Title: Noise figure optimization of a noise-cancelling wide-band CMOS LNA
Abstract: This paper discusses noise figure optimization techniques for a noise-cancelling single-ended-to-differential CMOS low-noise amplifier (LNA). In [1], a low noise figure was obtained through cancellation of the drain noise of the common-gate transistor. Contour plots demonstrate that drain noise cancellation does not guarantee an optimal noise figure. The optimal noise figure is achieved by minimizing the un-cancelled noise contributions as well, and utilizing LC resonance to maintain common-gate transistor drain noise cancellation. An LNA with a 0.8-1.8 GHz bandwidth is designed with this optimization. Simulations show a noise figure between 2.8dB and 1.3dB, with S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</sub> ≈ 13dB over the bandwidth.
Publication Year: 2010
Publication Date: 2010-06-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 9
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