Electronics Pioneers & History
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 Heinrich Georg Barkhausen (1881-1956) was a German physicist who made important
contributions to the study of electromagnetism and solid-state physics. He is
best known for his discovery of the Barkhausen effect and Barkhausen noise,
which occur in ferromagnetic materials.
Barkhausen studied physics at the University of Berlin, where he earned his
doctorate in 1907. After working as a research assistant for several years, he
became a professor at the Technical University of Dresden in 1920.
In 1919, Barkhausen discovered the phenomenon of Barkhausen noise, which is
the noise caused by the movement of magnetic domains in a ferromagnetic
material. His work on the Barkhausen effect provided important insights into the
behavior of ferromagnetic materials and helped to establish the field of
solid-state physics.
Barkhausen also made significant contributions to the study of electrical
oscillations and electromagnetic waves. He developed a method for measuring the
frequency of high-frequency electrical oscillations, known as the
Barkhausen-Kurz method, which is still used today.
During World War II, Barkhausen worked on the development of radar technology
for the German military. After the war, he was briefly held as a prisoner of war
by the Allies before returning to his academic work. Barkhausen received many
honors during his career, including the Max Planck Medal and the Hughes Medal.
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 While working on an
update to my
RF Cafe Espresso Engineering Workbook project to add a couple calculators
about FM sidebands (available soon). The good news is that AI provided excellent
VBA code to generate a set of
Bessel function plots. The bad news is when I asked for a
table
showing at which modulation indices sidebands 0 (carrier) through 5 vanish,
none of the agents got it right. Some were really bad. The AI agents typically
explain their reason and method correctly, then go on to produces bad results.
Even after pointing out errors, subsequent results are still wrong. I do a
lot of AI work and see this often, even with subscribing to professional
versions. I ultimately generated the table myself. There is going to be a
lot of inaccurate information out there based on unverified AI queries, so
beware.
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