| 摘要 |
PURPOSE:To make it possible to eliminate the physical and technical restrictions owing to using a semiconductor by composing of an electrode couples approaching each other to make it possible to let flow a tunnel current in a space, and one or more electrodes to make it possible to control the tunnel current. CONSTITUTION:An anode 2 very close to cathodes 1 is provided, and by applying a positive voltage to the cathode 2 making cathode 1 as a standard, electrons flow from the cathode 1 to the anode 2 through the space by the tunnel phenomenon. Between the cathodes 1 and the anode 2, grids 3 being the control electrodes are arranged and by making the voltage of the grids 3 negative to the cathodes 1, the tunnel current value can be controlled. Consequently, such an electron tube has the property strong to radiant rays, and can be applied to the electric circuit for an artificial satellite and the like without providing a radiant ray shield. The restriction by using a semiconductor can be eliminated consequently. |
