ACM model for analog design

The ACM model was developed considering the needs of analog designers. The fundamental parameter of the ACM model is the normalization current IS, which contains the basic information on the device, namely geometry, technology, and temperature. In ACM, the large and small signal parameters of the saturated MOSFET are simple rational functions of if and of transistor parameters IS, Cox and n, being Cox the total oxide capacitance and n the slope factor. if =ID/IS, the normalized drain current of a saturated MOSFET, indicates the inversion degree at the source end of the channel