A 1.2V, 0.1-6.0 GHz, Two-Stage Differential LNA Using Gain Compensation Scheme

A broadband low-noise amplifier (LNA) in a 0.13 mum CMOS is presented. The LNA consists of two cascaded gain stages. The first stage is a resistive feedback amplifier for an input impedance matching, and the second stage is an inductive peaking amplifier for gain compensation. Measurement results exhibit a voltage gain of 14 dB and a gain variation less than 1.7 dB over the frequency range of 0.1 to 6.0 GHz. Its input return loss is below -8.3 dB and the noise figure is 4.0 to 4.7 dB across the bandwidth. The LNA consumes 16 mW from a 1.2 V supply and occupies 0.13 mm
²
.