Title :
A constant-current-controlled class-C VCO using a self-adjusting replica biasing scheme
Author :
Siriburanon, Teerachot ; Wei Deng ; Okada, Kenichi ; Matsuzawa, Akira
Author_Institution :
Dept. of Phys. Electron., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
This paper proposes a constant-current-controlled class-C VCO using a self-adjusting replica biasing scheme. The proposed class-C VCO can maintain constant current which is more robust over a variation of low gate bias of a cross-coupled pair comparing to a traditional current mirror. The proposed VCO is implemented in a 0.18-μm CMOS process. The measured phase noise is -121.3dBc/Hz at 1MHz offset with a power dissipation of 4.8mW while oscillating at the frequency of 4.9GHz. The figure-of-merit is approximately -189 dBc/Hz.
Keywords :
CMOS integrated circuits; phase noise; replica techniques; voltage-controlled oscillators; CMOS process; constant-current-controlled class-C VCO; cross-coupled pair; figure-of-merit; frequency 4.9 GHz; low gate bias; phase noise measurement; power 4.8 mW; power dissipation; self-adjusting replica biasing scheme; size 0.18 mum; CMOS integrated circuits; Logic gates; Mirrors; Phase noise; Robustness; Voltage-controlled oscillators; CMOS; Class-C; VCO; constant-current-control: PVT; start-up;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2013 European
Conference_Location :
Nuremberg
