that it would work switching simulators between sims.

    Regards,

    Andrew.

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