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A 5-GHz fully integrated low-power wide-tuning-range CMOS LC VCO

✍ Scribed by Chang-Zhi Chen; Hao-Yu Fang; Yo-Sheng Lin; Chi-Chen Chen

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
337 KB
Volume
50
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A 5‐GHz‐band monolithic LC differential voltage‐controlled oscillator (VCO) with low‐power consumption and wide‐tuning‐range was designed and implemented using a standard 0.18‐μm CMOS technology. Low‐power consumption is achieved by maximizing the equivalent parallel resistance of the LC tank, while wide‐tuning‐range is achieved by minimizing the summed parasitic capacitance of the differential inductor and the cross‐coupled PMOS transistors pair. The LC VCO achieves a wide‐tuning‐range of 14.1% (from 4.95 to 5.7 GHz) with a low‐power dissipation of 1.5 mW. The measured phase noise is −111.1 dBc/Hz at 1‐MHz offset. The corresponding figure‐of‐merit (FOM′) of the VCO is −166.8 dBc/Hz, which is comparable with, or even better than, those of the reported state‐of‐the‐art CMOS LC VCOs in 5‐GHz‐band. The chip area is only 630 × 730 μm^2^ excluding the test pads. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2320–2332, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23638

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