Method and system for controlling electron beam quantity in camera tube
US3999011A · kind A · utility
11Cited by
6References
4Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 17, 1974 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | May 17, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for controlling the quantity of an electron beam in a camera tube in which scanning beam current scans a target electrode to be converted into signal current by the target electrode and this signal current is fed back in the form of a voltage signal to a beam control electrode through a feedback circuit, the amplification factor of this feedback circuit being selected to be smaller than the reciprocal of the maximum efficiency of conversion of the scanning beam current into the signal current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.