10-GHz CMOS quadrature LC-VCO for multirate optical applications

被引：88
作者：
Li, SG [1 ]
Kipnis, I
Ismail, M
机构：
[1] Intel Corp, Fremont, CA 94538 USA
[2] Intel Corp, San Francisco, CA 94105 USA
[3] Ohio State Univ, Dept Elect & Comp Engn, Analog VLSI Lab, Columbus, OH 43210 USA
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2003年 / 38卷 / 10期
关键词：
bimodal oscillation; jitter; multirate; oscillators; phase ambiguity; quadrature; SONET; voltage-controlled oscillator (VCO);
D O I：
10.1109/JSSC.2003.817258
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 10-GHz quadrature LC-VCO (QVCO) fabricated in a 0.13-mum CMOS process for 10-Gb/s multirate optical applications is described. Bimodal oscillation behavior (or phase ambiguity) inherent to quadrature LC-VCOs is analyzed theoretically and a cascode-based coupling method is proposed which effectively eliminates bimodal oscillation. Digitally controlled capacitor arrays are used in this design to extend the tuning range of the QVCO to cover multirate operations. The QVCO achieves a jitter generation of only 32 mUI(pp) at 10 GHz and a phase poise of -95 dBc/Hz at 1-MHz frequency offset with only 8 mA of current consumption in the QVCO core.
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页码：1626 / 1634
页数：9
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