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该论文提出了一种单核LC VCO,通过可重构的Class-F-1和增强型Colpitts双模操作,实现了从8.9到21.9GHz的八倍频程覆盖,满足了多标准软件定义无线电收发器对单芯片宽频带低相位噪声振荡器的需求。
Emerging needs for incorporating multistandard or software-defined-radio transceivers onto a single chip necessitate oscillator signals with an octave coverage for enabling seamless full-range frequency synthesis. Although most current solutions, particularly in commercial products, rely on configurations that involve multiple oscillators, there is a strong demand for a single LC VCO that provides at least an octave frequency tuning range (FTR) and low phase noise (PN). Recent research has extensively explored multicore multimode operations to substantially extend the FTR of LC VCOs [1-5]. Among key benefits is the improvement in the PN due to the coupling of numerous identical VCO cores, though at the expense of power consumption. Additionally, any explicit loss from mode switching can be circumvented by effectively nullifying the currents flowing through the MOS switches. However, several unavoidable mechanisms can reduce the
Zehui Kang, Chen Yu, Liang Wu
Chinese University of Hong Kong, Shenzhen, China