Design of automatic frequency calibration Used in the PLL frequency synthesizer for 2.4GHz WSN

Author

Fan Xiangning ; Tang Haihong ; Yu Lu ; Li Bin

Author_Institution

Sch. of Inf. Sci. & Eng., Southeast Univ., Nanjing, China

fYear

2012

fDate

18-20 Sept. 2012

Firstpage

1

Lastpage

4

Abstract

In this paper, an open looped fast automatic frequency calibration (AFC) unit used in 2.4GHz CMOS integer-N phase-locked loop (PLL) frequency synthesizer (FS) for IEEE802.15.4/ZigBee wireless sensor networks (WSN) is presented. The calibration method accomplishes efficient search for an optimum discrete tuning curve of the voltage controlled oscillator (VCO) among a group of frequency sub-bands. The pre-simulation, layout design and post-simulation results are given. Post simulation results show that the AFC performs well.

Keywords

CMOS integrated circuits; UHF integrated circuits; UHF oscillators; Zigbee; calibration; frequency synthesizers; phase locked loops; voltage-controlled oscillators; wireless sensor networks; AFC unit; CMOS integer-N phase-locked loop frequency synthesizer; IEEE802.15.4; PLL frequency synthesizer; VCO; WSN; ZigBee wireless sensor networks; automatic frequency calibration method; frequency 2.4 GHz; frequency subbands; layout design; open looped fast automatic frequency calibration unit; optimum discrete tuning curve; voltage controlled oscillator; Calibration; Frequency synthesizers; Phase locked loops; Tuning; Voltage-controlled oscillators; Wireless sensor networks; CMOS; automatic frequency calibration; frequency synthesizer; wireless sensor networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Workshop Series on Millimeter Wave Wireless Technology and Applications (IMWS), 2012 IEEE MTT-S International

Conference_Location

Nanjing

Print_ISBN

978-1-4673-0901-1

Electronic_ISBN

978-1-4673-0903-5

Type

conf

DOI

10.1109/IMWS2.2012.6338182

Filename

6338182