Title :
Colpitts current-reused QVCO based on capacitor coupling
Author :
Lai, Hsing-Han ; Shen, I-Shing ; Jou, Christina F.
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
This paper presents a Colpitts current-reused quadrature voltage-controlled oscillator (QVCO) based on capacitor coupling in TSMC 0.18um CMOS 1P6M process technology. Comparing to conventional parallel-coupled QVCO (P-QVCO), the proposed QVCO achieves a better phase noise and phase accuracy. The proposed QVCO operates from 4.57GHz to 5.02GHz. The measured phase noise at 1MHz offset frequency is -119 dBc/Hz and the measured phase error of quadrature signals are 5° at 5GHz. With 1.8V power supply, the power consumption is 8.46mW. The figure of merit (FOM) of proposed QVCO is 183.7 dBc/Hz. The die area is 1×0.78mm2.
Keywords :
CMOS integrated circuits; integrated circuit design; phase noise; voltage-controlled oscillators; CMOS 1P6M process technology; Colpitts current-reused QVCO; capacitor coupling; figure of merit; frequency 1 MHz; frequency 4.57 GHz to 5.02 GHz; phase accuracy; phase noise; power 8.46 mW; quadrature signals phase error; quadrature voltage-controlled oscillator; voltage 1.8 V; wavelength 0.18 mum; CMOS integrated circuits; Capacitors; Couplings; Current measurement; Phase noise; Transistors; Voltage-controlled oscillators; CMOS; Colpitts; P-QVCO; capacitor coupling; current-reused VCO;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
