Cable length detection apparatus and method for a keyboarding video mouse switch
US7532998B2 · kind B2 · utility
1Cited by
5References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 21, 2005 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Jul 18, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2203/5495
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cable length detection apparatus is provided to detect the length of a cable having at least three pairs of wires for transmitting video signals. The cable length detection apparatus has a signal compressing circuit, a signal converting circuit and a length calculating circuit. The signal compressing circuit compresses an electrical signal into one pair of wires. The signal converting circuit converts the electrical signal transmitted by the pair of wires into a value. The length calculating circuit then calculates the length of the cable according to the value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.