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A wideband balun–LNA
Affiliation:1. Department of Electrical and Computer Engineering, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran;2. Department of Computer Engineering, Tarbiat Modares University, Tehran, Iran;1. College of Communication Engineering, PLA University of Science and Technology, Nanjing, China;2. Nanjing Institute of Telecommunication Technology, Nanjing, China;3. National Mobile Communications Research Laboratory, Southeast University, Nanjing, China;4. College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China;1. Electronics Department, Faculty of Engineering, University of Djillali Liabes, BP 89 Sidi bel Abbes, Algeria;2. Department of Measurement Control & Information Technology, School of Instrumentation Science & Optoelectronics Engineering, BeiHang University, 100083 Beijing, PR China;1. School of Logistics Engineering, Wuhan University of Technology, China;2. School of Mechanical and Electrical Engineering, Wuhan University of Technology, China;3. School of Electronic and Information Engineering, Southwest University, China
Abstract:In this paper a wideband Low Noise Amplifier (LNA) is introduced which also converts the single-ended input to differential signal at the output. It is based on common-source amplifier with active-feedback to provide input matching. The proposed amplifier has the input matched from 500 MHz to 2.5 GHz. It achieves the maximum voltage gain of 24 dB in this band, while the minimum noise figure (NF) is 2.35 dB. The simulated OIP3 of this amplifier is equal to 21 dBm. The LNA has been designed and simulated in a 0.18 μm CMOS process.
Keywords:Balun  Imbalance correction  LNA  Wideband
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