Assymetric top-bottom pincushion correction circuit
US4093895A · kind A · utility
8Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 3, 1976 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | May 3, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/237
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a top-bottom pincushion correction circuit having a saturable reactor with a control winding coupled to a source of deflection current at a horizontal scan frequency and an output winding coupled to a source of deflection current at a vertical scan frequency, a means coupled to the control winding unbalances the waveform applied thereto from the source of deflection current at a vertical scan frequency to provide asymmetric top-bottom pincushion correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.