A low-phase-noise 5-GHz CMOS quadrature VCO using superharmonic coupling

被引：227
|
作者：
Gierkink, SLJ [1 ]
Levantino, S
Frye, RC
Samori, C
Boccuzzi, V
机构：
[1] Agere Syst, Commun Circuits Res Dept, Allentown, PA 18109 USA
[2] Politecn Milan, Dipartimento Elettron & Informazione, I-20133 Milan, Italy
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2003年 / 38卷 / 07期
关键词：
CMOS analog integrated circuit; image rejection; injection locking; jitter; oscillators; phase noise; quadrature; voltage-controlled oscillator (VCO); wireless LAN;
D O I：
10.1109/JSSC.2003.813297
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A new concept for quadrature coupling of LC oscillators is introduced and demonstrated on a 5-GHz CMOS voltage-controlled oscillator (WO). It uses the second harmonic of the outputs to couple the oscillators. The technique provides quadrature over a wide tuning range without introducing any increase in phase noise or power consumption. The VCO is tunable between 4.57 and 5.21 GHz and has a phase noise lower than - 124 dBc/Hz at 1-MHz offset over the entire tuning range. The worst-case measured image rejection is 33 dB. The circuit draws 8.75 mA from a 2.5-V supply.
引用
收藏
页码：1148 / 1154
页数：7
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