An ultra-low-power integrated RF receiver for multi-standard wireless applications

Abstract

In this paper, an ultra-low-power integrated RF front end for multi-standard is proposed. It contains a current-reuse low-noise amplifier (LNA) and a single-balanced mixer. The double resonances network helps to achieve a good input impedance matching in the required band and suppress out-of-band noise. The stacked common source (CS) LNA is adopting current-reuse of the two amplifier stages and re-using bleeding current of the mixer, which save working current considerably. By employing forward body bias technique, the proposed circuit can operate at a reduced supply voltage. In addition, the local oscillator (LO) signal forward body bias technique improves the transistors' switching characteristic, which optimizes noise figure (NF) and linearity performances simultaneously. Fabricated in the chartered 0.18-µm RF CMOS technology, the S11 of the front-end is below -14 dB in 935~960 MHz, below -11 dB in 1805~2483 MHz. It achieves a conversion gain of 18.6~20.8 dB, the double sideband (DSB) NF of 2.3~5.1 dB. The IIP3 are -8.2 dBm at 935 MHz and -9.8 dBm at 2100 MHz. It consumes 2.1 mA from a 1 V supply voltage and occupies an active area of only 0.61 × 0.53 mm 2 .

Advances on intelligent algorithms for scientific computing: an overview

“…Non-linear systems present a significant challenge for modeling, analysis, and control because their output cannot be described simply by a linear relationship with the input, and their dynamics may exhibit complex behaviors such as chaos or periodicity. The study of non-linear systems is critical to many fields, including control engineering (Xiao et al, 2017b;Zhou et al, 2022), signal processing (Jin, 2014;Luo and Xie, 2017), dynamics analysis (Tan and Dai, 2016;Tan et al, , 2019aLu et al, 2020), and communication systems (Jin and Yu, 2012;Jin and Fu, 2013;Jin et al, 2015b;Zhao et al, 2020;Xiang et al, 2022), owing to the following properties.…”