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feedback

i am designing a certain IC that has an internal feedback (based on transisto level), how can I make initialization for the internal feedback?, as it makes the simulation locked.

Quek over 14 years ago

Hi Sam

In ADE-L, you can use "Simulation->Convergence Aids->Initial Condition" to set the initial voltage values for spectre simulation.

Best regards
Quek
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sam andro over 14 years ago

Hi Quek:

It did not solve the problem, the simulation still gets locked once i apply the feedback, but if
I break the feedback the simulation is working properly but the result has to based on the feedback.
any clue?!

Regards:
Sam
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Quek over 14 years ago

Hi Sam

Does "simulation gets lock" means that spectre hangs during simulation or spectre gives convergence error? May I have the following info?

terminal>spectre -W

Best regards
Quek
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sam andro over 14 years ago

Hi :

I do not know where is this information terminal>spectre -W?

but what I mean it is like the attached photo, where 2 inputs and gate, oneof the inputs is the inverted output, so it looks like a locked loop?

Regards:
sam
- Screenshot.png
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skillUser over 14 years ago

Hi Sam,
What Quek is asking for is the result of typing "spectre -W" at the Unix terminal (without the quotes) - this will show the version of the Spectre simulator. I'm not sure why that caused you any confusion?
regards,
Lawrence.
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sam andro over 14 years ago

thansk guys
I have fixed it

Regards;
Sam
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