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 Expert  108366

Expert in Power Electronics (DC to 3 GHz), RF Power, Switching-Mode Power Conversion, Analog Electronics

Available for your Consulting and Expert Witness Needs

Massachusetts (MA)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness Market Research

Summary of Expertise: Listed with other top experts in: 
Expert has both theoretical knowledge (see Selected Publications) and practical experience in designing equipment that was manufactured in quantity production, and in liaison with manufacturing and marketing organizations.

ELECTRONICS; POWER ELECTRONICS. Expert's Firm, specializes in electronics product design, design review, and design "fixes." (Expert has been one of the leading proponents of using design review to eliminate design "bugs" before a design is released to manufacturing.) Expert has expertise in a wide variety of fields, including analog (instrumentation, control, communications, RF, and EMI) and power (DC through UHF). Typical examples of his experience include analog signal processing, feedback control, switching-mode power converters and amplifiers, pulsed power drivers, and computer simulation. Expert also has experience in digital signal quality (signal integrity), which is the analysis and design of interconnecting PC-board layout, back planes, connectors, and cables for transmission of high-speed digital signals free of signal degradation and cross talk. One of his former employees (available on-call) is a leading expert in that field, and teaches courses on maintaining signal integrity.

SWITCHING CIRCUIT; SWITCHED-MODE POWER SUPPLY; AMPLIFIER. Expert is a recognized expert in circuit simulation, switching-mode power conversion, and RF-power-amplifier technology. He is a co-inventor of the Class E high-efficiency switching-mode RF power amplifier.

POWER CONVERTERS AND INVERTERS. Since 1968, Expert has developed and supervised development of many DC-DC power converters, DC-AC power inverters, and AC-DC rectifiers as well as a few surge suppressors to suppress surges on incoming power lines. Examples of the design projects that his company has completed include an uninterruptible (battery backed-up) "baby-AT" power supply; a programmable two-output power supply for electro-luminescent display; a gated 2.8-kV 3-MHz power oscillator; a 200-W general-purpose three-output switching-mode power supply; a regulated 100-watt DC-AC inverter; 1-MHz and 14-MHz switching-mode DC-DC power converters, and a high-efficiency low-cost DC-DC converter.

AUDIO AND RADIO-FREQUENCY (RF) POWER AMPLIFIERS. Expert has participated, since 1970, in the development of several audio power amplifiers and many RF power amplifiers, RF power generators, and radio transmitters. Some of these developments include 1.8-GHz and 2.45-GHz high-efficiency switching-mode RF power amplifiers and switching-mode high-efficiency CW and "Envelope-Elimination-and-Restoration" linear RF power amplifiers.

FEED-FORWARD CONTROL. Familiar with feed-forward-control concepts, Expert has several publications in the area. He is knowledgeable of designs for feed-forward control for switching-mode power converters. Using feed-forward techniques, he has worked to improve load and line transient response of switching regulators.

PARASITIC OSCILLATION. Expert understands the many causes of parasitic oscillation in RF power amplifiers; he can prevent the oscillation from occurring.




analog-signal processing


power electronics


radio-frequency power


radio-frequency power amplifier


switched-mode power supply circuit


switching circuit

"Alternating-current to direct-current conversion" is rectification (usually power rectification). He has designed, built, and tested power rectifiers for the numerous equipments he has designed and built since the time the expert became an engineer in 1950, through the time of writing this text (2005), i.e., 55 years of electronics-design work. There are too many to list here.

alternating-current to direct-current conversion


alternating-current to direct-current converter

The expert designed, built and tested many amplifier circuits during the past 55 years, and has published many papers on that subject. See his detailed 9-page resume (available on request) for numerous specific examples.

amplifier circuit


amplifier output stage

The expert has been designing, building, and testing "analog circuit"s during 55 years of electronics engineering. The expert has done much work in designing, building, testing, and calibrating "analog instrumentation"; see his 9-page resume (available on request) for numerous specific examples.

analog circuit


analog signal


analog instrumentation

He has analyzed, built, and tested "cathode follower"s.

