170-862 MHz, 6.16 mW compact switched-gain low-noise amplifier

This paper presents a switched-gain low-noise amplifier (SGLNA). The proposed SGLNA achieves three-step variable gains by combining the current-steering and inter-stage impedance-mismatching techniques. The proposed amplifier was designed using a TSMC 0.18 mu m mixed-signal CMOS process. Post-layout simulation results demonstrate that the SGLNA achieves a gain range of -24.9-+21.8 dB and a noise figure range of 3.56-4.13 dB over the frequency range of 170-862 MHz. The S-11 and S-22 are both <-15 dB over the same frequency range. The SGLNA occupies an active area of 0.053 mm(2) and consumes 6.16 mW in high-gain mode from a 1.8 V power supply. (C) 2011 Elsevier GmbH. All rights reserved.