A Methodology for the Design of Capacitive Feedback LNAs based on the gm/ID Characteristic

This paper presents a g
_m
/ID based design methodology for a capacitive feedback LNA topology. The proposed method gives the optimal value of g
_m
/ID to achieve the required performances (Gain and Noise Figure) while ensuring the minimum consumption. Moreover, it makes possible the sizing of all the components of the structure with a degree of freedom for the inductance value needed for the input power matching. This methodology is illustrated through the design of a 2.4GHz LNA in the 28nm FDSOI technology from STMicroelectronics.