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[ $8{\sim}10.9$ ]-GHz-Band New LC Oscillator with Low Phase-Noise and Wide Tuning Range for SONET communication  

Kim, Seung-Hoon (School of Electrical Engineering, Univ of Ulsan)
Cho, Hyo-Moon (School of Electrical Engineering, Univ of Ulsan)
Cho, Sang-Bock (School of Electrical Engineering, Univ of Ulsan)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.45, no.1, 2008 , pp. 50-55 More about this Journal
Abstract
In this paper, New LC VCO with $8{\sim}10.9$ GHz Band has been designed using commercial $0.35-{\mu}m$ CMOS technology. This proposed circuit is consisted of the parallel construction of the typical NMOS and PMOS cross-coupled pair which is based on the LC tank, MOS cross-coupled pair which has same tail current of complementary NMOS and PMOS, and output buffer. The designed LC VCO, which is according to proposed structure in this paper, takes a 29% improvement of the wide tuning range as 8 GHz to 10.9 GHz, and a 6.48mW of low power dissipation. Its core size is $270{\mu}m{\times}340{\mu}m$ and its phase noise is as -117dBc Hz and -137dBc Hz at 1-MHz and 10-MHz offset, respectively. FOM of the new proposed LC VCO gets -189dBc/Hz at a 1-MHz offset from a 10GHz center frequency. This design is very useful for the 10Gb/s clock generator and data recovery integrated circuit(IC) and SONET communication applications.
Keywords
LC VCO; CMOS; SONET; Phase Noise; Tuning Range;
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