Audio loading modulated side pincushion correction circuit
US4910441A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1989 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Feb 21, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/233
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The power demand of a dynamic audio load is monitored, for example, by sensing the voltage level of the power supplying the audio load. An audio load control signal corresponding to the power demand is generated. The audio load control signal is advantageously applied to a circuit for producing a side pincushion correction current, for modulating the side pincushion correction current by the audio load demand. The audio load modulated side pincushion correction current is used to modulate a horizontal deflection current in order to compensate for both side pincushion distortion and dynamic audio load induced raster width distortion. A filter network may also be provided for removing high frequency signal components from the audio load control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.