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Ultralow Phase Noise and Wideband CMOS VCO Using Symmetrical Body-Bias PMOS Varactors

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3 Author(s)
Kuan-Chung Lu ; Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan ; Fu-Kang Wang ; Tzyy-Sheng Horng

This letter presents an ultralow phase-noise and wide turning-range CMOS voltage-controlled oscillator (VCO) for 5 GHz WLAN applications. The proposed PMOS-only VCO design with body-bias varactors achieves a tuning range of 20.4% and a phase noise of -138.4 dBc/Hz at 1 MHz offset. The total power consumption of the VCO core is 13.1 mW using a 1.8 V supply voltage. The achieved figure of merit with tuning range (FOMT) is -207.2 for the proposed CMOS VCO.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:23 ,  Issue: 2 )