cathode follower

He has used "circuit simulation" in his circuit-design and design-review work since about 1964. He has published technical papers and given lectures on circuit simulation; see his 9-page resume (available on request) for specfic examples. He designed the five circuit-simulation programs that are sold by his company (the programming was done by an expert programmer, not by the expert). "Computer-aided design" is closely related to "circuit simulation". See also his published papers on computer-aided design listed in his 9-page resume, available on request. "Computer-aided design" is one of the topics in a course he has presented 33 times (usually as a 2-day course).

circuit simulation


computer-aided design


computer simulation

He has designed, built, and tested many "class-A amplifier"s during his 55 years as an electronics-design engineer. In addition, "class-A amplifier" is one of the topics in a course he has presented 33 times, (usually as a 2-days course).

class-A amplifier

He has designed, built, and tested many "class-AB amplifier"s during his 55 years as an electronics-design engineer. In addition, "class-AB amplifier" is one of the topics in a course he has presented 33 times, (usually as a 2-day course).

class-AB amplifier

He has designed, built, and tested many "class-B amplifier"s during his 55 years as an electronics-design engineer. In addition, "class-B amplifier" is one of the topics in a course he has presented 33 times, (usually as a 2-day course).

class-B amplifier

He has designed, built, and tested many "class-C amplifier"s during his 55 years as an electronics-design engineer. In addition, "class-C amplifier" is one of the topics in a course he has presented 33 times, (usually as a 2-day course). In addition, see my published paper on the topic.

class-C amplifier

He has been designing, building, and testing "DC to DC conversion" since 1968. For a representative list of such projects, see his company's brochure "Switching-Mode Power Converters & Amplifiers", available on request.

DC to DC conversion

His company has been doing "design review" as a commercial service since 1966. For details, see his 4-page brochure "Electronic Design Review - Performance, Reliability, Cost, Human Factors, Producibility, Safety, Maintainability, EMI/EMC" and my published article, both available on request.

design review


electronic product design review

"Direct-current to alternating-current conversion" is one of the sub-topics in switching-mode power conversion. He has been concentrating in switching-mode power conversion since 1968. For representative examples of previous projects, see his brochure "Company Experience - Switching-Mode Power Converters & Amplifiers," available on request.

direct-current to alternating-current conversion

"Electronic equipment design" is a generic description of his professional work since 1951. Details are in his 9-page resume, and in his "Company Experience" brochures, available on request.

electronic equipment design

"Electronics engineering" is what he has been doing professionally since 1950. For details, see his 9-page resume and "Company Experience" brochures, both available on request.

electronics engineering

Some of his experience with "emitter follower" is documented in his publications, dealing with the details of an oscillation in an integrated-circuit operational amplifier, that he tracked-down to an oscillating emitter follower. He found the reason for the oscillation, and the cure. The IC-manufacturer applied the cure he suggested, and their modified design continued in production without any oscillation. The published paper is available on request.

emitter follower

He has been working on "power amplifier"s since 1968. Details are in his 9-page resume. He has presented courses on power amplifiers 33 times, mostly as 2-day courses.

power amplifier

"Radio-frequency power amplifier technology" is a subject he has been working on since 1968. He received the 2007 Microwave Pioneer award from the IEEE, and was elected a Fellow of the IEEE in 1989, for his contributions to that technology. Specific information on his extensive background is in his 9-page resume, available on request. He has presented a course on RF power amplifiers 35 times, mostly as 2-day courses.

radio-frequency power amplifier technology


radio transmitter

He has been doing "technical writing" since the time he became an engineer, in 1950. He does it well. His 9-page resume (available on request) lists his published technical papers. In addition, the 4504 projects (as of 3/6/2006) worked-on by his company have almost always been concluded with a technical report. His clients have usually been very pleased with the quality of his technical reports. In addition, he wrote the User Manuals for the five computer programs being sold by his company; they are typically about 200 pages long. Purchasers of those programs have remarked about how good the User Manuals were.

technical writing

Show Secondary and Basic Areas of Expertise
Expert may consult nationally and internationally, and is also local to the following cities: Boston, Massachusetts;  Worcester, Massachusetts;  Springfield, Massachusetts;  Lowell, Massachusetts;  Cambridge, Massachusetts;  Brockton, Massachusetts;  New Bedford, Massachusetts;  Hartford, Connecticut;  Manchester, New Hampshire;  and Providence, Rhode Island.

