Raster centering circuit
US4032819E · kind E · reissue
2Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1975 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Jul 30, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A convergence circuit coupled in parallel with a deflection winding are AC coupled to an output terminal of a deflection amplifier. Rectifiers in the convergence circuit are poled such that the deflection amplifier output current is assymmetrically loaded during the trace portion of each deflection cycle, causing a net direct current of a first polarity through the deflection winding which off-centers the raster. A direct current path coupled in shunt with the yoke coupling capacitor permits conduction of a direct current of a second polarity through the deflection winding for controlling the centering of the raster.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.