Synchronizing signal selection circuit
US5245431A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1991 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Aug 8, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a synchronizing signal selection circuit, in response to the input of a vertical synchronizing signal extracted from a composite synchronizing signal, a control signal is generated. The control signal is in a predetermined state during a period which begins when a first predetermined time period has elapsed after the input of the vertical synchronizing signal, and which terminates when a second predetermined time period has elapsed after the input of the vertical synchronizing signal. The composite synchronizing signal is output when the control signal is in the predetermined state, and a horizontal synchronizing signal separated the composite synchronizing signal is output when the control signal is in a state other than the predetermined state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.