Which frequencies can Eldo RF handle?
A – There is no built-in limitation to the frequencies that Eldo RF can handle. The algorithms can be used at any frequency. The limitations come from the accuracy and availability of the device models for high frequency usage. In an IC design context, which is the usage context for Eldo RF, foundries usually provide the device models, after thorough characterization of their process. The device models are ‘valid’ (i.e. they accurately represent the device behavior) up to a certain frequency, which becomes the practical usage limit. The typical maximum frequencies for state-of-the-art RF processes are in the range of a few GHz. For example a foundry may provide models for its 0.25um RF process, which are valid up to 10GHz. If the user wants to simulate beyond this frequency, and ultimately fabricate an IC operating beyond this frequency, he can do it. Eldo RF will simulate without complaining, but the results of the simulation may not match the silicon (they probably won’t). However, t
