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A 2.2-mW Backgate Coupled LC Quadrature VCO With Current Reused Structure

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4 Author(s)
Jong-Phil Hong ; Inf. & Commun. Univ., Daejeon ; Seok-Ju Yun ; Nam-Jin Oh ; Sang-Gug Lee

This letter presents a backgate coupled quadrature voltage-controlled oscillator (QVCO) which consists of a pair of current reused LC-VCOs. The proposed QVCO is designed for 2-GHz operation based on a 0.18-mum triple-well CMOS technology. Measurements show -102 and -124dBc/Hz at 100-kHz and 1-MHz offset, respectively. Compared to the conventional QVCO, the proposed QVCO dissipates significantly lower power (1.74mA from a 1.25-V supply) while showing good 1/f3 close-in phase noise

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:17 ,  Issue: 4 )