Title :
A low power consumption, low phase noise, and wide tuning range LC VCO with ACC
Author :
Qi, Xiaodong ; Li, Zhiqun
Author_Institution :
Inst. of RF & OE ICs, Southeast Univ., Nanjing, China
Abstract :
A 4.8GHz LC voltage controlled oscillator (VCO) for WSN Applications is designed based on TSMC 0.18 μm RF CMOS process. The VCO adopts complementary differential negative resistance structure with switch resistor biasing which achieves good phase noise performance and realizing low power consumption. The 3-bit switch capacitor array provides wide tuning range and the 6-bit switch resistors array provides varied biasing current by auto current calibration (ACC) circuit. With a 1.8V supply voltage, the post-simulated result achieves 27.7% tuning range that can compensate the frequency deviation due to process corners. The post simulated phase noise is -119dBc/Hz@1MHz at frequency of 2.44GHz. The operating current of the VCO core is from 0.4mA to 3.3mA. Finally, the chip size of the VCO core is 0.3mm2 and the whole chip size is 0.8×1.2mm2 with testing buffer and pads.
Keywords :
CMOS analogue integrated circuits; LC circuits; MMIC oscillators; field effect MMIC; phase noise; voltage-controlled oscillators; wireless sensor networks; 3-bit switch capacitor array; 6-bit switch resistors array; ACC circuit; LC VCO; LC voltage controlled oscillator; TSMC RF CMOS process; WSN applications; auto current calibration; complementary differential negative resistance structure; current 0.4 mA to 3.3 mA; frequency 2.44 GHz; frequency 4.8 GHz; phase noise; power consumption; size 0.18 mum; switch resistor biasing; tuning range; voltage 1.8 V; Arrays; Phase noise; Power demand; Switches; Tuning; Voltage-controlled oscillators; LC VCO; auto current calibration; low power; phase noise; wide tuning range;
Conference_Titel :
Communication Technology (ICCT), 2011 IEEE 13th International Conference on
Conference_Location :
Jinan
Print_ISBN :
978-1-61284-306-3
DOI :
10.1109/ICCT.2011.6158045