regarding long simulation in cadence

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us1710

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i am facing a problem, whenever i am going for long simulation in cadence spectre tool.
when i give square wave,then after a long time the input becomes constant dc signal instead of expected square wave. since the problem is in input itself , i am not getting the output also. please suggest me if any option is there in tool.
 

paste your netlist about the input
 

notice the step of tran.
you can set to 1n or more little and try
 

Some point/resolution is need to be set...i am not too clear of the same....herd of the problem...they got help from cadence online/cutomer help...one mail only
 

Hi,

Try to give the pulse input at the Stimuli level itself. I did face the same problem once where, in the spectre shematic itself I gave the source pulse, but even i didnt get the output from the sourCe, then i set the pulse at global stimuli, i could generate the pulse. Im not sure what was the problem, could be because of the Cadence setting.

Thanks,
Suria
 

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