B. E. E. E. (Electrical Engineering) 1969 Vanderbilt Univ.Honors:
M. S. E. E. (Electrical Engineering) 1970 Cal Inst. of Tech.
1959 Amateur Radio Operator - K4OAP (General class at age 12)Hobbies and Activities:
1962 FCC Second Class Commercial Radiotelephone License
1963 FCC First Class Commercial Radiotelephone License
1969 Eta Kappa Nu, Engineering Honor Society
1969 Tau Beta Pi, Engineering Honor Society
1983 Distinguished Member of Technical Staff, AT&T Bell Labs
1989 AT&T Bell Labs, Inventor's Hall of Fame
1990 Senior Member of IEEE
1995 Co-General Chair, EOS/ESD Symposium held in Phoenix, AZ
1998 IEEE Electromagnetic Compatibility Society Board of Directors
2001 (to present) Teach courses in the Department of Continuing Education at Oxford University
2011 Narte Certified Electromagnetic Compatibility Master Design Engineer
Amateur Radio Operator, K4OAPEmployment History:
Teaching courses at the Department of Continuing Education at Oxford University. My current courses (taught once or twice per year) are:
April 2000-present:I am currently an independent consultant specializing in high frequency measurements, circuit/system design and verification, switching power supply noise and specifications, EMC, and immunity to transient noise. I teach laboratory demonstration based courses on device, circuit, and system design, as well as high frequency measurement techniques as well as offer consulting services to solve difficult design problems in a wide range of electronic equipment. Currently, I am based in Boulder City, NV where I hold public and private seminars for my US clients.1996-April 2000: Manager EMC Development and Test, Auspex Systems, a maker of high performance network servers in Santa Clara, CA
I was responsible for insuring that Auspex products meet international standards for EMC, both emissions and immunity, and safety. In addition, the group that I headed worked to insure the robustness of Auspex designs.1970-1996: Member/Distinguished Member of Technical Staff of AT&T Bell Labs, Holmdel and Middletown, NJ
During my time at Auspex, no product introduction was ever delayed by an EMC or safety agency issue. In some cases, I helped suppliers design their products, especially switching power supplies.
Standards committee participation at Auspex includes:
- ANSI C63 EMC
- Subcommittee 1, EMC Measurements
- Subcommittee 3, International
- ESD subcommittee
- ESD Association Working Group 14, ESD Simulators
- T1E1.7, Telephone Central Office Protection
- IEC TC77B WG9 TC77B is concerned with high frequency immunity of electronic equipment. WG9 is rewriting the current standard IEC 1000-4-2 on electrostatic discharge testing.My work with Bell Labs encompassed linear circuit design, telephone transmission theory, digital design, digital and analog ASIC design, pulsed electromagnetic interference including electrostatic discharge (ESD), and electromagnetic compatibility (EMC). More specifically, I designed the time division bus structure and many of the interfaces to the telephone network in the Definity Communications System (TM), a number of linear and digital integrated circuits, and analog transmission plans and circuitry for a number of other AT&T products. I have been granted over fifteen patents.
I have directed EMC and ESD studies over the years that have resulted in novel, low cost solutions. Projects have ranged from ESD interference affecting manufacturing robots to problems resulting from radiated interference generated by loose pocket change.
My designs included improvements to unshielded twisted pair, UTP, interfaces for local area network equipment. These designs have helped UTP achieve performance equivalent to shielded systems in many cases.
I have participated in standards work for AT&T including (all current participation except as noted):
I had taught and consulted for many organizations throughout AT&T essentially as an internal consultant. My High Frequency Measurement Techniques Seminar was one of the most popular in-hours education courses offered at Bell Labs.
- TIA: TR41.9 committee on FCC Part 68 rules (previous participation)
- TIA: TR41.7 environmental committee (specifically, ESD requirements for terminal equipment)
- T1E1: Requirements for Telephone Central Office equipment and operator positions
- ESD 14.0: This body is currently generating a qualification test for ESD simulators to improve the repeatability of IEC 1000-4-2 (previously known as IEC 801-2) ESD testing of equipment. I participated in round-robin testing in New Jersey, California, Canada, and England on existing simulators using high bandwidth measurement techniques. I am Secretary of this body.
- ANSI (C63): This body is currently converting the ANSI ESD testing guide to a full standard.
