Abstract
In this paper, a two-stage design of a parallel-RC feedback low-power low-noise amplifier (LNA) that can be used in long-range (LoRa) applications is presented. The first stage involes a common-source amplifier intended to decouple the noise figure (NF). To obtain broadband input matching, a parallel resistance-capacitance shunt feedback is proposed. Furthermore, a source inductance is used to boost the range of adjustments between the gain and noise circle. The second stage involves achieving a higher gain with a cascade architecture. The gain(S21), output return loss(S22), and NF of the LNA were 17.5 dB, −23.3 dB, and 2.6 dB. The power dissipation is 7.2mW. The LNA was simulated in the Advanced Design System (ADS) software and fabricated using a TSMC 1P6M 0.18µm CMOS process.
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