Design of high gain high output matched narrow band LNA using induced degeneration topology for receiver applications

Agarwal, Nitin; Gupta, Manish; Kumar, Manish

doi:10.1007/s11235-021-00869-9

Cited by 2 publications

(2 citation statements)

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“…To create a resistive impedance at the input interface of the LNA, an inductance element is introduced between the source of M 0 and the ground. This approach makes use of the high-quality factor of L 1 and has been widely utilized in narrowband LNAs [2]. It can also enhance wideband LNAs in achieving impedance matching and optimized NF over target operation bands.…”

Section: Design Methodologymentioning

confidence: 99%

“…However, the challenge persists in ensuring consistent impedance matching throughout this wide frequency span. Conventional wireless receivers often rely on the inductor degenerated LNA, which possesses desirable attributes [1][2][3], but within a narrow frequency band centred around a single frequency [4,5]. Alternatively, distributed amplifiers (DAs) [6][7][8][9][10][11] offer enhanced impedance matching and high gain across a broader frequency range, albeit necessitating multiple inductors.…”

Section: Introductionmentioning

confidence: 99%

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Innovative techniques for achieving flat response in a dual-resonance ultra-wideband low-noise amplifier

Reddy,

Nath

2024

Phys. Scr.

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This paper introduces a two-stage ultra-wideband low-noise amplifier (UWB-LNA) intended to be used in wireless communication systems. The architecture uses a novel double-resonance load network in the first stage and resistive shunt feedback in the second stage to achieve wide bandwidth with a flat response. A common gate stage at the input port seeks to present a high-impedance load to the single resonant network, while concurrently shunt negative feedback, source degeneration, and cascoded feedback schemes are used to improve performance. In this respect, the cascoded feedback provides flat gain across a wide bandwidth, while the source degeneration helps in impedance matching. Post-layout foot-print for the UWB-LNA designed and simulated using Cadence Virtuoso 180nm technology is0.532 mm² with an operating frequency 3.1–10.6 GHz incorporated. Operating on a 1.8 V supply voltage, it consumes 6 mW of power. The amplifier achieves a maximum gain of 18.75 dB, maintaining a flat low noise figure of 3.15 dB across frequencies ranging from 3.1 to 10.6 GHz. Stability analysis using the Roulettes test confirms the reliability of the proposed LNA, with Kf > 1 and Δ < 1.

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Section: Design Methodologymentioning

confidence: 99%