文件名称：Smart AD and DA Conversion
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更新时间：2021-11-26 11:20:29
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The history of the application of semiconductors for controlling currents goes back all the way to 1926, in which Julius Lilienfeld filed a patent for a “Method and apparatus for controlling electric currents” [1], which is considered the first work on metal/semiconductor field-effect transistors. More well-known is the work of William Shockley, John Bardeen and Walter Brattain in the 1940s [2, 3], after which the development of semiconductor devices commenced. In 1958, independent work from Jack Kilby and Robert Noyce led to the invention of integrated circuits. A few milestones in IC design are the first monolithic operational amplifier in 1963 (Fairchild μA702, Bob Widlar) and the first onechip 4-bit microprocessor in 1971 (Intel 4004).