Vertical deflection circuit
US5089755A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1991 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Feb 19, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K4/696
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A vertical amplifier of a vertical deflection circuit has an output transistor operating as a conductive switch that couples a boosted supply voltage to a vertical deflection winding during vertical retrace. A feedback network that bypasses the deflection winding is coupled between an output terminal and an input terminal of the amplifier to provide a phase lead. A clamping diode is coupled to the feedback network. The clamping diode reduces a magnitude of a feedback signal, during vertical retrace, in a manner to delay an instant in which the output transistor begins operating as an amplifier stage. The lengthening of vertical retrace due to the feedback signal is thereby reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.