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

fYear

2011

fDate

17-18 Nov. 2011

Firstpage

227

Lastpage

230

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);

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISOCC.2011.6138751

Filename

6138751