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Hspice err:internal timestep too small in transient analysis

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ehsan_r34

ehsan_r34

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Hspice error

Please tell me why the following error occured in Hspice?
my circuit is a switched cap circuit.

" **error**: internal timestep too small in transient analysis"

Please answer me as soon as possible.
Thanx

Added after 2 hours 19 minutes:

Can i increase the resolution of the analysis of Hspice?
 

Hspice error

it's the convergence problem.
i suggest you use the spectre as simulator to simulate switch cap circuit.
 

Hspice error

Increase the no of points in the .options statement

Added after 19 seconds:

THis will solve your convergence issue
 

Hspice error

try to give some initial condition
 

Hspice error

Add .ic or .nodeset can help.
 

Re: Hspice error

In SC circuits, this kind of error often be appeared in Hspice simulation.

You can add initial condition (.IC) or use large GMINDC (GMINDC>1e-9).

Good luck
 

Re: Hspice error

ehsan_r34 said:
Please tell me why the following error occured in Hspice?
my circuit is a switched cap circuit.

" **error**: internal timestep too small in transient analysis"


Added after 2 hours 19 minutes:

try with gshunt and cshunt options
Click to expand...
 

Hspice error

you may use method=gear
 

Re: Hspice error

you can select .option for help
 

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