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Title: The Evolution of the Microprocessor

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Subject: Technology
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Date: August 17, 2001
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Length: 7 / 1928
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One of the first uses of the Fleming diode was to detect weak signals produced by the new wireless telegraph. Later, the diode vacuum tube was used to convert AC into DC for power supplies in electronic equipment (Kuphaldt). Many inventors tried to improve the Fleming diode, but the only one who succeeded was American inventor Lee De Forest...

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In 1906, De Forest introduced a third electrode called the grid into the Fleming diode. (This grid was simply a bent wire between the plate and filament.) The grid changed (modulated) the current flowing from the filament to the plate when De Forest applied the signal from the wireless telegraph antenna to the grid instead of the filament...

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