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

Abstract 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 μm 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 2 and consumes 6.16 mW in high-gain mode from a 1.8 V power supply.

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