Often requested
with this expert:

Power Electronics and Renewable Energy Systems
Power Electronics, Motor Drives, Renewable Energy, Etc.
Power Electronics, Power Supplies
Power Electronics, Controls and System Design

Year   Degree   Subject   Institution   Honors
1950   M.S.   Electrical Engineering   Massachusetts Institute of Technology   Sigma Xi
1950   B.S.   Electrical Engineering   Massachusetts Institute of Technology   Eta Kappa Nu

Work History:
Years   Employer   Department   Title   Responsibilities

1965 to





President/Staff Engineer


He founded the company in 1965, and supervised up to six engineers and a secretary/office manager. He is now the sole employee and is responsible for all activities. He supervised and contributed to development and design-review projects in analog-signal processing and high-precision instrumentation, special processing of recorded radar data, video display equipment, digital data-communications equipment, prediction of nuclear-radiation effects on electronic equipment, redesign of clients' equipment to ameliorate EMI/RFI problems, and the following high-efficiency switching-mode power-electronics products: dc power supplies, dc-dc converters, capacitor-chargers for flash lamps (U.S. patent issued), RF power amplifiers (U.S. patent issued), high-efficiency *linear* RF power amplifiers (U.S. and British patents issued), high-speed/high-current pulse drivers for computer clock buses and PIN-diode RF-power switches; and development of PC software products for designing high-efficiency switching-mode dc-dc converters and RF power amplifiers.

1964 to 1965


Di/An Controls, Inc.


Research & Development Department


Manager of Research & Development


He managed and participated in all R&D projects, and assisted Engineering when they needed help. He directed development projects on low-power high-density aerospace magnetic-core memories, high-speed general-purpose core memories, magnetic-core/transistor logic elements and stable oscillators, and a system-design study for a satellite-borne digital data processor to insert latitude and longitude grids and auxiliary notations onto weather pictures to be transmitted from the Automatic Picture Transmission system on-board NIMBUS weather satellites.

1959 to 1964


Sylvania Electronic Systems Division


Advanced Development, Digital Electronic Techniques


Department Manager


He began as a Section Head in 1959 and was promoted to Department Manager in 1962. As Section Head, he was responsible for development of several series of digital logic circuits and modules for use in commercial digital flight simulators, military computers and cryptographic communications systems; and a semi-automatic tester for performing extensive testing of one of the series of digital modules. Three of the military developments went into large-scale production and demonstrated excellent performance and reliability in field service. As Department Manager, he was responsible for advanced development of digital electronic techniques, planning and directing development projects in all-magnetic logic, magnetic thin-film memory, 400-MHz tunnel-diode logic, data electronics and servos for a high-performance militarized magnetic tape transport, and automated design of electronic circuits. He also served as a consultant to Sylvania Semiconductor Division on logic functions and circuit design for digital-logic integrated circuits. Sylvania's introduction of TTL integrated circuits to the market evolved from his recommendations at that time.

1956 to 1959


Di/An Controls, Inc.




Senior Engineer, and also Technical Sales Manager in 1959


He was responsible for development of an interferometer counter and readout system with formatted Flexowriter punched tape and typed output for rocket-flight data reduction, and two different digital cross-correlated sonar signal detection systems using binary pseudo-random transmitted code streams. Each system cross-correlated the contents of two re-circulating shift registers. One system used two 500-stage 2-MHz transistor-circuit shift registers; the other used two 2048-bit coincident-current magnetic-core memories operated in sequential-address mode. He designed major portions of other core memories and special-purpose magnetic computing and data-processing equipment. As Technical Sales Manager in 1959 (in addition to his Senior-Engineer work), he was responsible for customer technical contacts, applications engineering, and preparation of product specifications and data sheets.

1951 to 1956


MIT Lincoln Laboratory



Staff Member (1951-1954); Air Force Lieutenant (1954-1956)


He designed an electronic facsimile system using a CRT flying-spot scanner, and the data modems for transmitting and receiving the facsimile signals via long-distance carrier-telephone circuits. He designed the equipment and the tests for experimental evaluation of his new synchronization method for transmission of digital data over carrier telephone circuits; his new method was shown to have greatly superior resistance to frequency shifts in a suppressed-carrier telephone system, and to noise on the telephone line. He performed a theoretical prediction and experimental confirmation of dynamic performance and error in a sampled-data azimuth-position servo for a radar PPI indicator. He designed the following subsystems for a digital radar-data processor later manufactured by IBM for the U.S. Air Force as the AN/FST-2: a video quantizer, a video-mapper attachment for a radar indicator, and clock and range-mark generators. He designed the memory-test equipment and conducted experiments on an air-supported magnetic drum for high-density storage of digital data. He calculated the expected propagation loss for a VHF radio link, taking account of the antennae heights and the terrain contour along the propagation path.

