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Carl Battjes: Difference between revisions
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|Names=Carl Robert Battjes | |Names=Carl Robert Battjes | ||
|Birth date=30 December 1929 | |Birth date=30 December 1929 | ||
|Birth place= | |Birth place=Grand Rapids, MI | ||
|Death date=28 April 2007 | |Death date=28 April 2007 | ||
|Death place= | |Death place=Portland, OR | ||
|Countries= | |Countries=USA | ||
|Affiliations=Sylvania;Tektronix; | |Affiliations=Sylvania;Tektronix; | ||
|Wikidata id= | |Wikidata id= | ||
}} was a Tektronix engineer. | }} was a Tektronix engineer. | ||
In 1950 he joined the U.S. Air Force and trained as a fighter pilot flying [[wikipedia:Republic F-84 Thunderjet|F-84s]]. | |||
In 1958 he graduated from the University of Michigan with a bachelor's degree in electrical engineering, then moved to Silicon Valley where he worked at Sylvania while completing his master's in electrical engineering from Stanford in 1960<ref>[https://obits.oregonlive.com/us/obituaries/oregon/name/carl-battjes-obituary?id=19269082 Carl Battjes Obituary] @ OregonLive</ref>. | |||
Battjes had designed a 300 MHz transistor amplifier at [[Sylvania]] before he joined Tektronix in 1961 to work on high-speed amplifiers. | Battjes had designed a 300 MHz transistor amplifier at [[Sylvania]] before he joined Tektronix in 1961 to work on high-speed amplifiers. | ||
He invented the [[ft doubler|"f<sub>t</sub> doubler" amplifier topology]] that has a current gain of 2 even at the | He invented the [[ft doubler|"f<sub>t</sub> doubler" amplifier topology]] that has a current gain of 2 even at the transition frequency of the transistors that are used in the circuit. | ||
In 1971, Battjes left the portable oscilloscope group and joined the IC design group within Tektronix. | In 1971, Battjes left the portable oscilloscope group and joined the IC design group within Tektronix. | ||
He founded and taught the Tek Amplifier Frequency and Transient Response (AFTR) course<ref>[https://picture.iczhiku.com/resource/eetop/sHIglUHSZETZeBBN.pdf D.Feucht, ''Designing High-Performance Amplifiers'']</ref>. | |||
He took early retirement in 1983, then did consulting for the next 10 years as a registered professional engineer. | |||
From ''Who Wakes the Bugler?'' (s.b.): | |||
<blockquote> | |||
While on a camping trip in Oregon in 1961, | |||
I stopped at Tektronix and received an interview and a job offer the same day. Tektronix wanted me. | |||
They were at a stage where they needed to exploit transistors to build fast, high-performance 'scopes. | |||
I had designed a 300 MHz transistor amplifier while working at Sylvania. | |||
In 1961, that type of experience was a rare commodity. | |||
Actually, I had designed a wideband 300 MHz IF amplifier that only achieved 200 MHz. | |||
What we (Sylvania) used was a design that my technician came up with that made 300 MHz. | |||
So I arrived at this premier oscilloscope company feeling somewhat of a fraud. | |||
I was more than just a bit intimidated by the Tektronix reputation and | |||
the distributed amplifiers and artificial delay lines and all that stuff that really worked. | |||
The voltage dynamic range, the transient response cleanliness, | |||
and DC response requirements for a vertical output amplifier made my low-power, | |||
50 Ohm, 300 MHz IF amplifier seem like child's play. | |||
Naturally, I was thrown immediately into the job of designing high-bandwidth oscilloscope transistor vertical-output amplifiers. | |||
I felt like a private, fresh out of basic training, on the front lines in a war. | |||
</blockquote> | |||
[https://vintagetek.org/years-at-tektronix-hofer/ According to Bruce Hofer], | |||
<blockquote> | |||
It was also around this time that I was asked to take over the instructor responsibilities of “AFTR”, | |||
Amplifier Frequency and Transient Response, an in-house course developed by Carl Battjes. | |||
I wasn’t sure I was up to the challenge, but soon became comfortable in this new role. | |||
AFTR was a virtual pre-requisite among analog designers. | |||
Carl’s focus had been solely on vertical amplifiers, | |||
so I added a lot of new material related to the design of other types of amplifiers. | |||
I ended up teaching the course for 7 years. | |||
Some years later when Carl became terminally ill, he begged me to “write the book” for him. | |||
Alas, I did not have the time, having moved on into a very different design realm. | |||
</blockquote> | |||
==Tek Products== | ==Tek Products== | ||
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* "Who Wakes the Bugler?", in ''The Art and Science of Analog Circuit Design'', Jim Williams (Ed.), July 1998. ISBN 978-0-7506-7062-3. → [https://books.google.at/books?id=SPwqg7qpFWUC&pg=PR7 Google Books] | * "Who Wakes the Bugler?", in ''The Art and Science of Analog Circuit Design'', Jim Williams (Ed.), July 1998. ISBN 978-0-7506-7062-3. → [https://books.google.at/books?id=SPwqg7qpFWUC&pg=PR7 Google Books] | ||
* "Short Pulse Technique of Adjusting Wideband Amplifiers", in [[Media:Tekscope 1971 V3 N1 Jan 1971.pdf|Tekscope Vol. 3 No. 1 January 1971]] | * "Short Pulse Technique of Adjusting Wideband Amplifiers", in [[Media:Tekscope 1971 V3 N1 Jan 1971.pdf|Tekscope Vol. 3 No. 1 January 1971]] | ||
{{Documents|Author=Carl Battjes}} | |||
==References== | |||
<references /> | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Carl Battjes.jpg | Carl Battjes.jpg | ||