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convergence problem about EEHEMT1 model

Question asked by hsri on Jun 22, 2008
 We use EEHEMT1 model to design PA.Small-signal result is easily optimized well,but when optimize large-signal(HB),there is always a convergence problem.Why?
I have studide the EEHEMT1 model for 2 years.I extracted the model parameter myself.Are there some critical model parameter for EEHEMT1 model?(The IV curve is smooth of my model).Who please give me some more information on eehemt1 model,especially on parameter seting and convergence problem about eehemt1?
Thanks very much.