Capacitive coupling device for an electron tube
US4302705A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1979 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | Sep 18, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J19/78
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A coupling electrode is placed within the vacuum envelope of an electron tube of coaxial geometry which is insulated from the anode of the tube by means of an insulator. The insulator is joined to the coupling electrode and the anode of the tube by means of flanged collars. One of these collars may serve to connect the coupling electrode to one or a number of external circuits. A capacitive coupling is established between a top cap of one grid of the tube, namely the grid cap located nearest the coupling electrode, and the coupling electrode. The distance and therefore the coupling capacitance between the grid cap and the coupling electrode can be made variable by mounting the coupling electrode on a deformable metallic bellows element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.