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DC convergence.........URGENT help neede.....!!!!

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lijo911

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HI.........one of my friend is doin project on interconnects......His design has 3 modules......When he s using only

the 1st 2 modules, the output at every point is comin' quite perfectly....... Now when he simply inserts the 3rd

module into the design, which is driven by the 2nd module, the output at every module is gone.........even at the

first module which doesnt ve any direct connection to 3rd module.........Then v tried removing all the connections

to the 3rd module........still the same problem............so v then removed the VDD and GND of the 3rd module alone

and everything s fine for 1st and 2nd module........... So v think the problem could be because the DC convergence

algorithm is not able to find a solution with the 3rd module in the picture....... V tried giving a separate VDD and

GND for 3rd module alone....... still problem exits........So is the problem becoz Spectre simulator is not able to

converge the DC operating points??......Plz reply asap....... Thanx in advance.........

this is the last warning to you regarding using sms or short hand typing.. i will delete all your posts if found repeating this again
 
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