Boncuk New Member Apr 23, 2009 #1 Hi, there is an article in ELEKTOR magazine about operational amplifiers using vacuum valves. Here is the picture of the first reliably working OpAmp, made by Philbrick Researches 1952. Impressive, isn't it? Boncuk Attachments Valve-Opamp.jpg 17.1 KB · Views: 255 Last edited: Apr 23, 2009
Hi, there is an article in ELEKTOR magazine about operational amplifiers using vacuum valves. Here is the picture of the first reliably working OpAmp, made by Philbrick Researches 1952. Impressive, isn't it? Boncuk
Hero999 Banned Apr 24, 2009 #2 I believe I've seen that picture before, I can't remember where though.
Nigel Goodwin Super Moderator Most Helpful Member Apr 24, 2009 #3 Hero999 said: I believe I've seen that picture before, I can't remember where though. Click to expand... Same here, it's on this 741 tutorial page (and no doubt loads of other places)
Hero999 said: I believe I've seen that picture before, I can't remember where though. Click to expand... Same here, it's on this 741 tutorial page (and no doubt loads of other places)