Circuit arrangement for a picture display device for generating a sawtooth-shaped line deflection current
US4464612A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 1982 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Jan 8, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/185
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for a picture display device for generating a sawtooth-shaped line deflection current, at least two controllable deflection switches which are switched at line frequency and are arranged in series. As a result thereof the line deflection coil is connected to a trace capacitor during the trace period. During the retrace period the two switches are rendered non-conductive substantially simultaneously and the coil, the trace capacitor and a retrace capacitance form a resonant network the elements of which determine the duration of the retrace period. Supply energy is supplied from a supply voltage source by means of a supply winding which is divided in at least two winding portions which are each connected by means of one end through a supply diode to the resonant network and by means of the other end to a deflection switch and are coupled to the source via a controllable supply switch, which switches at the line frequency. During at least a portion of the trace period the supply switch is in the conducting state while the supply diodes are non-conducting and are non-conducting during the remaining portion of the line period while the supply diodes conduct. The c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.