![]() Julius Lilienfeld had actually described what we know now as the field effect transistor, or FET (more specifically he predicted the JFET), in his patent of 1925, and it was the FET that the guys at Bell Labs were trying to produce when they developed the point-contact transistor. For some practical applications of BJTs, see my BJT Instructable. It wasn't until 1950 that Shockley developed the bi-polar transistor (BJTs) that became so ubiquitous, and still is today. William Shockley, John Bardeen and Walter Brattain of Bell Labs spent many years and LOTS of money researching and developing what became the point-contact transistor, which was a PNP type transistor and was successfully demonstrated as a voice amplifier on 23 Dec, 1947. ![]() The idea of the transistor was first developed and patented in 1925 by Julius Edgar Lilienfeld, but manufacturing techniques for the required materials weren't good enough to produce a high enough quality crystal and so development and testing came much later. Without them, life would be drastically different. Radios, phones, computers, game consoles, TVs, cars, toys. ![]() They are nearly everywhere, in nearly every electronic device we use. Transistors are arguably the most important electronic component in use today. ![]() (First of all, I made some edits to the HTML code for this I'ble, which is optimized for the desktop site, so it may not be ideally viewed on a mobile device.)
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