Title page for etd-0806103-232307


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URN etd-0806103-232307
Author Peng Kuang-Yao
Author's Email Address m9039602@student.nsysu.edu.tw
Statistics This thesis had been viewed 5537 times. Download 5486 times.
Department Electrical Engineering
Year 2002
Semester 2
Degree Master
Type of Document
Language English
Title A Study of the Design Theory for Front-End CMOS Low Noise Amplifiers
Date of Defense 2003-07-01
Page Count 62
Keyword
  • CMOS Low Noise Amplifiers
  • Noise Figure
  • Abstract This thesis deals with two kinds of RF CMOS low noise amplifiers (LNA). The low power LNA and the image-reject LNA.
    The impact of gain, noise figure, and stability on RF CMOS image-reject LNA has been studied. Through this study, the fundamental properties of image-reject LNA can be understood by a simple but physical concept.
    A current-reuse RF CMOS source-degenerated cascode LNA is also presented, which adopts a combination of source-degenerated NMOS inverter and Cascode topology to improve gain and noise figure, the existent and well-studied technique from the design standpoint, makes optimization of the stage easy.
    A modification of the proposed architecture is also presented, which adopts internal filters to achieve the image rejection without additional image-reject filters that degrade both noise figure and power consumption. It will be a good candidate for low power implementation of CMOS RF-IC.
    Both circuits’ parameters except noise figures are simulated using TSMC 0.25 um RF CMOS component models. The noise models considered here include induced gate noise, thermal noise and shot noise [5]. The current-reuse source-degenerated NMOS inverter LNA noise figure is 0.7 dB, forward gain is 16 dB, and IIP3 is -15 dBm. The low power image-reject LNA noise figure is 0.7 dB, forward gain is 16 dB, IIP3 is -16 dBm, and image rejection is 20 dB at 1.6 GHz. Both LNAs operate at 2.4 GHz and consume about 6 mA under a 2.5 V voltage supply.
    Advisory Committee
  • Tzong-Lin Wu - chair
  • Huey-Ru Chuang - co-chair
  • Tzyy-Sheng Horng - advisor
  • Files
  • etd-0806103-232307.pdf
  • indicate accessible in a year
    Date of Submission 2003-08-06

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