Linearity improvement of differential CMOS low noise amplifier

Maizan Muhamad (University of Malaya Universiti Teknologi MARA)
Norhayati Soin (University of Malaya)
Harikrishnan Ramiah (University of Malaya)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 14, No 1: April 2019

This paper presents the linearity improvement of differential CMOS low noise amplifier integrated circuit using 0.13um CMOS technology. In this study, inductively degenerated common source topology is adopted for wireless LAN application. The linearity of the single-ended LNA was improved by using differential structures with optimum biasing technique. This technique achieved better LNA and linearity performance compare with single-ended structure. Simulation was made by using the cadence spectre RF tool. Consuming 5.8mA current at 1.2V supply voltage, the designed LNA exhibits S21 gain of 18.56 dB, noise figure (NF) of 1.85 dB, S11 of −27.63 dB, S22 of -34.33 dB, S12 of −37.09 dB and IIP3 of -7.79 dBm.