Apparatus for controlling amplitude of vertical deflection signal
US4682087A · kind A · utility
2Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 28, 1986 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Jan 28, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/27
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An amplitude of a sawtooth signal of a vertical period of a television signal is controlled. A level discriminating circuit 7 discriminates whether or not the amplitude of the sawtooth signal of the vertical period lies within a level of an almost proper level. There is provided a counter 9 to count a vertical sync signal when the amplitude is out of this level range. An output of the counter 9 is converted into an analog amplitude control signal by a D/A converter 12, thereby making it possible to control the amplitude at a high response speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.