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A Low-Power K-Band CMOS VCO With Four-Coil Transformer Feedback

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4 Author(s)
Szu-Ling Liu ; Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Kuan-Han Chen ; Tsu Chang ; Chin, Albert

A K-band low-power and low-phase-noise voltage-controlled oscillator (VCO) is presented in this letter. By utilizing four-coil transformer feedback and forward body bias topology, good performances are obtained under a low-power supply with a 5.1% tuning range and a phase noise of -109.8 dBc/Hz at 1 MHz offset from the 21.37-GHz carrier frequency. The core circuit of this VCO only consumes 3.5 mW with a 0.6-V supply voltage and a 0.55-V body bias.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:20 ,  Issue: 8 )