Wideband Inductor-less LNA with Resistive Feedback and Noise Cancelation

Examensarbete för masterexamen

Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12380/125027
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Type: Examensarbete för masterexamen
Master Thesis
Title: Wideband Inductor-less LNA with Resistive Feedback and Noise Cancelation
Authors: Ström, Tobias
Abstract: In this master thesis a wideband, inductorless LNA for GSM and WCDMA with noise canceling is examined and designed in 90-nm RF CMOS process. The goal was to design a wideband LNA that could work as a drop in solution in ST-Ericsson’s receiver and have an input match below -12 dB for a bandwidth of 800 MHz to 2.5 GHz. The proposed LNA combines two techniques, resistive feedback and noise cancellation to provide both a wideband input match and good noise and linearity performance. The result is a wideband, differential LNA without any need for external matching components. Furthermore, the solution is inductorless which saves valuable area on chip. The LNA covers frequency bands within 800 MHz – 2.5 GHz with S11 below -12.8 dBm and provides a voltage gain of 27 dB. The NF is below 2.1 dB and IIP3 is greater than -4 dBm with a power consumption of only 28 mW. In the receiver test bench the mixer is used as load which results in a conversion gain higher than 24 dB, S11 below -12.8 dBm, NF below 4 dB and IIP3 higher than -6.2 dB. This solution has many features such as high bandwidth with a good input match, inductorless design saving area and costs and is fully differential.
Keywords: Datorteknik;Computer Engineering
Issue Date: 2010
Publisher: Chalmers tekniska högskola / Institutionen för data- och informationsteknik (Chalmers)
Chalmers University of Technology / Department of Computer Science and Engineering (Chalmers)
URI: https://hdl.handle.net/20.500.12380/125027
Collection:Examensarbeten för masterexamen // Master Theses

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