Design and analysis of a sleep and wake-up CMOS low noise amplifier for 5G applications
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Design and analysis of a sleep and wake-up CMOS low noise amplifier for 5G applications A. Andrew Roobert1
· D. Gracia Nirmala Rani2
Accepted: 5 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract This brief proposes a two-stage cascoded CMOS LNA with common drain envelope detection based power reduction method for the 5G applications of 28 GHz frequency. Dual inductive peaking and stagger tuning techniques are involved to get a 3 dB bandwidth of 2.25 GHz from 26.75 to 29 GHz. Besides, 22 dB of gain is provided by the proposed LNA. Inductive source degeneration helps to reduce the Noise Figure (NF) of the first cascoded stage, and a 2.3 dB of NF is observed in the LNA. The primarily amplified signals from the first cascoded stage are fed to the envelope detector and the second cascoded stage. When the RF signal is received, the envelope detector output will be high, and it turns on the second cascoded stage. In the existing method, the combination of a diode-connected transistor, low pass filter and buffer has been used for the envelope detection. A common drain transistor with an active resistor and capacitor is used in the envelope detection of the proposed method. Here, the power consumption of the LNA is reduced by 25.26% at the sleep mode. The proposed LNA consumes 9.5 mW and 7.1 mW of power from a 1.5 V supply at the active state and sleep state respectively. It requires 0.1235 mm2 of core area in 90 nm technology. Moreover, the behavior of the circuit under process corner variation and temperature variation is analyzed, and Monte–Carlo analysis is performed. Keywords CMOS LNA · Envelope detection · 5G applications · Mobile communication · Power reduction
1 Introduction In recent years, 5G communication gets important due to high-speed data requirements. When compared with the previous generation of mobile communication, 5G requires higher frequency and bandwidth [1]. There is a huge difference between the center frequency of 5G and that of previous generations; as an example, 28 GHz is one of the frequency bands recommended by 3GPP for the center frequency in 5G [2]. As the frequency increases, the power consumption of the circuit increases [3]. Thus the Low Noise Amplifier (LNA) designed for 5G communication has high power con-
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A. Andrew Roobert [email protected] D. Gracia Nirmala Rani [email protected]
1
Department of Electronics and Communication Engineering, Francis Xavier Engineering College, Tirunelveli 627 003, Tamilnadu, India
2
Department of Electronics and Communication Engineering, Thiagarajar College of Engineering, Madurai 625 015, Tamilnadu, India
sumption [4], and it requires power reduction methods to be used in mobile phone receivers. The gain of the LNA is increased by the cascoded configuration. It has the Common Source (CS) configuration as the main amplifier and Common-Gate (CG) configuration as cascode amplifier. Generally, the CS configuration has high input impedance, and the CG configuration has a high output impedance. Good isol
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