A sub-mW 2.9-dB noise figure Inductor-less low noise amplifier for wireless sensor network applications |
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| Affiliation: | 1. Naval University of Engineering, College of Electronic Engineering, Wuhan 430033, China;2. Yunnan Nationalities University, Academy of Mathematics and Computer Science, Kunming 650500, China;1. Department of Electronics & Computer Engineering, National Institute of Technology Arunachal Pradesh, Yupia, Dist–Papumpare, 791112, India;2. Electronics and Communication Engineering Department, National Institute of Technology Agartala, Jirania 799046, India;1. Department of Electrical Engineering, Yuan Ze University, Taoyuan, Taiwan, ROC;2. Department of Electronic Engineering, Ming Chi University of Technology, Taishan, New Taipei City, Taiwan, ROC;3. College of Physics and Information Engineering, Fuzhou University Fuzhou, PR China |
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| Abstract: | In this paper, a low power differential inductor-less Common Gate Low Noise Amplifier (CG-LNA) is presented for Wireless Sensor Network (WSN) applications. New Shunt feedback is employed with noise cancellation and Dual Capacitive Cross Coupling (DCCC) techniques to improve the performance of common gate structures in terms of gain, Noise Figure (NF) and power consumption. The shunt feedback path boosts the input conductance of the LNA in current reuse scheme. Both shunt feedback and current reuse bring power dissipation down considerably. In addition, the positive feedback is utilized to cancel the thermal noise of the input transistor. The proposed LNA is designed and simulated in 0.18 µm TSMC CMOS technology. Post layout Simulation results indicate a voltage gain of 16.5 dB with −3 dB bandwidth of 100 MHz–3 GHz. Also third order Input Intercept Point (IIP3) is equal to + 1 dBm. The minimum NF is 2.8 dB and the value of NF at 2.4 GHz is 2.9 dB. S11 is better than −13 dB in whole frequency range. The core LNA consumes 985 µW from a 1.8 V DC voltage supply. |
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| Keywords: | Common-Gate Low Noise Amplifier (CG-LNA) Shunt feedback Inductorless Dual Capacitive Cross Coupling (DCCC) Noise cancellation Wireless Sensor Network (WSN) |
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