1/f noise in MOSFETs is a subject for continual study. Multiple noise models have been derived and studied. Each of these have some advantages and disadvantages. At Signal Processing Group Inc.we have used a simple model of 1/f MOSFET noise for some time. It has served its purpose in allowing us to at least estimate the 1/f noise for our design purposes. By using some kind of thumb rule, most appropriate to a particular design it is quite possible to use this model effectively. Interested readers are invited to read a brief paper on this subject released by a SPG technical team. Please click on the free papers… link on the SPG website.