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A broadband multistage LNA with bandwidth and linearity enhancement

Nikandish, G ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1109/LMWC.2016.2605446
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2016
  4. Abstract:
  5. Design techniques to enhance bandwidth and linearity of broadband multistage low-noise amplifiers (LNAs) are presented. A feedback amplifier circuit is proposed to compensate for transistor gain roll-off with frequency in other amplifier stages and extend overall bandwidth. Moreover, a transistor width tapering in a multistage LNA is applied to improve linearity. These techniques are adopted in a three-stage monolithic microwave integrated circuit (MMIC) LNA implemented in a 0.1-μm GaAs pHEMT process. The LNA features 18-43 GHz bandwidth, 21.6 dB average gain, and 1.8-2.7 noise figure (NF). It exhibits output 1-dB compression point of 11.5 dBm at 30 GHz and consumes 70 mA bias current from a 2-V supply
  6. Keywords:
  7. broadband amplifier ; feedback amplifier ; low-noise amplifier (LNA) ; Bandwidth ; Broadband amplifiers ; Feedback ; Feedback amplifiers ; Microwave amplifiers ; Microwave integrated circuits ; Monolithic microwave integrated circuits ; Noise figure ; Reconfigurable hardware ; 1dB compression point ; Bandwidth enhancement ; Design technique ; Gaas phemt process ; Monolithic microwave integrated circuits (MMIC) ; Transistor gain ; Transistor width ; Low noise amplifiers
  8. Source: IEEE Microwave and Wireless Components Letters ; Volume PP, Issue 99 , 2016 ; 15311309 (ISSN)
  9. URL: http://ieeexplore.ieee.org/document/7576663/?reload=true