A Wideband Low Power VCO for IEEE 802.11a Anchlia, A.; Sharma, D.; Solid-State and Integrated Circuit Technology. ICSICT '06. 8th Page(s):1550 - 1552 積體電路設計研究所 指導教授 : 林志明 教授 學生 : 郭峻瑋

Outline Abstract Introduction Circuit Design Simulation Results Conclusion

Abstract the VCO is implemented in 0.25-um technology a tuning range of 1.35GHz, from 4.93GHz to 6.28GHz low phase noise of -116.1dBc/Hz @1MHz offset from 5.7GHz carrier

Introduction complementary cross-coupled structure wide tuning range without any switching between varactors 802.11a standard has three bands in the frequency range of 5.15-5.825GHz

Circuit Design Fig. 1 Schematic of the LC VCO Implemented

Fig. 2 CV Characteristics of Accumulation Mode Varactor

Fig. 3 Details of the Varactor Group Implemented

Fig. 4 Shifted CV Curves

Simulation Results Fig. 5 VCO Tuning Curve

Fig. 6 Phase Noise for Center Frequency of 5.7GHz

Fig. 7 Phase Noise Variation with Carrier @1MHz Offset

Conclusion