Ultra wideband low noise amplifier with resistive feedback and shunt inductive peaking

Abstract

Ultra Wideband (UWB) technology is very effective technology with huge data transmission rates over 3.1–10.6GHz frequency band with minimum utilization of power. Low noise amplifier (LNA) is typically the first stage of a receiver whose performance greatly affects the overall receiver performance. This work presents the design of UWB LNA with resistive feedback and shunt peaking techniques. A Cascode inductive degeneration LNA has been initially designed. Resistive shunt feedback LNA is generated from this basic topology. Bandwidth extension technique using shunt inductive peaking has been employed on the resistive shunt feedback LNA. The designs are simulated using Cadence Virtuoso Spectre using CMOS gpdk180 for 3.1–5GHz lower UWB applications. The resistive shunt feedback LNA shows a maximum voltage gain of 23.3 at 4GHz and a minimum NF of 1.67 at 4.2GHz using 1.8 V supply. The resistive feedback LNA which employs shunt inductive peaking technique has an extended 3-dB bandwidth of 4.21GHz compared to the basic resistive shunt feedback LNA that achieves 3.5GHz bandwidth.