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how to do small signal model for pHEMT

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kadikaram

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Hi,

In ADS, how to do the small signal model for pHEMT. Can Anybody help me to find that in step by step process..!

Note: I added PDK in my ADS, so i have device and its functions well. I did the IV characteristics, but i don't know how to find small signal model parameters.
 

pHEMPT is described by S parameters for specific frequency band. To convert S parameters to spice model you can use EMwonder software. But I think ADS may have subcircuit that accept S parameters for such analysis.
 

skroz said:
pHEMPT is described by S parameters for specific frequency band. To convert S parameters to spice model you can use EMwonder software. But I think ADS may have subcircuit that accept S parameters for such analysis.
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S-parameters cnnot be converted to SPICE parameters due to their linear and small signal nature.An equivalent circuit contained RLCk and dependent voltage/current sources may be obtained but it won't be used in nonlinear simulations.Since you have obtained IV curves, why don't you use Model Extaction softwares ? Because there are many variants of few particular models like TOM, Skellern-Parker etc. for pHEMT devices and they have practically pos an cons.
 


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