A Low-Power and Low-Noise 4-12 GHz Buck CMOS Low-Noise Amplifier with Current-Reused Technique

Abstract

In this paper,a wideband fully integrated Low power and Low Noise Amplifier(LNA) is presented.It has a 8 GHz (from 4 GHz to 13 GHz) bandwidth and excellent Noise Figure (NF) using 65 nm CMOS technology.This LNA was designed utilizing a current-reused and a cascode gain boost technique.In addition, the interstage inductors parallel peaking to reduce the roll down of high frequency gain and achieve high broadband gain.The proposed LNA circuit achieved high and flat power gain of 23.5±1 dB with input return loss less than -8 dB in interest bandwidth (4-12 GHz).Flat NF is 3.3dB±0.5 dB and the NFmin is a staggering 2.8 dB.In reaching the above performance,the third-order input point(IIP3) also reached -10.78 dBm, which is also agreed to be excellent.The LNA consumes 6.07 mW from a 1.2 V supply and occupies a layout area of 0.53×0.55 mm.