[1] Guo Xuefeng, Wang Zhigong, Li Zhiqun, Tang Lu, et al. Wideband CMOS LC VCO design and phase noise analysis [J]. Journal of Southeast University (English Edition), 2008, 24 (4): 433-436. [doi:10.3969/j.issn.1003-7985.2008.04.008]

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Wideband CMOS LC VCO design and phase noise analysis()

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

Volumn:

24

Issue:

2008 4

Page:

433-436

Research Field:

Electronic Science and Engineering

Publishing date:

2008-12-30

Info

Title:

Wideband CMOS LC VCO design and phase noise analysis

Author(s):

Guo Xuefeng;  Wang Zhigong;  Li Zhiqun;  Tang Lu

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

Keywords:

voltage controlled oscillator(VCO);  wideband;  phase noise

PACS:

TN75

DOI:

10.3969/j.issn.1003-7985.2008.04.008

Abstract:

A wideband LC cross-coupled voltage controlled oscillator(VCO)is designed and realized with standard 0.18 μm complementary metal-oxide-semiconductor(CMOS)technology.Band switching capacitors are adopted to extend the frequency tuning range, and the phase noise is optimized in the design procedure.The functional relationships between the phase noise and the transistors’ width-length ratios are deduced by a linear time variant(LTV)model.The theoretical optimized parameter value ranges are determined.To simplify the calculation, the working region is split into several sub-ranges according to transistor working conditions.Thus, a lot of integrations are avoided, and the phase noise function upon the design variables can be expressed as simple proportion formats.Test results show that the DC current is 8.8 mA under a voltage supply of 1.8 V; the frequency range is 1.17 to 1.90 GHz, and the phase noise reaches -83 dBc/Hz at a 10 kHz offset from the carrier.The chip size is 1.2 mm×0.9 mm.

References:

[1] Li Zhiqun, Wang Zhigong, Zhang Liguo, et al.Low phase noise LC VCO design in CMOS technology [J].Journal of Southeast University:English Edition, 2004, 20(1):6-9.
[2] Berny A D, Niknejad A M, Meyer R G.A 1.8-GHz LC VCO with 1.3-GHz tuning range and digital amplitude calibration [J].IEEE Journal on Solid-State Circuits, 2005, 40(4):909-917.
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[4] Fong N H W, Plouchart J O, Zamdmer N, et al.Design of wide-band CMOS VCO for multiband wireless LAN applications [J].IEEE Journal on Solid-State Circuits, 2003, 38(8):1333-1342.
[5] Song Y Y, Sun W, Tang S L, et al.A wideband CMOS VCO for digital TV tuners [J].Research & Progress of SSE Solid, 2007, 27(1):79-94.
[6] Hegazi E, Sjoland H, Abidi A A.A filtering technique to lower LC oscillator phase noise [J].IEEE Journal on Solid-State Circuits, 2001, 36(12):1921-1930.
[7] Kral A, Behbahani F, Abidi A A.RF-CMOS oscillators with switched tuning [C]//IEEE Custom Integrated Circuits Conference.Santa Clara, CA, USA, 1998:555-558.
[8] Hajimiri A, Lee T H.Design issues in CMOS differential LC oscillators [J].IEEE Journal on Solid-State Circuits, 1999, 34(5):717-724.
[9] Andreani P, Fard A.More on the 1/f² phase noise performance of CMOS differential-pair LC-tank oscillators [J].IEEE Journal on Solid-State Circuits, 2006, 41(12):2703-2712.
[10] Hajimiri A, Lee T H.A general theory of phase noise in electrical oscillators [J].IEEE Journal on Solid-State Circuits, 1998, 33(2):179-194.

Memo

Memo:

Biographies: Guo Xuefeng(1978—), male, graduate;Wang Zhigong(corresponding author), male, doctor, professor, zgwang@seu.edu.cn.
Citation: Guo Xuefeng, Wang Zhigong, Li Zhiqun, et al.Wideband CMOS LC VCO design and phase noise analysis[J].Journal of Southeast University(English Edition), 2008, 24(4):433-436.

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