Community
Chris Holdenried - Alumni
Ph.D. Project
For my Ph.D. thesis, I designed components for an optical single
sideband system. My thesis is entitled A Logarithmic Amplifier and Hilbert Transformer for Optical Single Sideband. This system is unique because it operates at baseband,
similar to existing 2.5 Gb/s and 10 Gb/s systems, except it is single
sideband and envelope detection may be used at the receiver. Hence, although
the transmitter is different than existing systems, the receiver front
end still consists of a photodiode followed by a transimpedance and post amplifier.
The components that I designed are a logarithmic amplifier and a Hilbert
transformer. My test work took place at TRLabs Calgary, which is a communications
laboratory with which I was affiliated. I was part of the RFIC group under the supervision of Dr. Haslett. I went to Snowbush Microelectronics in February 2005.
Education
| Bachelor of Science |
University of Calgary |
08/95-04/00 |
| Ph.D. |
University of Calgary |
05/00-expected 01/05 |
Relevant Experience
| RF Engineering Research Assistant |
05/98-08/99 |
| TRLabs |
Calgary,Alberta |
- Performed measurement-based modeling of power GaAs MESFET, Si LDMOS,
and BJT semiconductors.
- Extracted modeling parameters for LMCS 30 GHz urban radio channels.
- Tested power amplifiers using robotic impedance tuning (load-pull)
system.
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Publications
Many of these publications may be downloaded here.
Papers in Refereed Periodicals
C.D. Holdenried, J.W. Haslett, and B. Davies,
"A Fully Integrated 10 Gb/s Hilbert Transformer for Optical Single Sideband," To appear in the May issue of IEEE
Microwave and Wireless Technology Letters.
C.D. Holdenried, J.W. Haslett, and M.W. Lynch,
"Analysis and Design of HBT Cherry-Hooper
Amplifiers with Emitter Follower Feedback for Optical Communications," IEEE
J.Solid-State Circuits, Vol. 39, No. 11, Nov. 2004, pp. 1959-1967.
C.D. Holdenried, J.W. Haslett, J.G. McRory, R.D. Beards, and A.J. Bergsma, "A DC-4 GHz true logarithmic amplifier: theory and implementation," IEEE
J.Solid-State Circuits, Vol. 37, No. 10, Oct. 2002, pp. 1290-1299.
Patents
C.D. Holdenried, J.W. Haslett, J.G. McRory, and R.J. Davies, "Logarithmic Amplifiers" US Patent 6,734,712, issued May 2004.
Papers in Refereed Conferences
C.D. Holdenried and J.W. Haslett,
"A DC-6 GHz, 50 dB Dynamic Range, SiGe HBT True Logarithmic Amplifier," IEEE International Symposium on Circuits and Systems, Vancouver, Canada, May 23-26, 2004.
C.D. Holdenried, M.W. Lynch. and J.W. Haslett,
"Modified CMOS Cherry-Hooper Amplifiers with Source Follower Feedback in 0.35 um Technology," IEEE European Solid State Circuits Conference, Estoril, Portugal, Sep. 16-18, 2003, pp. 553-556.
M.W. Lynch, C.D. Holdenried, amd J.W. Haslett, "A 17 GHz direct down-conversion mixer in a 47-GHz SiGe process," IEEE Radio Frequency Integrated Circuits (RFIC) Symposium, June 8-10, 2003, Philadelphia, USA, pp. 461-464.
C.D. Holdenried and J.W. Haslett, "Two baseband logarithmic amplifiers using parallel feedback amplifier cells," Proc. of Wireless 2002, Calgary, Alberta, July 2002, pp. 181-189.
C. Holdenried, J.W. Haslett, J. McRory, R. Davies, D. Beards, and A.J. Bergsma, "A DC-4 GHz logarithmic amplifier with fiber optic applications,"
Proc. of Wireless 2001, Calgary, Alberta, pp. 216-225, July 2001.
Papers in Non-Refereed Conferences
C.D. Holdenried, J.W. Haslett, and B. Davies, "A 10 Gb/s Integrated Hilbert Transformer," TRLabs Technology Forum 2004, Saskatoon, Saskatchewan, October, 2004.
C.D. Holdenried, J.W. Haslett, and B. Davies, "A Fully Integrated 10 Gb/s Hilbert Transformer," CMC Texpo 2004, Ottawa, Ontario, September 30, 2004.
C.D. Holdenried and J.W. Haslett, "A Limiting Amplifier Using Modified Cherry-Hooper Stages in 0.18 um CMOS," CMC Texpo 2003, Montreal, Quebec, poster presentation and demo, June 18, 2003.
C.D. Holdenried, J.W. Haslett, and R. Davies, " A 10 Gb/s Logarithmic Amplifier for Optical Single Sideband,"
TRLabs Technology Forum, Edmonton, Alberta, October 2002.
C.D. Holdenried and J.W. Haslett, "Two baseband logarithmic amplifiers using parallel feedback amplifier cells," CMC Texpo 2002, Ottawa, Ontario, June 18, 2002.
C.D. Holdenried, J.W. Haslett, J. McRory, R. Davies, D. Beards, and A.J. Bergsma, " A DC-4 GHz logarithmic amplifier for single-sideband optics,"
TRLabs Technology Forum, Winnipeg, Manitoba, October 2001.
Awards
Analog Devices Inc. Outstanding Student IC Designer Award, Febraury 2005.
IEEE Microwave and Theory Techniques Society Graduate Fellowship, June 2003.
Faculty of Graduate Studies Research Innovation Award, Jan. 15, 2003.
Canadian Microelectronics Corporation Cad/Componenware Award, June 2002.
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