Auxiliary coil driver circuit for a cathode ray tube
US7183713B2 · kind B2 · utility
0Cited by
13References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2003 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Apr 16, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/29
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic field compensation winding arrangement for a cathode ray tube includes a magnetic field compensation winding positioned on the cathode ray tube to compensate for an ambient magnetic field. An operational amplifier is used for generating a magnetic field compensation current in the winding. A pair of digital-to-analog converters are used for generating a pair of signals, respectively, that are coupled to the amplifier to control the magnetic field compensation current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.