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Patent US 2883619A: Difference between revisions
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|Grant date=1959-04-21 | |Grant date=1959-04-21 | ||
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The 10th Tektronix patent, this is the famous invention of using lossy coax cable (a resistive center conductor) in a passive probe to dampen reflections and ringing. | |||
[[John Kobbe]] said: | |||
<blockquote> | |||
"Another anticipated problem with passive probe, we knew a signal bounced back and forth so we could not use the standard probe. | |||
While thinking about things to do like some damping resistors. Why not us a fine resistance wire as the center conductor. | |||
This time we really lucked out, it worked better than anticipated. It was even patent-able as was [[Patent US 2804571A|unblanking]] and [the] sweep circuit." | |||
</blockquote> | |||
==See also== | |||
* [https://w140.com/US2930986.pdf US2930986.pdf] | |||
* [https://vintagetek.org/oscilliscope-patents/ Tek Stories: Oscilloscope Patents] by John Kobbe | |||
* [http://dfad.com.au/links/THE%20SECRET%20WORLD%20OF%20PROBES%20OCt09.pdf Doug Ford, ''The Secret World of Oscilloscope Probes''] | |||