Power supply for a television receiver
US3980821A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1975 |
| Grant date | Sep 14, 1976 |
| Priority date | — |
| Expiry date | Aug 29, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A power supply which produces a pulsating direct current potential from a first source of alternating current potential and provides a direct current potential to a means for developing a viewable display on a kinescope utilizes a filter network which includes a first inductor. The first inductor provides for a relatively constant level of direct current potential to the means for developing a viewable display with a predetermined range of direct current being supplied to the means for developing a viewable display and a relatively constant level of pulsating direct current potential. A second inductor magnetically coupled to the first inductor and the means for developing a viewable display provides a second alternating current potential greater than a predetermined level to the means for developing a viewable display. The second alternating current potential level decreases to a level below the predetermined level when the inductance of the first inductor decreases to a value less than the predetermined inductance level, thereby rendering the kinescope unviewable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.