1950 to 1951


Holmes & Narver, Inc., Los Angeles, CA



Electronic Engineer


He installed, tested, and calibrated instrumentation and data-recording equipment, and did post-test data-reduction, for the 1951 series of atomic-weapons tests at Eniwetok Atoll in the Marshall Islands.

Career Accomplishments:

He is a Life Fellow of the Institute of Electrical and Electronics Engineers (IEEE), and a member of the IEEE professional groups on Power Electronics, Industrial Electronics, Industry Applications, and Microwave Theory and Techniques, and the IEEE Design Automation Technical Committee, Simulation Technical Committee, and Technical Committee on Computers in Power Electronics; and a Technical Advisor to the American Radio Relay League on RF power amplifiers and dc power supplies. He regularly reviews manuscripts submitted to journals and conferences, of IEEE, Institution of Electrical Engineers (IEE, in the U.K.), European Power Electronics, Institute of Electrical Engineers (IEE in Japan), and the South African Institute of Electrical Engineers.


Expert was elected a Fellow of the IEEE for his contributions to the technology of high-efficiency power conversion and RF-power amplification. He was elected a member of the Electromagnetics Academy, and a member of the Eta Kappa Nu and Sigma Xi academic honor societies.

Publications and Patents Summary

Expert holds eight patents in power electronics and has co-authored or sole-authored one book, chapters in two other books, and more than 100 technical papers.

Selected Publications and Publishers  
 - IEEE Transactions on Power Electronics, Institute of Electrical and Electronics Engineers (IEEE)  
 - IEEE Transactions on Microwave Theory and Techniques, Institute of Electrical and Electronics Engineers (IEEE)  
 - Analog Circuit Design (book Chapter), Kluwer Academic Publisher  
 - Proc. RF Expo East, Tampa, FL  
 - Power Electronics Technology and Applications (book), Institute of Electrical and Electronics Engineers (IEEE)  

Consulting Services:
Recent Client Requests:
  • Expert in switching mode power supply for consulting on review / analysis of switching mode power supply failure.
  • Expert in frequency conversion circuits for consulting on 2 prototype circuits for (1) 60 Hz to 500 kHz and (2) 500 kHz to 60 Hz.
  • Expert for consulting on Arc tracking and arc pressure.
  • Technical power expert for consulting on writing about the principles of power conversion.
  • RF power expert for consulting on creating a portable power source for devices.
  • Expert in remote electrical technology for consulting on failures to multiple variations of switches.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Expert Witness Experience Summary:
Expert has made technical analyses for law firms, submitted reports that were introduced as evidence, and testified at depositions, court trials, and an arbitration proceeding.
Recent Litigation Client Requests:
  • Radio frequency expert for consulting on remote crane control.
  • circuit design expert for consulting on analog electronics reliability.
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

Language Skills:
Foreign Language   Description
French   Expert speaks, reads, and writes French.

Market Research:
Expert has done the marketing for the products and services of his company.

Click the green button above to contact Expert for a free initial screening call regarding your marketing research, industry research, and company research needs.  For research needs involving multiple experts or secondary research, a Research Director can be assigned to coordinate the work into a custom report for you as a potentially quicker and more cost effective alternative to doing this work yourself or hiring a boutique consultancy.  Remember, your initial screening call to speak with Expert is free.

Additional Skills and Services:

Expert offers training as well as courses/seminars/tutorial sessions in power electronics and in RF (radio-frequency) power amplifiers. The course on RF power amplifiers has been presented 33 times, in the U.S., Canada, U.K, Germany, Singapore, Hong Kong, and Korea. The course on dc power supplies and dc-dc converters was presented in the U.S. and Japan.

Other Skills and Services

Expert does electronics design reviews, product design, and solves "unsolvable" problems for equipment manufacturing clients.


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