Automatic Initial Sizing of Operational Amplifiers with Support of Weak, Moderate and Strong Inversion

Konferenz: ANALOG 2020 - 17. ITG/GMM-Fachtagung
28.09.2020 - 30.09.2020 in online

Tagungsband: ITG-Fb. 293 Analog 2020

Seiten: 4Sprache: EnglischTyp: PDF

Abel, Inga; Graeb, Helmut (Chair of Electronic Design Automation, Technical University of Munich, Germany)

This paper presents a method to automatically size op-amps using simple transistor models. A constraint program based on analytical formulas is used to initially size the op-amps which emulates the manual analog design process. While analytical equations are used to model the transistors in weak and strong inversion, the gm/Id-method based on look-up tables is used for the transistor model in moderate inversion. Experimental results are presented for an op-amp with transistors in the three inversion regions.