IEEE Santa Clara Valley Chapter
November 26, 2002
Our speaker was Dr. David Su, and the topic of his presentation was
“CMOS RF Power Amplifiers: Nonlinear, Linear, Linearized”
The power amplifier (PA) is an integral part of any wireless communications system. Using CMOS technology for power amplification is desirable because a CMOS PA can be combined with other radio functions in a cost-effective integrated transceiver. However implementing efficient power amplifiers in a main-stream digital CMOS technology remains a major challenge. This talk starts with a brief tutorial on CMOS power amplifier design. In addition, three PA design case studies are presented: a nonlinear 32dBm, 800MHz PA with 42% power-added efficiency; a linear 18dBm, 5GHz PA for IEEE 802.11a wireless LAN; and a linearization IC for North American digital cellular that improve efficiency from 36 to 49% using envelope elimination and restoration.
Biography: David Su joined Atheros in February 1999, where he is currently the director of analog/RF IC design. He spent 10 years at Hewlett-Packard Company (IC Business Division and HP Labs) designing CMOS mixed-signal, analog, and RF ICs. He has also been a consulting assistant professor at Stanford University since 1997. Dr. Su holds a Ph.D. in electrical engineering from Stanford University as well as M.E. and B.S.E.E. degrees from the University of Tennessee at Knoxville.
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