STAT module can function as a biphasic amplitude filter.

V. Mayya and L.M. Loew.
IEE Proceedings Systems Biology, March 2005, Volume 2, Issue 1, p. 43-52

To access, view or copy the model described in this paper, log on to the Virtual Cell software. Go to File>Open>BioModel. In the BioModel Database dialog, scroll down and open Shared Models. Select user 'mayya', the public model is entitled 'STATmodulePaper'.