High voltage vertical dynamic focus amplifier
US5430358A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 1994 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | May 11, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A current transformer has a primary side winding coupled to a source of horizontal rate sawtooth yoke current and a secondary side in which a horizontal rate AC signal is developed. A rectifier has at least one capacitor, the rectifier receiving the horizontal rate AC signal and energizing a DC voltage across the at least one capacitor. A modulator for the DC voltage generates a first deflection rate waveform. A capacitor coupled to the modulator and to the secondary side of the transformer generates a second deflection rate waveform. The first and second deflection rate waveforms are combined to define a vertical dynamic focus voltage signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.