Analog amplification vacuum tube
AssigneesNoritake Co., Limited, Noritake Itron Corporation
InventorsKazunori Tatsuda, Takehiro Nakao, Tomotaka Ezaki
Life of this patent
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Abstract
An analog amplification vacuum tube of the present invention suppresses influences of filament vibration on amplification characteristics. The analog amplification vacuum tube of the present invention is provided with a filament, an anode, a grid and a vibration-proof part. The filament is tensioned linearly and emits thermal electrons. The anode is disposed parallel to the filament. The grid is disposed between the filament and the anode so as to face the anode. The vibration-proof part includes a thin film usable in a vacuum environment and the thin film comes into contact with part of the filament.
Claims10
An analog amplification vacuum tube comprising:
- a filament tensioned linearly and emitting thermalelectrons;
- an anode disposed parallel to the filament;
- a grid disposed between the filament and the anode so as to face the anode;
- and
- a vibration-proof part comprising a thin film usable in a vacuum environment, the thin film coming into contact with part of the filament, wherein
- the filament comprises a fixing part where a positional relationship with the anode is constant, and a movable part fixed, via an elastic body, to a member where a positional relationship with the anode is constant, and
- the thin film of the vibration-proof part comes into contact with the filament at a position closer to the fixing part than the anode.
An analog amplification vacuum tube comprising:
- a filament tensioned linearly and emitting thermalelectrons;
- and
- two sets of a grid and an anode, wherein
- both of the anodes are formed on a same surface on a planar substrate,
- the filament is disposed parallel to the planar substrate at a position facing both of the anodes,
- each of the grids is disposed between the anode and the filament so as to face a same set of the anodes at a first predetermined distance and so as to have a second predetermined distance from the filament,
- the analog amplification vacuum tube comprises:
- an intermediate filament fixing part that fixes the filament at a position corresponding to an intermediate point between the anodes of the two sets;
- and
- two vibration-proof parts comprising a thin film usable in a vacuum environment,
- the thin film of one of the vibration-proof parts is in contact with the filament between the intermediate filament fixing part and a part facing one of the anodes, and
- the thin film of another of the vibration-proof parts is in contact with the filament between the intermediate filament fixing part and a part facing another of the anodes.
An analog amplification vacuum tube comprising:
- a filament tensioned linearly and emitting thermalelectrons;
- an anode disposed parallel to the filament;
- a grid disposed between the filament and the anode so as to face the anode;
- and
- a vibration-proof part comprising a thin film usable in a vacuum environment, the thin film coming into contact with part of the filament, wherein the thin film is a thin film made of carbon-based material, aluminum or magnesium.
An analog amplification vacuum tube comprising:
- a filament tensioned linearly and emitting thermalelectrons;
- an anode disposed parallel to the filament;
- a grid disposed between the filament and the anode so as to face the anode;
- and
- a vibration-proof part comprising a thin film usable in a vacuum environment, the thin film coming into contact with part of the filament, wherein the thin film is a graphite thin film.
Dependencies are inferred from the claim text.