A low phase noise quadrature LC VCO using capacitive common-source coupling

被引：0
|
作者：
Soltanian, Babak [1 ]
Kinget, Peter [1 ]
机构：
[1] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA
来源：
ESSCIRC 2006: PROCEEDINGS OF THE 32ND EUROPEAN SOLID-STATE CIRCUITS CONFERENCE | 2006年
关键词：
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A low phase noise quadrature LC VCO with inherent tail-current shaping is presented. Two identical differential LC VCOs are locked in quadrature with a capacitor connected between their common-source nodes. This capacitor further drives the oscillators into a tail-current shaping mode, which increases their oscillation amplitude and reduces their phase noise. A multi-band 1.9 GHz differential nMOS quadrature LC VCO prototype has been fabricated in a 0.25 mu m BiCMOS process. The measured phase noise is -124.4 dBc/Hz at a 1 MHz offset from a 2.07 GHz carrier while the circuit dissipates only 3 mW from a 1.5 V supply. The quadrature VCO is tunable from 1.75 GHz to 2.1 GHz and the VCO core only occupies 0.625mm(2).
引用
收藏
页码：436 / +
页数：2
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