I have 61 years of experience and specialize in the field of electronics with specific knowledge in the areas of high-efficiency switching-mode power conversion, radio frequency microwave power amplifiers and high-efficiency DC-DC converters. I have published on such topics as high-efficiency switching-mode power conversion, radio frequency microwave power amplifiers and high-efficiency DC-DC converters, instrumentation, and optimization. I have testified 6 times on topics such as high-efficiency switching-mode power conversion, radio frequency microwave power amplifiers and high-efficiency DC-DC converters.