Vacuum tube
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United States of America Patent
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Mar 7, 2017
Grant Date -
Jul 21, 2016
app pub date -
Jan 19, 2016
filing date -
Jan 20, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
An object of the present invention is to provide a vacuum tube with a structure close to that of an inexpensive and easily available vacuum fluorescent display which easily operates as an analog amplifier. A vacuum tube subject to the present invention comprises: a filament which is tensioned linearly and emits thermoelectrons, an anode arranged parallel to the filament, and a grid arranged between the filament and the anode such that the grid faces the anode. The present invention is characterized in that a distance between the filament and the grid is between 0.2 mm and 0.6 mm, including 0.2 mm and 0.6 mm.
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