Hi Arpad, You write: "These languages are standard languages and there are multiple EDA tools supporting them so there is no need to write the same model in multiple languages. The only problem is that the *-AMS languages are not as widely supported..." There is another issue with AMS languages (and HSPICE netlists) in that the encrypted version are (of necessity) proprietary. Encryption (or at least IP hiding) is vital for model distribution. AMI uses the nature of the C compilation process, which hides IP in cryptic (albeit not strictly encrypted) machine code. AMS would require multiple versions of each, each re-encrypted for each tool. -- Colin PS If any vendor wishes to encrypt their HSPICE or Verilog-A models using the ADS IP Encoder so that our mutual customers can use the models in ADS, please contact me! http://signal-integrity-tips.com <http://signal-integrity-tips.com/>