Talk:Transistor

"grounded emitter, ..."

I saw the term grounded emitter used a few times. In literature I've read, the term is common emitter, common base, common collector and likewise with source, gate & drain for FETs. The term grounded is not used in some countries; it is called earthed - ground is called earth. I suggest that the term grounded should be changed to common, which is based, I believe, on network theory. Thank you. acmefixer@yahoo.com 2022-08-09. 2600:1700:CD40:C510:C569:E860:4740:249A (talk) 09:34, 9 August 2022 (UTC)

A grounded emitter circuit is a common emitter circuit, but not all common emitter circuits are grounded emitter circuits. The terms are used correctly in the article. Constant314 (talk) 11:55, 9 August 2022 (UTC)

Patent numbers?

In the article, it says:

The first bipolar junction transistors were invented by Bell Labs' William Shockley, who applied for patent (2,569,347) on June 26, 1948.

However, there seems to be an earlier patent (US2524033) that describes what appears to be a similar invention, with the patent going to John Bardeen. It was applied for four months before US2569347 and was also granted first (October 3, 1950 versus September 25, 1951). So is this article pointing to the correct patent and order of events? I am fairly experienced with electronics and semiconductors, but patent language and diagrams are so difficult to read that I'm having a hard time figuring out exactly what was claimed in each, and why John Bardeen applied for a patent 4 months before Shockley did for what appears to be a very similar device and design. For example, Figure 7 in Bardeen's patent appears to show a PNP stack, and he mentions that his device shows current gain, which is exactly what a transistor does.

Would appreciate some feedback or input from someone more experienced than I with reading patents and semiconductor physics (which I have only a passing understanding of). MrAureliusR_Talk! 01:10, 21 December 2023 (UTC)

Both were filed by "Bell Telephone Laboratories Inc"

• https://en.wikipedia.org/wiki/History_of_the_transistor

• https://en.wikipedia.org/wiki/John_Bardeen#Invention_of_the_transistor
• https://patents.google.com/patent/US2524033A/en?oq=US2524033
• https://patentimages.storage.googleapis.com/f8/53/1c/dc0c7b5252a663/US2524033.pdf

• https://en.wikipedia.org/wiki/William_Shockley#Development_of_the_transistor
• https://patents.google.com/patent/US2569347A/en?oq=US2569347
• https://patentimages.storage.googleapis.com/4c/d7/98/e30fdc30f7dc7d/US2569347.pdf

• Sbmeirow • Talk • 03:20, 21 December 2023 (UTC)

Was William Shockley actually one of the threesome who invented the point contact transistor?

In the article, it says, "The first working device was a point-contact transistor invented in 1947 by physicists John Bardeen, Walter Brattain, and William Shockley". However, I found a different article on the website Electronic Design, authored by Lou Frenzel, that gives contradictory information. Link: https://www.electronicdesign.com/technologies/analog/article/21808701/who-really-did-invent-the-transistor In the article, it says that William Shockley was not included in the first point contact transistor patent. Not sure what the correct action would be, though. Attihoch (talk) 17:18, 7 November 2024 (UTC)

Collector should be at top of PNP symbol

The PNP symbol under "Electronic symbol" should be flipped vertically, to put the collector at the top. That's the way it's usually shown in schematics. BMJ-pdx (talk) 13:23, 28 November 2024 (UTC)

I see it both ways. Constant314 (talk) 19:23, 28 November 2024 (UTC)