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10-GHz CMOS quadrature LC-VCO for multirate optical applications
2003 (English)In: IEEE Journal of Solid-State Circuits, ISSN 0018-9200, Vol. 38, no 10, 1626-1634 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2003. Vol. 38, no 10, 1626-1634 p.
Keyword [en]
bimodal oscillation, jitter, multirate, oscillators, phase ambiguity, quadrature, SONET, voltage-controlled oscillator (VCO), design
URN: urn:nbn:se:kth:diva-22841DOI: 10.1109/jssc.2003.817258ISI: 000185568500005OAI: diva2:341539
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Ismail, Mohammed
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