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different simulation results issue

oweny

I get different simulation results when simulating op amp offset voltage by dc or transient. It's different when I use ade explorer ,while it‘s same when I use ADE XL. Both of the simulations are using aps. After my attempt, I find that both of them are the same when I set high performance simulation by spectre. However,result in ADE explorer turns different when  I set high performance simulation by aps but result in ADE XL is still same. Is there anything wrong with my ADE explorer? Theoretically，dc offset should be equal to transient offset when i set amp as unit gain buffer, which simulation result is reliable?

Parents

  • If the results are different, it must be because either the netlist is different or the command-line options to Spectre are different. It may be that both results are correct and your circuit has more than one stable operating point (of course, that may or may not be desirable, but a function of the circuit). It's not that likely to there being something wrong with ADE Explorer, but hard to know without seeing your set up and data.

    I'd start by checking the input.scs you get in both cases and check the command-line arguments (in the Spectre log  file) to look for details.

    This is the kind of thing that contacting customer support (submit a support case after logging in) would be the best approach.

    Andrew

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  • If the results are different, it must be because either the netlist is different or the command-line options to Spectre are different. It may be that both results are correct and your circuit has more than one stable operating point (of course, that may or may not be desirable, but a function of the circuit). It's not that likely to there being something wrong with ADE Explorer, but hard to know without seeing your set up and data.

    I'd start by checking the input.scs you get in both cases and check the command-line arguments (in the Spectre log  file) to look for details.

    This is the kind of thing that contacting customer support (submit a support case after logging in) would be the best approach.

    Andrew

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