Title :
A study on wide-band frequency synthesizer for advanced wireless communication
Author :
Kim, Nakyoon ; Moon, Yong
Author_Institution :
Dept. Electron. Eng., Soongsil Univ., Seoul, South Korea
Abstract :
A wide-band frequency synthesizer for advanced wireless communication including LTE(Long Term Evolution) is proposed. Inductor switching techniques and 4-bit capacitor bank are used in LC-VCO for wide frequency band, and varactor bank in LC-VCO is designed for low VCO-gain variation and uniform VCO frequency interval. Additionally, the output frequency can be selected by output-selection bits in the prescaler for choosing needed frequency. The proposed frequency synthesizer is designed by 0.18 μm CMOS process and occupies 0.21 mm2. The simulated phase noise of VCO output is below -105dBc/Hz at 1MHz offset. The frequency synthesizer consumes 32.4 mWby 1.8Vsupply.
Keywords :
CMOS integrated circuits; Long Term Evolution; broadband networks; frequency synthesizers; phase noise; radiocommunication; voltage-controlled oscillators; 4-bit capacitor bank; CMOS process; LC-VCO; LTE; Long Term Evolution; VCO output; advanced wireless communication; frequency 1 MHz; inductor switching techniques; low VCO-gain variation; output frequency; output-selection bits; power 32.4 mW; simulated phase noise; size 0.18 mum; uniform VCO frequency interval; varactor bank; voltage 1.8 V; wide frequency band; wide-band frequency synthesizer; LTE(Long Term Evolution); VCO; Wide-band frequency synthesizer; phase locked loop(PLL);
Conference_Titel :
SoC Design Conference (ISOCC), 2011 International
Conference_Location :
Jeju
Print_ISBN :
978-1-4577-0709-4
Electronic_ISBN :
978-1-4577-0710-0
DOI :
10.1109/ISOCC.2011.6138751