- IEC TC77B WG3: This working group of the IEC is concerned with high frequency immunity including ESD and electrical fast transient (EFT) interference. I recently proposed a measurement method for evaluating coupling clamp performance for the IEC 1000-4-4 EFT test and performed round-robin testing on existing clamp designs in New Jersey and California.
1969-Summer Member of Technical Staff
Bell Labs Holmdel, NJDuring the summer before my graduate work, I designed circuitry and performed testing for the MJ/MK Mobile Radiotelephone System. One of my circuits helped to insure that a mobile radio would lock onto its local idle tone instead of the tone from a nearby city.
1969-Fall/Sp Transmitter Engineer (AM)
Radio Station WMAK Nashville, TNMy responsibilities included the operation of station's remote transmitter site and some maintenance.1968-Summer Electronic Technician
Bendix Avionics Ft. Lauderdale, FLWorking in the instrument pool, I was involved in the repair and calibration of test equipment. My specialty was repairing equipment that was considered beyond local capabilities to fix.1967-Fall Transmitter Engineer (AM)
Radio Station WWGM Nashville, TNI was responsible for operation of the remote transmitter.1967-Summer Electronic Technician
Bendix Avionics Ft. Lauderdale, FLWorking in the instrument pool, I was involved in the repair and calibration of test equipment and the building of custom test sets.1966-Summer Electronic Technician
Civil Defense HQ, Ft. Lauderdale, FLMy responsibilities included maintaining radio communication gear, including building some custom equipment. I was also responsible for maintaining electronic equipment at fallout shelter locations around the county.1965-Summer Electronic Technician
Civil Defense HQ, Ft. Lauderdale, FLMy responsibilities included maintaining radio communication gear, including building some custom equipment. I was also responsible for maintaining electronic equipment at fallout shelter locations around the county.1962-Summer Electronic Technician
Solar Research Inc. Ft. Lauderdale, FLI designed and helped to set up production for a solid state galvanic response "lie detector."1960-Summer Electronic technician trainee
MicroDyne Corp. Ft. Lauderdale, FL
High Frequency Measurements and Noise In Electronic Circuits, 1992, published by Van Nostrand Reinhold, ISBN #0-442-00636-5, 231 pages
- "Noise Injection for Design Analysis and Debugging," 2009 DesignCon Proceedings, http://www.emcesd.com/pdf/DC09_DCSmith.pdf
- "Determining the Effects of Package Parasitics on SI and EMC Performance," 2007 IMAPS Symposium Proceedings, http://www.emcesd.com/pdf/imaps07.pdf
- "Electromagnetic Interference (EMI) Inside a Hard Disk Drive Due to External ESD," 2002 EOS/ESD Symposium Proceedings, http://www.emcesd.com/pdf/2002-1B2.pdf
- "Sources of Impulsive EMI in Large Server Farms," 2002 EOS/ESD Symposium Proceedings, http://www.emcesd.com/pdf/2002-1B1.pdf
- "The EMI/ESD Environment of Large Server Installations," 2001 EOS/ESD Symposium Proceedings, pp. 385-389
- "ESD Immunity in System Designs, System Field Experiences and Effects of PWB Layout," 2000 EOS/ESD Symposium Proceedings, pp. 48-53.
- "Investigate System-Level ESD Problems," Test & Measurement World Magazine, November 1999, cover story.
- "Unusual Forms of ESD and Their Effects," 1999 EOS/ESD Symposium Proceedings, pp.329-333.
- "Signal and Noise Measurement Techniques Using Magnetic Field Probes," 1999 IEEE EMC Symposium Proceedings, pp. 559-563.
- "Electromagnetic Interference (EMI) Damage to Giant Magnetoresistive (GMR) Recording Heads", 1998 EOS/ESD Symposium (jointly authored with A. Wallash).
- "Metrology and Methodology of System Level ESD Testing", 1998 EOS/ESD Symposium (jointly authored with D. Lin, D. Pommerenke, J. Barth, L. G. Henry, H. Hyatt, M. Hopkins, and G. Senko).
- "Damage to Magnetic Recording Heads Due to Electromagnetic Interference", 1998 IEEE EMC Symposium (jointly authored with A. Wallash).
- "Current Probes, More Useful Than You Think", 1998 IEEE EMC Symposium.
