使用Bottom-series架構之1.17GHz Colpitts差動對四相位壓控振盪器

A 1.17GHZ Differential Colpitts QVCO with Bottom Series Topology

陳凰美(Hwan-Mei Chen) ； 林志駿(Chin-Chun Lin) ； 林家慶(Jia-Cing Lin)

《技術學刊》 23卷4期 (2008/12) Pp. 225-229

https://doi.org/10.29507/JT.200812.0003

摘要

本論文之QVCO (Quadrature Voltage Control Oscillator)是使用Colpitts差動對架構並結合底部串接(Bottom-series)的技術。使用Colpitts差動對來提升導納，且使得電路容易振盪以及底部串接技術來耦合訊號，可以降低相位雜訊而不引入主動元件之閃爍雜訊(flicker noise)。利用標準TSMC 0.18-μm 1P6M CMOS製程製作晶片。在1.8V的工作電壓，消耗功率爲15.4mW，在偏移主頻率1MHz的相位雜訊爲-133.7dBc/Hz，效能指數(figure of merit, FoM)爲-183.2，晶片面積爲0.873×0.55平方公厘。

關鍵字

四相位壓控振盪器 ； 低相位雜訊

並列摘要

This paper presents a QVCO which is based on differential Colpitts topology and improved with bottom-series technology. Using differential Colpitts topology, the transconduction of the circuit is enhanced and the start-up condition is improved. Using bottom-series technology, the phase noise is reduced. The prototype is implemented using TSMC 0.18 μm 1P6M CMOS process technology. With 1.8 V supply voltage, total power consumption is 15.4 mW and phase noise of the VCO is -133.7 dBc/Hz at 1 MHz offset from the carrier frequency of 1.17 GHz. The figure of merit is -183.2. The chip area is 0.873×0.55 mm^2.

並列關鍵字

QVCO ； low phase noise ； differential colpitts ； bottom-series