An optimized 2.4 GHz VCO circuit design and simulation with high-Q MEMS LC-tank
Rahimi, Maryam and Jamuar, Sudhanshu Shekhar and Hamidon, Mohd Nizar and Ahmad, Mohd Rais and Mousavi, Sayed Alireza and Bayat, Mehdi (2010) An optimized 2.4 GHz VCO circuit design and simulation with high-Q MEMS LC-tank. International Journal of Electronics and Communications, 64 (5). pp. 413-424. ISSN 1434-8411
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This paper focuses on design of high-performance MEMS LC-tank circuit for use in CMOS voltage controlled oscillators (VCO) operating at 2.4 GHz. The high-Q air suspended inductor has been designed by inductance of 2.87 nH using MEMS technology to reduce the resistive loss and the substrate loss. A MEMS two-gap tunable capacitor has been designed. The DC voltage is 2.5 V which is applied to the plates and the results of 2.04 pF could be achieved. The pull-in voltage has been optimized to achieve low phase noise, low power consumption VCO. Through this optimization, less phase noise (−117.7 dBc/Hz at 100 KHz) and lower power consumption (11 mW) have been obtained.
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