Title :
A transformer-based current-reuse QVCO with a capacitor coupling technique in 180 nm CMOS
Author :
Ikeda, Shoji ; Kamimura, Taeko ; Sang-yeop Lee ; Ito, H. ; Ishihara, Noboru ; Masu, Kazuya
Author_Institution :
Solutions Res. Lab., Tokyo Inst. of Technol., Yokohama, Japan
Abstract :
This paper proposes a low-power and low phase-noise current-reuse quadrature VCO using a combination of capacitor coupling and transformer feedback technique. Compared with conventional active coupled QVCO, the proposed QVCO can achieve a low phase noise characteristics with low power consumption. The proposed QVCO was fabricated in 180 nm CMOS process technology and showed a 1 MHz offset phase noise of -127 dBc/Hz at 3.97 GHz. The power consumption was 6.26 mW with 1.0 V supply voltage and a figure of merit (FOM) of the proposed QVCO was -191 dBc/Hz.
Keywords :
CMOS analogue integrated circuits; capacitors; circuit feedback; low-power electronics; microwave integrated circuits; microwave oscillators; transformers; voltage-controlled oscillators; CMOS process technology; FOM; capacitor coupling technique; current-reuse QVCO; figure of merit; frequency 3.97 GHz; low phase noise characteristics; low power consumption; power 6.26 mW; quadrature voltage controlled oscillator; size 180 nm; transformer feedback technique; voltage 1 V; CMOS integrated circuits; Capacitors; Couplings; Equations; Inductors; Phase noise; Voltage-controlled oscillators;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2013 European
Conference_Location :
Nuremberg