- "A Method of Assessing Disk Drive EMI Performance for Large Arrays of Disks", 1998 IEEE EMC Symposium (jointly authored with G. Dutrow and G. Seebruch).
- "A Method for Troubleshooting Noise Internal to an IC", 1997 IEEE EMC Symposium.
- "Measurements of ESD HBM Events, Simulator Radiation and Other Characteristics Toward Creating a More Repeatable Simulation or; Simulators Should Simulate", 1996 EOS/ESD Symposium (jointly authored with J. Barth, D. Dale, K. Hall, D. McCarthy, H. Hyatt, and J. Nuebel).
- "An Investigation into the Performance of the IEC 1000-4-4 Capacitive Clamp", 1996 EOS/ESD Symposium.
- "A New Method for Measuring the Shielding Effectiveness of Interconnections in Shielding Technologies: Application to Cellular Phone Gaskets for the Housing", 1996 IEEE International Symposium on Electromagnetic Compatibility (jointly authored with Richard Haynes and Philip J. Muniz).
- "Measure Noise in Switching Supplies", Test & Measurement World, April 1996, pp. 11-12.
- "Coaxial Magnetic Probes and Applications", ITEM 1996, pp. 128-129 (jointly authored with Richard Haynes).
- "Balanced Probe Extends High-Frequency Measurements", IEEE Circuits & Devices, Vol. 10, No. 6, November 1994, pp. 19-23.
- "EMC Performance Comparison of Shielded and Unshielded Data Transmission Systems", EMC '94 Roma, International Symposium on Electromagnetic Compatibility, University of Rome "La Sapienza".
- "CISPR Conducted Emissions Measurements on Telecommunications Leads: An Improved Test Proposal", 1994 IEEE International Symposium on Electromagnetic Compatibility.
- "An Improved Method of Characterizing Shielding Materials", 1994 IEEE International Symposium on Electromagnetic Compatibility (jointly authored with Chauncey Herring and Richard Haynes both of the AT&T Engineering Research Center at Princeton, NJ).
- "Troubleshooting Using a Differential Coax Probe", IEEE Santa Clara Valley EMC '94.
- "A New Type of Furniture ESD and Its Implications", 1993 EOS/ESD Symposium.
- "Techniques and Methodologies for Making System Level ESD Response Measurements for Troubleshooting or Design Verification", 1992 EOS/ESD Symposium.
- "A Comparison of the Susceptibility Performance of Shielded and Unshielded Twisted Pair Cable for Data Transmission", 1992 International Symposium on Electromagnetic Compatibility (jointly authored with Bob Pritchard of AT&T Network Cable Systems).
- "Applying High Frequency Techniques to Measuring ESD Phenomena and its Effects", 1989 EOS/ESD Symposium.
- "Computer Simulation of ESD and Lightning Events", 1986 EOS/ESD Symposium.
- "Transmission Improvements on Local Loops by Using Active Terminations", 1978 International Symposium on Subscriber Loops and Services.
Over the last 26 years, I have independently developed seminars on high frequency measurement techniques, EMC design an troubleshooting techniques, and system level ESD design. These seminars have been taught at many companies in the US and overseas. In 1997 I delivered a guest lecture at a Norwegian University on high frequency measurement techniques. Since 2001 I have delivered classes in the Continuing Education Department of Oxford University.Early experience:
1987- presentI have conducted dozens of workshops, tutorials, and technical demonstrations at both the IEEE EMC Symposium and the EOS/ESD Symposum.
1987-1995 Electrical Overstress/Electrostatic Discharge (EOS/ESD) SymposiumDuring this period of time I served on the Steering Committee in many capacities including: General Chairman, Vice-General Chairman, Technical Program Chairman, Secretary, and Registration Chairman. In addition, I presented many tutorial programs on ESD immunity of electronic equipment, served as a technical session moderator many times and moderated many workshop discussion sessions.1990-1 KeyTek Pulsed EMI SeminarI lectured for KeyTek Instrument Corporation using their material on pulsed EMI. These were two day lectures covering the IEC 801 series of pulsed EMI standards as well as design techniques to meet them that were given in various locations in the US.
1968-69, Vanderbilt University in Nashville, TN: Chief Engineer for WRVU, the campus radio station.Top of Page
1962-65, various locations in Ft. Lauderdale, FL: Several times in this period I taught radio theory and Morse code classes for people studying to become amateur radio operators.