[1] Jiang Yawei, Li Zhiqun, Shu Haiyong, Hou Ningbing, et al. A 5-GHz frequency synthesizer with constant bandwidthfor low IF ZigBee transceiver applications [J]. Journal of Southeast University (English Edition), 2010, 26 (1): 6-10. [doi:10.3969/j.issn.1003-7985.2010.01002]

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A 5-GHz frequency synthesizer with constant bandwidthfor low IF ZigBee transceiver applications()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

26

Issue:

2010 1

Page:

6-10

Research Field:

Electronic Science and Engineering

Publishing date:

2010-03-30

Info

Title:

A 5-GHz frequency synthesizer with constant bandwidthfor low IF ZigBee transceiver applications

Author(s):

Jiang Yawei;  Li Zhiqun;  Shu Haiyong;  Hou Ningbing

Institute of RF- & OE-ICs, Southeast University, Nanjing 210096, China

Keywords:

phase-locked loop;  phase noise;  auto frequency calibration;  ZigBee;  voltage controlled oscillator

PACS:

TN742;TN752

DOI:

10.3969/j.issn.1003-7985.2010.01002

Abstract:

A fully integrated integer-N frequency synthesizer is implemented.The synthesizer is designed for low intermediate frequency(IF)ZigBee transceiver applications.Techniques used to make the loop bandwidth constant across the whole output frequency range of the voltage controlled oscillator(VCO)are adopted to maintain phase noise optimization and loop stability.In-phase and quadrature(IQ)signals are generated by a 1/2 frequency divider at the output of the VCO.The synthesizer is fabricated in 0.18 μm radio frequency(RF)complementary metal oxide semiconductor transistor(CMOS)technology.The chip area is 1.7 mm².The synthesizer is measured on wafer.It consumes totally 28.8 mW excluding output buffers from a supply voltage of 1.8 V.The measured phase noise is -110 and -122 dBc/Hz at the offset of 1 and 3 MHz from a 2.405 GHz carrier, respectively.The measured reference spur at a 2 MHz offset from a 2.405 GHz carrier is-48.2 dBc.The measured setting time of the synthesizer is about 160 μs.

References:

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Memo

Memo:

Biographies: Jiang Yawei(1980—), male, graduate;Li Zhiqun(corresponding author), male, doctor, professor, zhiqunli@seu.edu.cn.
Foundation items: The National High Technology Research and Development Program of China(863 Program)(No.2007AA01Z2A7), the Science and Technology Program of Zhejiang Province(No.2008C16017).
Citation: Jiang Yawei, Li Zhiqun, Shu Haiyong, et al.A 5-GHz frequency synthesizer with constant bandwidth for low IF ZigBee transceiver applications[J].Journal of Southeast University(English Edition), 2010, 26(1):6-10.

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