George's Home Page

"Stand at the crossroads and look; ask for the ancient paths, ask where the good way is, and walk in it, and you will find rest for your souls." -- Jeremiah 6:16

My current research is on Monolithic CMOS Frequency Synthesizer for Cellular Applications. A short abstract can be found in the ILP 1999 Research Summary. My advisor is Prof. Paul R. Gray in the EECS department at the University of California at Berkeley.

My Masters ADC project was based on the work published below and scaled to 0.6um with some design changes. The performance is 10b 40MS/s 28mW. See below for related papers and presentation slides.

  • Resume, "My resume is here"(PDF)
  • I was a course consultant for NTU IC776ca.

    Papers

    Acrobat PDF flies now available for all files!!!
  • George Chien and Paul R. Gray, " A 900-MHz Local Oscillator using a DLL-based Frequency Multiplier Technique for PCS Applications," (PDF) Digest of Technical Papers, International Solid-State Circuits Conference , San Francisco, CA. Feb. 8, 2000
  • J.C. Rudell, J.J. Ou, R. S. Narayanaswami, G. Chien, J.A. Weldon, L. Lin, K.C. Tsai, L. Tee, K. Khoo, D. Au, T. Robinson, D. Gerna, M. Otsuka, and P. R. Gray, " Recent Developments in High Integration Multi-Standard CMOS Transceivers for Personal Communication Systems ," (PDF) Invited paper at the 1998 International Symposium on Low Power Electronics, Monterey, California
  • Jacques C. Rudell, Jia-Jiunn Ou, Thomas Cho, George Chien, Francesco Brianti, Jeffrey A. Weldon and Paul R. Gray, " A 1.9GHz Wide-Band IF Double Conversion CMOS Receiver for Cordless Telephone Applications," (PDF) Journal of Solid State Circuits, December, 1997
  • J.Rudell, JJ. Ou, T.Cho, G.Chien, F.Brianti, J.Weldon, and P.Gray, " A 1.9GHz Wide-Band IF Double Conversion CMOS Integrated Receiver for Cordless Telephone Applications," (GIF/MIF/PDF) Digest of Tehnical Papers, International Solid-State Circuits Conference, San Francisco, CA. Feb. 8, 1997
  • Thomas Cho, George Chien, Francesco Brianti and Prof. Paul Gray, "A Power-Optimized CMOS Baseband Channel Filter and ADC for Cordless Applications" (GIF/MIF/PDF) VLSI Circuit Conference Digest 96, June 1996

    • Slides

  • George Chien and Paul R. Gray, "A 900-MHz Local Oscillator using a DLL-based Frequency Multiplier Technique for PCS Applications," (PDF) Presentation slides for 2000 International Solid-State Circuit Conference, Feb. 8, 2000

  • " Recent Developments in High Integration Multi-Standard CMOS Transceivers for Personal Communication Systems ," J.C. Rudell, J.J. Ou, R. S. Narayanaswami, G. Chien, J.A. Weldon, L. Lin, K.C. Tsai, L. Tee, K. Khoo, D. Au, T. Robinson, D. Gerna, M. Otsuka, and P. R. Gray. Presentation for the 1998 International Symposium on Low Power Electronics, Monterey, California, Aug. 11th, 1998 (GIF/MIF/PS/PDF). Invited Paper

  • George Chien and Prof. Paul Gray, "Delay-Based Monolithic CMOS Frequency Synthesizer for Portable Wireless Applications" (PDF) Qualifying Exam, May 20, 1998

  • George Chien and Prof. Paul Gray, "Monolithic CMOS Frequency Synthesizer for Cellular Applications" (GIF/MIF/PS/PDF) Industry Liaison Program 1997, March 12-13

  • J.Rudell, JJ. Ou, T.Cho, G. Chien, F.Brianti, J.Weldon, and P. Gray A 1.9GHz Wide-Band IF Double Conversion CMOS Integrated Receiver for Cordless Telephone Applications (GIF/MIF/PS/PDF) ," International Solid-State Circuits Conference Feb. 8th, 1997

  • Thomas Cho, George Chien, Francesco Brianti and Prof. Paul Gray, "A Power-Optimized CMOS Baseband Channel Filter and ADC for Cordless Applications" (GIF/MIF/PS/PDF) VLSI Circuit Conference 96, June 1996

  • Thomas Cho, George Chien, Francesco Brianti and Prof. Paul Gray, "A Power-Optimized CMOS Baseband Channel Filter and ADC for Cordless Applications" (GIF/MIF/PS/PDF) Infopad Summer Retreat 96, June 1996

  • Thomas Cho, George Chien, Francesco Brianti and Prof. Paul Gray, "Baseband Filter/Gain + ADC," (GIF/MIF/PS/PDF) Infopad Winter Retreat 96, Jan 1996

    • Thesis

  • George Chien, "High-Speed, Low-Power, Low Voltage Pipelined Analog-to-Digital Converter," (PDF) Masters Thesis, May, 1996

  • George Chien, "Low-Noise Local Oscillator Design Techniques using a DLL-based Frequency Multiplier for Wireless Applications," (PDF) Ph.D. Dissertation Jan., 2000

    • Class Project

  • George Chien, "A Floating-Gate Programmable MOSFET using standard double poly CMOS process," (GIF/MIF/PS)EECS231 Class Project Slides, May 1995.

  • George Chien, "Programmable double-poly MOSFET," (HTML/MIF/PS)EE231 Class Project Paper, May 1995.

  • G. Chien, R. Galicia, M. Wan, "A Study of Programmable ASIC for DSP Applications," (GIF/MIF/PS) EE225C Report, May 1996.

  • G. Chien, R. Galicia, M. Wan, "A Study of Programmable ASIC for DSP Applications," (GIF/MIF/PS) EE225C Class Presentation, May 1996.

    • * More about me

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  • Resume, "My resume is here"(PDF)
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    George Chien

    University of California
    211-34 Cory Hall #1772
    Berkeley, CA 94720-1772

    Email: gchien@eecs.berkeley.edu
    Office: (510) 643-6147
    FAX: (510) 642-2739

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    Last modified: (Mon) August 24 1998