A 5-GHz frequency synthesizer with AFC for low IF ZigBee transceiver applications

Author

Li, Zhiqun ; Jiang, Yawei ; Shu, Haiyong ; Hou, Ningbing

Author_Institution

Inst. of RF- & OE-ICs, Southeast Univ., Nanjing, China

fYear

2011

fDate

26-29 June 2011

Firstpage

530

Lastpage

533

Abstract

A fully integrated integer-N frequency synthesizer has been designed and implemented in 0.18μm RF CMOS technology for low intermediate frequency (IF) ZigBee transceiver application. It incorporates an automatic frequency calibration (AFC) loop to extend frequency tuning range. In-phase and quadrature (IQ) signals are generated by a divide-by-two frequency divider at the output of PLL. It consumes 11mA at 1.8V. The measured phase noise is -118dBc/Hz and -135dBc/Hz at the offset of 1MHz and 3MHz from 2.405GHz carrier respectively. The measured reference-spur at 2MHz offset from 2.405GHz carrier is -64dBc.

Keywords

CMOS integrated circuits; Zigbee; calibration; frequency synthesizers; phase locked loops; phase noise; radio transceivers; AFC; IQ signal; PLL; RF CMOS technology; automatic frequency calibration; current 11 mA; frequency 5 GHz; frequency synthesizer; frequency tuning range; low IF ZigBee transceiver application; phase noise; size 0.18 mum; voltage 1.8 V; Frequency control; Frequency conversion; Frequency synthesizers; Phase locked loops; Phase noise; Radiation detectors; Voltage-controlled oscillators; Automatic frequency calibration; Phase-locked loop; Voltage controlled oscillator; ZigBee; phase noise;

fLanguage

English

Publisher

ieee

Conference_Titel

New Circuits and Systems Conference (NEWCAS), 2011 IEEE 9th International

Conference_Location

Bordeaux

Print_ISBN

978-1-61284-135-9

Type

conf

DOI

10.1109/NEWCAS.2011.5981336

Filename

5981336