[paper] ACM Model for CMOS Analog Circuits Hand Design

Ademirde Jesus Costa^ab, Eliyas Mehdipour^b, Edson PintoSantana^b,

and Ana Isabela Araújo Cunha^b

Application of Improved ACM Model to the Design by Hand of CMOS Analog Circuits

Microelectronics Journal

Available online 16 November 2021, 105309

DOI: 10.1016/j.mejo.2021.105309

   
a Instituto Federal da Bahia, Santo Amaro, Brazil
b DEEC, Escola Politécnica, Universidade Federal da Bahia, Salvador, Brazil

Abstract: This work aims to provide solutions and perspectives for CMOS analog designers by reducing the time spent in iteratively dimensioning the devices and simulating the circuits. For this purpose, by-hand design methodologies for a few analog cells are proposed employing a MOSFET compact model which has been earlier improved by adding sub-models for some second order effects. A semiempirical sub-model and characterization method is presented for the Early voltage, thus enhancing the set of model equations for hand calculations. The accomplishment of several by-hand design examples and the comparison between simulation results and specifications succeeded in demonstrating the usefulness and advantages of using the improved MOSFET compact model in the proposed methodologies.

Fig: gm/Id Plot