Efficiency improvements on IOTs

Author

Langlois, M.

Author_Institution

Thales Electron Devices, Thonon, France

fYear

2003

fDate

28-30 May 2003

Firstpage

22

Lastpage

23

Abstract

This paper discusses the measures for efficient improvement on IOTs (inductive output tubes), and the trend of power increase with time. For analog TV, the average power varies substantially with picture content and standard. CW operation benefits of much better efficiencies because linearity and bandwidth are not needed. Enhancing beam efficiency was obtained by two ways: 1) better design of the gun and the output circuit. 2) use of depressed collectors, in which the electrons travel through retarding electric field and eventually fall on a collector with very little kinetic energy left. The different collectors are energized at various high voltage levels, calling for insulating cooling medium.

Keywords

electron guns; television picture tubes; CW operation; analog TV; beam efficiency; cooling medium; depressed collectors; electron gun design; electrons travelling; inductive output tube efficiency; kinetic energy; output circuit design; picture content; retarding electric field; Bandwidth; Circuits; Electron beams; Insulation; Kinetic energy; Linearity; Power measurement; TV; Time measurement; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics, 2003 4th IEEE International Conference on

Print_ISBN

0-7803-7699-4

Type

conf

DOI

10.1109/IVEC.2003.1286010

Filename

1286010