The Design Of 0.6 μm CMOS Technology 900MHz GSM Low Noise Amplifier And Mixer

With the development of the technology of wireless communication in recent decades, people have basicly realized the dream of communication anywhere and anytime. At the same time, the demand for high-performance and large-capability wireless communication systems has been on a great upsurge. Under such circumstances, researches in the field of radio and wireless communication IC become more and more heated. Now all kinds of wireless communication standard exists, but GSM system share the biggest market. Thus, it is important to research and design radio IC according GSM standard.Low noise amplifier(LNA) and Mixer is the key component in radio transceiver. As the standard of wireless communication upgrades from the second generation to the third generation in recent years, the performance such as noise figure(NF) and linearity of IC must be promoted. Simultaneously, in order to satisfy product's high performance and low cost, chips need a higher intergration. Therefore, radio transceiver must be fully monolithic integration.This paper introduces the fundamentals of LNA and Mixer, withing some common structure as well as their merits and demerits given out. The paper also gives a detailed analysis of the LNA with source inductor degeneration and CMOS commutating Gilbert Mixer, which are currently the most widely used. Based on the analysis, an optimized full differential inductor degeneration LNA and low voltage Gilbert Mixer is presented. This type of LNA and Mixer enjoys the advantages of the anterior LNA and Mixer, while resolves the problem of inductor's mismatch and mixer's high power voltage and low linearity.The inductor per se in CMOS process and the MOSFET's noise is an important issue in designing LNA and Mixer. This thesis specially introduced the inductor's modeling and the MOSFET's radio and noise model, and discussed the simulation result under the influence of different model.The final part of the paper presents a LNA and Mixer chip fabricated in 0.6 m CMOS technology used for GSM system. The simulation results and the layout design are provided . The results indicate that this cascade LNA and Mixer is compliant with GSM specifications. More will be obtained after the wafer testing.