[Who is RSN?] Sekhar Narayanaswami's Home Page

[Sekhar Playing The Guitar]

Welcome to Sekhar Narayanaswami's Home Page. I graduated with my Ph.D. from the Electrical Engineering & Computer Sciences (EECS) Department at The University of California, Berkeley, in December 2001. My advisor was Professor Paul R. Gray, and I worked on trying to implement RF Power Amplifiers in standard CMOS technologies. I designed and implemented a a 1.7 W, 1.75 GHz Power Amplifier in a standard CMOS process, to be used in a transceiver for the DCS 1800 system. The prototype delivered more than 1W of output power into a 50 ohm load (the underperformance was due to lower-than-expected Qs for the on-chip spiral inductors). Furthermore, I investigated a design methodology for Integrated Class C PAs in standard CMOS technologies, using Fourier Series analysis of the Class C waveforms in order to come up with a simple, first-order method that would enable designers to predict the efficiency and other metrics of a PA without resorting to complex circuit simulators like SPICE or SpectreRF. A copy of my PhD Thesis is available below.

The final 2 years of my time at UC Berkeley, I was associated with the Berkeley Wireless Research Center (BWRC), which gathers together much of the work going on at UC Berkeley in the area of wireless communications. It includes several faculty members as well as several member companies from industry who provide some fantastic support to all the students there. The BWRC web page is well worth visiting if you have an interest in the research in wireless communications going on at UC Berkeley.

I received my MS in EE from UC Berkeley in May 1998. A copy of my Master's Report can be obtained below, or an official copy can be obtained from the Electronics Research Laboratory (ERL Memo # M98/52).

I also did my undergraduate work at UC Berkeley, graduating with my Bachelor of Science Degree in EECS in 1993.

In 1996, I spent six months (2/96-8/96) doing a co-op at Texas Instruments in Dallas, Texas. I spent time in their research division, and had a great time both at TI and in Dallas.

I currently work for Aeluros, an early stage start-up developing integrated circuits for broadband communications.

Theses

  • R. S. Narayanaswami, RF CMOS Class C Power Amplifiers for Wireless Communications (PDF), Ph.D. Thesis, December 2001.

  • R. S. Narayanaswami, The Design of a 1.9GHz 250mW CMOS Power Amplifier for DECT (PDF, PS), Master's Report, May 1998.

    • Papers

  • J.Weldon, J.Rudell, L.Lin, R.Narayanswami, M.Otsuka, S.Dedieu, L.Tee, K.Tsai, C.Lee and P.Gray, "A 1.75-GHz Highly-Integrated Narrow-Band CMOS Transmitter with Harmonic-Rejection Mixers," International Solid-State Circuits Conference, Paper 10.4, Feb. 6th, 2001. Lewis Winner Outstanding Paper Award Recipient

  • R. S. Narayanaswami, "RF CMOS Class C Power Amplifiers for Portable Wireless Communications," Qualifying Exam Proposal, Dec. 1998.

  • 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. Invited Paper

  • R. S. Narayanaswami, D. Yee, Noise Models for MOSFETs in Saturation (PDF File, HTML File, Postscript File), EECS 231 Class Project, May 1997.

  • R. S. Narayanaswami, A Low-Noise, Wideband Trans-Impedance Amplifier (PDF, Postscript), EECS 240 Class Project, Dec. 1993.

  • R. S. Narayanaswami, K. Banerjee, Reliable, High Performance I/O Buffer Design For Multiple Power Supply Systems, (PDF Version, PS Version, HTML Version), EE241 Class Project, Spring 1997.

  • R.S. Narayanaswami, An Analysis of Direct-Sequence and Frequency Hopped Spread Spectrum Systems (PDF, Postscript), EECS 224 Term Paper, May 1994.

    • Slides

  • J. Weldon, J. Rudell, L. Lin, R. S. Narayanaswami, M.Otsuka, S.Dedieu, L.Tee, K.Tsai, C.Lee and P.Gray, "A 1.75-GHz Highly-Integrated Narrow-Band CMOS Transmitter with Harmonic-Rejection Mixers,"(HTML, IE required, PDF, Acrobat 4.0 required) International Solid-State Circuits Conference, Paper 10.4, Feb. 2001.

  • R. S. Narayanaswami, "RF CMOS Class C Power Amplifiers for Portable Wireless Communications," (PS version) Qualifying Exam Presentation, Dec. 7th, 1998.

  • 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 ," Presentation for the 1998 International Symposium on Low Power Electronics, Monterey, California, Aug. 11th, 1998 (GIF/MIF/PS/PDF). Invited Paper

  • R. Sekhar Narayanaswami, A 1.9GHZ CMOS Class C PA Design Review, July 1997.

  • R. Sekhar Narayanaswami, "RF CMOS Transmitters and Power Amplifiers" (GIF/MIF/PS), Infopad Retreat, Jan 1997.

  • R. Sekhar Narayanaswami & Dennis Yee, Noise Models for MOSFETs in Saturation, EECS 231 Project Presentation.

  • R. Sekhar Narayanaswami & Kaustav Banerjee, Reliable High Performance Buffer Design for Multiple Power Supply Systems (PDF File, HTML Version, Postscript Version), EECS 241 Project Presentation



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    R. Sekhar Narayanaswami, Ph.D.
    Email: rsn "at" eecs "dot" berkeley "dot" edu
    Last modified: Wed Jan 8 17:18:48 PST 2003