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A 0.7 V, Ultra-Wideband Common Gate LNA with Feedback Body Bias Topology for Wireless Applications

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Department of Electronics & Communication Engineering, Guru Jambheshwar University of Science & Technology, Hisar, Haryana 125001, India
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Department of Electronics & Communication Engineering, Shri Mata Vaishno Devi University Katra, Jammu and Kashmir 182320, India
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University School of Information, Communication & Technology, Guru Gobind Singh Indraprastha University, New Delhi 110078, India
*
Author to whom correspondence should be addressed.
J. Low Power Electron. Appl. 2018, 8(4), 42; https://doi.org/10.3390/jlpea8040042
Received: 18 September 2018 / Revised: 20 October 2018 / Accepted: 22 October 2018 / Published: 26 October 2018
An ultra-wideband (UWB) low noise amplifier (LNA) for 3.3–13.0 GHz wireless applications using 90 nm CMOS is proposed in this paper. The proposed LNA uses an improved common-gate (CG) topology utilizing feedback body biasing (FBB), which improves noise figure (NF) by a considerable amount. Parallel-series tuned LC network was used between the common-gate first stage and the cascoded common-source (CS) stage to achieve the maximum signal flow from CG to CS stage. Improved CS topology with a series inductor at the drain terminal in the second stage connected and cascoded CS third stage provides high power gain (S21) and bandwidth enhancement throughout the complete UWB. A common-drain buffer stage at the output provides high output reflection coefficient (S22). It achieves an average power gain (S21) of 14.7 ± 0.5 dB with a noise figure (NF) of 3.0–3.7 dB. It has an input reflection coefficient (S11) less than −11.7 dB for 3.3–13.0 GHz frequency and output reflection coefficient (S22) of less than −10.6 dB with a very high reversion isolation (S12) of less than −72.4 dB. It consumes only 5.2 mW from a 0.7 V power supply. View Full-Text
Keywords: common-gate; feedback body bias; low noise amplifier; low power; UWB; wireless communication common-gate; feedback body bias; low noise amplifier; low power; UWB; wireless communication
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Singh, V.; Arya, S.K.; Kumar, M. A 0.7 V, Ultra-Wideband Common Gate LNA with Feedback Body Bias Topology for Wireless Applications. J. Low Power Electron. Appl. 2018, 8, 42.

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