Reconfigurable Ultra Low Power LNA With and Without in Band Interference Rejection for IoT Application

  • Abhishek Gautam
  • Prof. Pramod Kumar Jain


In this paper, a reconfigurable Ultra low power Low Noise Amplifier (LNA) is presented. In this work,subthreshold driven Common Gate (CG) input stage is modified to provide wideband input matchingand a current reuse noise cancelling technique is introduced toimprove noise performance. Additionally, substantial reductionin power consumption is obtained by driving the MOS devices insubthreshold region.To provide dual output i.e. with and without Interference Rejection a High Isolation and Low Insertion Loss SPDT Switch is used. Negative Gm Based LC Series Notch Filter is used for the interference rejection. This Circuit achieved a gain of 10 dB (1 dB) with NF 6.3-7.2 over the bandwidth of 1.5-5.5 GHz in one port and 35dB Inference rejection of Narrow band @2.45GHz, A very high Isolation is obtained between the two ports i.e. 54dB. This is suitable for IOT Wireless Sensor Nodes. The circuit is simulated in Cadence Virtuoso using Spice Models in TSMC 65nm node.

Keywords: Ultra-Low Power LNA, SPDT Switch, Notch Filter.


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[1] A.R. Aravinth Kumar, BibhuDattaSahoo, Ashudeb Dutta “A wide band 2-5GHz Noise Cancelling Subthreshold Low Noise Amplifier” IEEE Transaction of Circuit and System II July 2018,
[2] M. Paravizi, K.Allidina and M.N. El-Gamal, “Short Channel output Conductance Enhancement Through forward Body Biasing to Realize a 0.5V 250 uW 0.6-4.5 GHz Current Reuse LNA” IEEE J. of Solid State Circuts, vol.51,no.3,pp.574-586 March 2016.
[3] A.R.A Kumar, A. Dutta, S.G. Singh, “A 1.5-7.5 GHz Low Power LNA Design Using Subthreshold Technique for Wireless Sensor Network(WSN) Application”, IEEE ISCAS pp.1943-1946, May 2016
[4]Wei Wu, O.Novak, C.T. Charles, Xiayo Fan, “A Low Power 3.1-5GHz Ultra-wide band Low Noise Amplifier Utilizing Miller Effect”, IEEE Int. Conference on UWB, pp.255-259, sept 2009,
[5] Mei-Chao Yeh, IEEE, Zuo-Min Tsai, Ren-Chieh Liu, Member, Ying-Tang Chang, and Huei Wang, “Design and Analysis for a Miniature CMOS SPDT Switch Using Body-Floating Technique to Improve Power Performance”, IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 54, NO. 1, JANUARY 2006
[6] Shuen-Chien Chang, Sheng-Fuh Cha, Ting-YuehChih,and Jian-An Ta “An Internally-Matched High-Isolation CMOS SPDT Switch Using Leakage Cancellation Technique”, IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 17, NO. 7, JULY 2007
[7] Mary Teshiba, Glenn Sakamoto, Terry Cisco , “A Compact SPDT Switch in 0.18um CMOS Process With High Linearity and Low Insertion Loss” IEEE CSIC 2007
[8] Qiang Li, Member, IEEE, Y. P. Zhang, Kiat Seng Yeo, Member, IEEE, and Wei Meng Lim, “16.6- and 28-GHz Fully Integrated CMOS RF Switches with Improved Body Floating”, IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 56, NO. 2, FEBRUARY 2008
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How to Cite
Gautam, A., & Jain, P. P. K. (2018). Reconfigurable Ultra Low Power LNA With and Without in Band Interference Rejection for IoT Application. Asian Journal For Convergence In Technology (AJCT) ISSN -2350-1146, 4(II). Retrieved from