Stability Analysis of Multifinger CMOS RF Amplifiers

Abstract

Stability analysis is an important criterion which should be assessed at the starting of an amplifier design. In this paper, a graphical method is proposed to make a perfect trade-off between stability and noise figure (NF) when bias voltages and transistor sizes are evaluated. A single stage amplifier operating at 1 GHz is designed with Keysight’s Advanced Design System (ADS) in 0.18 um CMOS process to justify the validity of the proposed method.