Development of Dual Band Digitally Controlled Oscillator using Fibonacci Sequence in 0.18 um CMOS Process
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Development of Dual Band Digitally Controlled Oscillator using Fibonacci Sequence in 0.18 um CMOS Process
IEEE TENCON 2013——This talk presents a digitally controlled oscillator (DCO) in inductor-capacitor (LC) topology with dual -band and fine frequency tuning steps. Using special Fibonacci sequence method and additional capacitor in the capacitor bank, this DCO operates two differential frequency bands and achieves finer tuning range than that of a conventional binary sequence DCO. The proposed circuit is implemented in 0.18 um CMOS technology and tested. It has a high-band frequency of 4.01-4.54 GHz and low-band frequency of 3.41-3.74 GHz. The measured phase noise is –119.3 and -104.5 (dBc/Hz at 1MHz offset) at carrier frequency at 4.54 GHz and 3.41 GHz.
Guests ：
K. Miyahara
Keyword ：
数字控制振荡器 拓扑结构 斐波那契序列 DCO经营 CMOS技术Year：2013
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