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"Internal Timestep too small" error. Help needed

Question asked by maam_13 on Jun 11, 2013
Hi all,

I have this problem every time I increase the value of RF chokes (L4 and L5) above 5nH. The simulation gave an error message: 

" Internal timestep 5.90440e-24 too small at time 4.00940e-10. "

How could I solve this problem? I'm designing current mode class-D RF amp with HEMT as used transistor.

Thank you