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This paper presents a high-performance differential coupled frequency doubling voltage-controlled crystal oscillator (VCXO). Frequency doubling and low phase noise are realized through a novel g m -boosted differential Colpitts oscillator. Distributed varactor arrays are used to obtain wide frequency tuning range and high tuning linearity simultaneously. The proposed VCXO is fabricated...
A fully integrated 5.3 GHz low phase noise CMOS VCO for WLAN application was presented and simulated. Based on the analysis of the phase noise theory, a p-tail complementary cross-coupled pairs structure was adopted, and a high performance inductor and the AMOS varactor were designed. Through the simulation in 0.18µm CMOS TSMC technology, the phase noise achieved is −120 dBc/Hz at 1MHz offset from...
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