Arrangement for temporal detection of a signal edge of an electrical signal transmitted over a transmission line
US5378946A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1993 |
| Grant date | Jan 3, 1995 |
| Priority date | — |
| Expiry date | Apr 30, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/142
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Two edge detectors (12, 13) at the input (10.1) and the output (10.2) of a delay line (10) of the edge detector arrangement (11) generate detection signals of identical shape at the detected signal edges of a signal traveling over the delay line. The delay time of the delay line is selected so that the two detection signals partly overlap in time. A subtraction arrangement (16) generates, from the two detection signals, a difference signal that contains, in the overlap region, a zero crossing that can be detected by a zero crossing detector (17). At the time of this zero crossing, the zero crossing detector generates the switching edge of an edge detection signal that controls, for example, a signal switcher (9).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.