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Introduction and advantages and disadvantages of the invention of the electronic tube
Release time：
2022-04-26
In 1904, the world's first electronic tube was born under the hands of British physicist Fleming. Fleming patented the invention for this purpose. The birth of human's first electronic tube marked the world's entry into the electronic age.
Introduction to the Invention of the Electron Tube
In 1904, the world's first electronic tube was born under the hands of British physicist Fleming. Fleming patented the invention for this purpose. The birth of human's first electronic tube marked the world's entry into the electronic age.
Speaking of the invention of the electronic tube, we must first start with the "Edison effect". Edison, the world-famous inventor, welded a small piece of metal near the carbon filament of the light bulb while studying the life of the incandescent light bulb. As a result, he discovered a strange phenomenon: Although the metal pieces are not in contact with the filament, if a voltage is applied between them, the filament will generate a current, which tends to the nearby metal pieces. Where did this mysterious current come from? Edison couldn't explain it either, but he took the time to patent the invention and called it the "Edison effect." Later, it was proved that the current is generated because the hot metal can emit electrons to the surrounding. But it was Fleming, a British physicist and electrical engineer, who first predicted that this effect would have practical value.
Advantages and disadvantages of electronic tubes
Due to the disadvantages of large size, high power consumption, severe heat generation, short life, low power utilization efficiency, fragile structure and the need for high-voltage power supply, most of its uses have now been basically replaced by solid-state device transistors. However, the electronic tube has strong load capacity, better linear performance than transistors, and has better working characteristics than transistors in the field of high frequency and high power, so it still continues to play an irreplaceable role in some places (such as high-power radio transmission equipment).
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